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  • Question 1 - When there is the presence of distended and engorged veins in the umbilical...

    Incorrect

    • When there is the presence of distended and engorged veins in the umbilical area, which of the following portosystemic anastomoses has most likely occurred?

      Your Answer: Para-umbilical veins and azygous vein

      Correct Answer: Para-umbilical veins and inferior epigastric vein

      Explanation:

      Caput medusae is a condition that consists of collateral veins radiating from the umbilicus and results from recanalization of the umbilical vein.

      Under normal conditions, the portal venous blood traverses the liver and drains into the inferior vena cava of the systemic venous circulation by way of the hepatic veins. This is the direct route. However, other, smaller communications exist between the portal and systemic systems, and they become important when the direct route becomes blocked. These communications are as follows:

      At the lower third of the oesophagus, the oesophageal branches of the left gastric vein (portal tributary) anastomose with the oesophageal veins draining the middle third of the oesophagus into the azygos veins (systemic tributary).

      Halfway down the anal canal, the superior rectal veins (portal tributary) draining the upper half of the anal canal anastomosis with the middle and inferior rectal veins (systemic tributaries), which are tributaries of the internal iliac and internal pudendal veins, respectively.

      The paraumbilical veins connect the left branch of the portal vein with the superficial veins of the anterior abdominal wall (systemic tributaries). The paraumbilical veins travel in the falciform ligament and accompany the ligamentum teres.

      The veins of the ascending colon, descending colon, duodenum, pancreas, and liver (portal tributary) anastomose with the renal, lumbar, and phrenic veins (systemic tributaries).

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      66.8
      Seconds
  • Question 2 - You proceed to administer lorazepam intravenously to a 21-year-old patient with status epilepticus....

    Incorrect

    • You proceed to administer lorazepam intravenously to a 21-year-old patient with status epilepticus. Which of the following best describes lorazepam's action?

      Your Answer: Inhibits effect of GABA

      Correct Answer: Potentiates effect of GABA

      Explanation:

      Lorazepam is a type of benzodiazepine.

      Benzodiazepines are gamma-aminobutyric acid (GABA) receptor agonists with sedative, hypnotic, anxiolytic, anticonvulsant, and muscle relaxant characteristics that promote inhibitory synaptic transmission across the central nervous system.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
      151.9
      Seconds
  • Question 3 - Which of these is NOT a lithium side effect: ...

    Correct

    • Which of these is NOT a lithium side effect:

      Your Answer: Peptic ulcer disease

      Explanation:

      Adverse Effects of lithium Include

      Leucocytosis (most patients)
      Polyuria/polydipsia (30-50%)
      Dry mouth (20-50%)
      Hand tremor (45% initially, 10% after 1 year of treatment)
      Confusion (40%)
      Decreased memory (40%)
      Headache (40%)
      Muscle weakness (30% initially, 1% after 1 year of treatment)
      Electrocardiographic (ECG) changes (20-30%)
      Nausea, vomiting, diarrhoea (10-30% initially, 1-10% after 1-2 years of treatment)
      Hyperreflexia (15%)
      Muscle twitch (15%)
      Vertigo (15%)
      Extrapyramidal symptoms, goitre (5%)
      Hypothyroidism (1-4%)
      Acne (1%)
      Hair thinning (1%)

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
      18.1
      Seconds
  • Question 4 - A patient suffers from an injury to his hip and thigh. As a...

    Correct

    • A patient suffers from an injury to his hip and thigh. As a consequence of his injury, the nerve that was damaged innervates the obturator externus muscle.

      In which of the following nerves is the obturator externus muscle innervated by?

      Your Answer: Posterior branch of the obturator nerve

      Explanation:

      The obturator externus is innervated by the posterior branch of the obturator nerve, L2-L4.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      96.3
      Seconds
  • Question 5 - Which of the following is NOT a typical feature of an abducens nerve...

    Incorrect

    • Which of the following is NOT a typical feature of an abducens nerve palsy:

      Your Answer: Horizontal diplopia

      Correct Answer: Inability to look up

      Explanation:

      CN VI palsies result in a convergent squint at rest (eye turned inwards) with inability to abduct the eye because of unopposed action of the rectus medialis. The patient complains of horizontal diplopia when looking towards the affected side. With complete paralysis, the eye cannot abduct past the midline.

    • This question is part of the following fields:

      • Anatomy
      • Cranial Nerve Lesions
      249.8
      Seconds
  • Question 6 - A 40-year-old woman presents with retrosternal central chest pain that she has been...

    Incorrect

    • A 40-year-old woman presents with retrosternal central chest pain that she has been complaining about for the past two days. Upon deep inspiration and while lying flat, the pain worsens but relieved by sitting forwards. The pain radiates to both of her shoulders. The result of her ECG shows widespread concave ST-elevation and PR depression. A diagnosis of pericarditis is suspected.

      Which of the following nerves is responsible for the pattern of her pain?

      Your Answer: Vagus nerve

      Correct Answer: Phrenic nerve

      Explanation:

      Pericarditis is inflammation of the pericardial sac and is the most common pathologic process involving the pericardium. Frequently, pericardial inflammation can be accompanied by increased fluid accumulation within the pericardial sac forming a pericardial effusion, which may be serous, hemorrhagic or purulent depending on aetiology.

      The classic presentation is with chest pain that is central, severe, pleuritic (worse on deep inspiration) and positional (improved by sitting up and leaning forward). The pain may also be radiating and may involve the ridges of the trapezius muscle if the phrenic nerve is inflamed as it traverses the pericardium.

    • This question is part of the following fields:

      • Anatomy
      • Thorax
      134.3
      Seconds
  • Question 7 - A 62 year old man has sustained a penetrating injury to the submandibular...

    Incorrect

    • A 62 year old man has sustained a penetrating injury to the submandibular triangle. On examination, his tongue is weak and when protruded deviates to the left. Which of the following nerves has most likely been injured:

      Your Answer: Right hypoglossal nerve

      Correct Answer: Left hypoglossal nerve

      Explanation:

      Damage to the hypoglossal nerve results in weakness of the tongue, with deviation of the tongue towards the weak side on protrusion.

    • This question is part of the following fields:

      • Anatomy
      • Cranial Nerve Lesions
      60.2
      Seconds
  • Question 8 - Regarding the flexor digitorum profundus muscle, which of the following is true? ...

    Correct

    • Regarding the flexor digitorum profundus muscle, which of the following is true?

      Your Answer: The medial aspect of the muscle is innervated by the ulnar nerve

      Explanation:

      Flexor digitorum profundus is a fusiform muscle located deep within the anterior (flexor) compartment of the forearm. Along with the flexor pollicis longus and pronator quadratus muscles, it comprises the deep flexor compartment of the forearm.

      Flexor digitorum profundus has a dual innervation:

      (1) The medial part of the muscle, that inserts to the fourth and fifth digits, is innervated by the ulnar nerve (C8-T1);

      (2) The lateral part, that inserts to the second and third digits, is innervated by the median nerve, via anterior interosseous branch (C8-T1).

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      185.3
      Seconds
  • Question 9 - A 70-year-old man presents with right-sided hemiplegia and loss of joint position sense,...

    Incorrect

    • A 70-year-old man presents with right-sided hemiplegia and loss of joint position sense, vibratory sense, and discriminatory touch. Upon further physical examination, it was observed that her tongue deviates to the left-hand side. An MRI and CT scan was ordered and results showed that he was suffering a left-sided stroke.

      Branches of which of the following arteries are most likely implicated in the case?

      Your Answer: Posterior spinal artery

      Correct Answer: Anterior spinal artery

      Explanation:

      Medial medullary syndrome is a form of stroke that affects the medial medulla of the brain. It is caused by a lesion in the medial part of the medulla, which is due to an infraction of vertebral arteries and/or paramedian branches of the anterior spinal artery.

      It is characterized by contralateral paralysis of the upper and lower limb of the body, a contralateral decrease in proprioception, vibration, and/or fine touch sensation, paresthesias or less commonly dysesthesias in the contralateral trunk and lower limb, and loss of position and vibration sense with proprioceptive dysfunction. Ipsilateral deviation of the tongue due to ipsilateral hypoglossal nerve damage can also be seen.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      211.3
      Seconds
  • Question 10 - The following statements are not true of the extensor carpi radialis brevis muscle,...

    Correct

    • The following statements are not true of the extensor carpi radialis brevis muscle, except?

      Your Answer: It receives its blood supply from the radial artery

      Explanation:

      Extensor carpi radialis brevis is a fusiform muscle found in the lateral part of the posterior forearm. Together with anconaeus, brachioradialis, extensor carpi radialis longus, extensor digitorum, extensor digiti minimi and extensor carpi ulnaris, it belongs to the superficial forearm extensor group. Extensor carpi radialis brevis originates from the lateral epicondyle of humerus via the common extensor tendon. This is a common origin that it shares with the extensor digitorum, extensor digiti minimi and extensor carpi ulnaris muscles. Some fibres also originate from the lateral intermuscular septum, a thick aponeurosis that covers the muscle itself, and from the radial collateral ligament.

      The muscle courses inferiorly, giving off a long tendon in the middle of the forearm which descends towards the dorsal hand. The tendon passes through a groove on the posterior surface of radius, deep to the extensor retinaculum. After traversing the extensor retinaculum space, the tendon inserts into the posterior aspect of the base of the third metacarpal bone.

      Extensor carpi radialis brevis is innervated directly by the radial nerve (C5- C8), or sometimes from its deep branch/posterior interosseous nerve. The radial nerve stems from the posterior cord of the brachial plexus.

      The muscle is vascularized by the radial recurrent artery, radial artery and deep brachial artery (via its radial collateral branch).

      Extensor carpi radialis brevis works together with extensor carpi ulnaris and extensor carpi radialis longus to extend the hand at the wrist joint. This action is vital in a sequence of muscle contractions needed for clenching a fist or making a grip. When performing these functions, wrist extension blocks the flexor muscles from on acting upon the hand. Instead, flexors act only on the digits, thereby flexing them and producing an effective hand grip, such as that seen in a tennis backhand. When the extensor carpi radialis brevis muscle contracts together with extensor carpi radialis longus and flexor carpi radialis, it contributes to producing hand abduction (radial deviation).

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      55932.5
      Seconds
  • Question 11 - All of the following typically occurs as part of normal inspiration except: ...

    Incorrect

    • All of the following typically occurs as part of normal inspiration except:

      Your Answer: Flattening of the diaphragm

      Correct Answer: Contraction of the internal intercostal muscles

      Explanation:

      Passive inspiration is a result of contraction of the diaphragm (depressing the diaphragm) and the external intercostal muscles (elevating the ribs).
      In inspiration, several movements occur. These are:
      1. elevation of the sternal ends of the ribs (‘pump handle’ movement),
      2. elevation of the lateral shafts of the ribs (‘bucket handle’ movement)
      3. depression of the diaphragm.
      These result in expansion of the thorax in an anteroposterior, transverse and vertical direction respectively. There is an increased intrathoracic volume and decreased intrathoracic pressure and air is drawn into the lungs.

    • This question is part of the following fields:

      • Anatomy
      • Thorax
      120
      Seconds
  • Question 12 - If a lesion is observed in Broca's area, which function is expected to...

    Correct

    • If a lesion is observed in Broca's area, which function is expected to become affected?

      Your Answer: Formation of words

      Explanation:

      The primary functions of the Broca area are both language production and comprehension. While the exact role in the production is still unclear, many believe that it directly impacts the motor movements to allow for speech. Although originally thought to only aid in speech production, lesions in the area can rarely be related to impairments in the comprehension of language. Different regions of the Broca area specialize in various aspects of comprehension. The anterior portion helps with semantics, or word meaning, while the posterior is associated with phonology, or how words sound. The Broca area is also necessary for language repetition, gesture production, sentence grammar and fluidity, and the interpretation of others’ actions.

      Broca’s aphasia is a non-fluent aphasia in which the output of spontaneous speech is markedly diminished and there is a loss of normal grammatical structure. Specifically, small linking words, conjunctions, such as and, or, and but, and the use of prepositions are lost. Patients may exhibit interjectional speech where there is a long latency, and the words that are expressed are produced as if under pressure. The ability to repeat phrases is also impaired in patients with Broca’s aphasia. Despite these impairments, the words that are produced are often intelligible and contextually correct. In pure Broca’s aphasia, comprehension is intact.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      1667.8
      Seconds
  • Question 13 - A 26-year old female comes to the Emergency Room with complaints of bloody...

    Correct

    • A 26-year old female comes to the Emergency Room with complaints of bloody stools. She reports that prior to the passage of bloody stools, she experienced a sharp pain during defecation. Medical history reveals that she has been experiencing constipation for the past 2 weeks. After completing her medical history and physical examination, the attending physician gives an initial diagnosis of an anal fissure.

      Which of the following nerves transmit painful sensation from the anus, resulting in the pain associated with anal fissure?

      Your Answer: Inferior rectal nerve

      Explanation:

      A fissure in ano is a tear in the anoderm distal to the dentate line. The pathophysiology of anal fissure is thought to be related to trauma from either the passage of hard stool or prolonged diarrhoea. A tear in the anoderm causes spasm of the internal anal sphincter, which results in pain, increased tearing, and decreased blood supply to the anoderm. The site of the anal fissure in the sensitive lower half of the anal canal, which is innervated by the inferior rectal nerve, results in reflex spasm of the external anal sphincter, aggravating the condition. Because of the intense pain, anal fissures may have to be examined under local anaesthesia.

      The inferior rectal nerve is a branch of the pudendal nerve. This nerve runs medially across the ischiorectal fossa and supplies the external anal sphincter, the mucous membrane of the lower half of the anal canal, and the perianal skin.

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      374.5
      Seconds
  • Question 14 - Which segment of the colon is most likely to be affected in diverticulitis?...

    Correct

    • Which segment of the colon is most likely to be affected in diverticulitis?

      Your Answer: Sigmoid colon

      Explanation:

      Diverticulitis refers to inflammation and infection associated with a diverticulum and is estimated to occur in 10% to 25% of people with diverticulosis. Peridiverticular and pericolic infection results from a perforation (either macroscopic or microscopic) of a diverticulum, which leads to contamination, inflammation, and infection. The spectrum of disease ranges from mild, uncomplicated diverticulitis that can be treated in the outpatient setting, to free perforation and diffuse peritonitis that requires emergency laparotomy. Most patients present with left sided abdominal pain, with or without fever, and leucocytosis. The most common location for diverticulitis is the sigmoid colon.

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      140.4
      Seconds
  • Question 15 - A 47-year old male comes to the out-patient department for a painful, right-sided...

    Incorrect

    • A 47-year old male comes to the out-patient department for a painful, right-sided groin mass. Medical history reveals a previous appendectomy 10 years prior. On physical examination, the mass can be reduced superiorly. Also, the mass extends to the scrotum. The initial diagnosis is a hernia.

      Among the types of hernia, which is the most likely diagnosis of the case above?

      Your Answer: Direct inguinal hernia

      Correct Answer: Indirect inguinal hernia

      Explanation:

      Inguinal hernias can present with an array of different symptoms. Most patients present with a bulge in the groin area, or pain in the groin. Some will describe the pain or bulge that gets worse with physical activity or coughing. Symptoms may include a burning or pinching sensation in the groin. These sensations can radiate into the scrotum or down the leg. It is important to perform a thorough physical and history to rule out other causes of groin pain. At times an inguinal hernia can present with severe pain or obstructive symptoms caused by incarceration or strangulation of the hernia sac contents. A proper physical exam is essential in the diagnosis of an inguinal hernia. Physical examination is the best way to diagnose a hernia. The exam is best performed with the patient standing. Visual inspection of the inguinal area is conducted first to rule out obvious bulges or asymmetry in groin or scrotum. Next, the examiner palpates over the groin and scrotum to detect the presence of a hernia. The palpation of the inguinal canal is completed last. The examiner palpates through the scrotum and towards the external inguinal ring. The patient is then instructed to cough or perform a Valsalva manoeuvre. If a hernia is present, the examiner will be able to palpate a bulge that moves in and out as the patient increases intra abdominal pressure through coughing or Valsalva.

      Groin hernias are categorized into 2 main categories: inguinal and femoral.

      Inguinal hernias are further subdivided into direct and indirect. An indirect hernia occurs when abdominal contents protrude through the internal inguinal ring and into the inguinal canal. This occurs lateral to the inferior epigastric vessels. The hernia contents may extend into the scrotum, and can be reduced superiorly then superolaterally. A direct inguinal hernia is protrusion of abdominal contents through the transversalis fascia within Hesselbach’s triangle. The borders of Hesselbach’s triangle are the inferior epigastric vessels superolaterally, the rectus sheath medially, and inguinal ligament inferiorly.

      A femoral hernia is a protrusion into the femoral ring. The borders of the femoral ring are the femoral vein laterally, Cooper’s ligament posteriorly, the iliopubic tract/inguinal ligament anteriorly and lacunar ligament medially.

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      92.7
      Seconds
  • Question 16 - The 'pump handle' movement of the thoracic wall describes which of the following movements:...

    Correct

    • The 'pump handle' movement of the thoracic wall describes which of the following movements:

      Your Answer: The anterior ends of the ribs moving upwards and forwards

      Explanation:

      Because the anterior ends of the ribs are inferior to the posterior ends, when the ribs are elevated, the anterior end moves upwards and forwards, moving the sternum upwards and forwards in turn. This ‘pump handle’ upwards and forwards movement changes the anteroposterior (AP) dimension of the thorax.

    • This question is part of the following fields:

      • Anatomy
      • Thorax
      107.2
      Seconds
  • Question 17 - Which of the following is a contraindication to the use of opioid analgesics: ...

    Correct

    • Which of the following is a contraindication to the use of opioid analgesics:

      Your Answer: Raised intracranial pressure

      Explanation:

      Opioids should be avoided in people who have:
      A risk of paralytic ileus (opioids reduce gastric motility)
      Acute respiratory depressionAn acute exacerbation of asthma (opioids can aggravate bronchoconstriction as a result of histamine release)
      Conditions associated with increased intracranial pressure including head injury (opioids can interfere with pupillary response making neurological assessment difficult and may cause retention of carbon dioxide aggravating the increased intracranial pressure)

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
      8287.6
      Seconds
  • Question 18 - A patient suffers an injury to the nerve that innervates gluteus medius.​
    The gluteus...

    Correct

    • A patient suffers an injury to the nerve that innervates gluteus medius.​
      The gluteus medius muscle is innervated by which of the following nerves? Select ONE answer only.

      Your Answer: Superior gluteal nerve

      Explanation:

      Gluteus minimus is innervated by the superior gluteal nerve.
      Gluteus medius is innervated by the superior gluteal nerve.
      Gluteus maximus is innervated by the inferior gluteal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      56.2
      Seconds
  • Question 19 - Which of the following clinical features would you NOT expect to see in...

    Correct

    • Which of the following clinical features would you NOT expect to see in a tibial nerve palsy:

      Your Answer: Weakened eversion of the foot

      Explanation:

      Damage to the tibial nerve results in loss of plantarflexion of the ankle and weakness of inversion of the foot resulting in a shuffling gait, clawing of the toes and loss of sensation in its cutaneous distribution.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      123.2
      Seconds
  • Question 20 - A 63-year-old man presents with severe abdominal pain and vomiting of blood. An...

    Correct

    • A 63-year-old man presents with severe abdominal pain and vomiting of blood. An endoscopy was performed and a peptic ulcer was found to have eroded into an artery nearby.

      Which of the following most likely describes the location of the ulcer?

      Your Answer: The posterior duodenum

      Explanation:

      The most common cause of upper gastrointestinal bleeding is peptic ulcer disease, particularly gastric and duodenal ulcers. Duodenal ulcers are most commonly associated with bleeding compared with gastric ulcers. Posterior duodenal ulcers are considered to be the most likely to cause severe bleeding because of its proximity to the branches of the gastroduodenal artery (GDA).

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      75.2
      Seconds
  • Question 21 - Which of the following is NOT a side effect of phenytoin: ...

    Incorrect

    • Which of the following is NOT a side effect of phenytoin:

      Your Answer: Gum hypertrophy

      Correct Answer: Ototoxicity

      Explanation:

      Adverse effects of phenytoin include:
      Nausea and vomiting
      Drowsiness, lethargy, and loss of concentration
      Headache, dizziness, tremor, nystagmus and ataxia
      Gum enlargement or overgrowth
      Coarsening of facial features, acne and hirsutism
      Skin rashes
      Blood disorders

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
      44.1
      Seconds
  • Question 22 - A 26-year-old athlete presents with buttock pain after tearing his gluteus maximus muscle.
    Which...

    Incorrect

    • A 26-year-old athlete presents with buttock pain after tearing his gluteus maximus muscle.
      Which of the following is NOT an action of the gluteus maximus muscle? Select ONE answer only.

      Your Answer: Hip extension

      Correct Answer: Hip abduction

      Explanation:

      Gluteus maximus is the main extensor muscle of the hip and assists with lateral rotation of the thigh at the hip joint. It also acts as a hip adductor, steadies the thigh, and assists in raising the trunk from a flexed position.
      Gluteus maximus is innervated by the inferior gluteal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      294.2
      Seconds
  • Question 23 - A 20-year-old patient had sustained a supracondylar fracture due to falling from a...

    Incorrect

    • A 20-year-old patient had sustained a supracondylar fracture due to falling from a skateboard. The frequency of acute nerve injuries accompanying supracondylar humeral fractures ranges from 10 to 20%. The most common complication is injury to which nerve?

      Your Answer: Musculocutaneous nerve

      Correct Answer: Median nerve

      Explanation:

      According to various studies, the frequency of acute nerve damage associated with supracondylar humeral fractures in children ranges from 10% to 20%.

      Median nerve injury and anterior interosseous nerve injury are the most common consequences.

      Damage to this nerve indicated weakening or abnormal extension of the index finger’s distal interphalangeal joint and the thumb’s interphalangeal joint. The absence of sensibility is a distinguishing attribute.

      A surgical neck humerus fracture may cause injury to the axillary nerve. A midshaft humerus fracture might cause injury to the radial nerve. A medial epicondylar fracture might cause injury to the ulnar nerve.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      358.1
      Seconds
  • Question 24 - Which of the following nerves supply the superficial head of the flexor pollicis...

    Incorrect

    • Which of the following nerves supply the superficial head of the flexor pollicis brevis muscle?

      Your Answer: The radial nerve

      Correct Answer: The recurrent branch of the median nerve

      Explanation:

      The two heads of the flexor pollicis brevis usually differ in their innervation. The superficial head of flexor pollicis muscle receives nervous supply from the recurrent branch of the median nerve, whereas the deep head receives innervation from the deep branch of the ulnar nerve, derived from spinal roots C8 and T1.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      113.7
      Seconds
  • Question 25 - Which of the following clinical features is most suggestive of a lesion of...

    Correct

    • Which of the following clinical features is most suggestive of a lesion of the occipital lobe:

      Your Answer: Homonymous hemianopia

      Explanation:

      Homonymous hemianopia is a visual field defect involving either the two right or the two left halves of the visual fields of both eyes. It is caused by lesions of the retrochiasmal visual pathways, ie, lesions of the optic tract, the lateral geniculate nucleus, the optic radiations, and the cerebral visual (occipital) cortex

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      66.1
      Seconds
  • Question 26 - Elevation of the eyeball is primarily produced by which of the following muscles:...

    Incorrect

    • Elevation of the eyeball is primarily produced by which of the following muscles:

      Your Answer: Superior rectus and medial rectus

      Correct Answer: Superior rectus and inferior oblique

      Explanation:

      Elevation of the eyeball is produced by the superior rectus and the inferior oblique muscles.

    • This question is part of the following fields:

      • Anatomy
      • Head And Neck
      44.8
      Seconds
  • Question 27 - Superficial fibular nerve palsy results in which of the following clinical features: ...

    Incorrect

    • Superficial fibular nerve palsy results in which of the following clinical features:

      Your Answer: Loss of inversion of the foot

      Correct Answer: Loss of eversion of the foot

      Explanation:

      Damage to the superficial fibular nerve results in loss of eversion of the foot and loss of sensation over the lower anterolateral leg and the dorsum of the foot.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      89.5
      Seconds
  • Question 28 - An 82 year old man has fever, left sided abdominal and back pain...

    Incorrect

    • An 82 year old man has fever, left sided abdominal and back pain and presents to the emergency room. Imaging reveals a large perinephric abscess. Which of the following most likely describes the fluid location:

      Your Answer: Between the renal cortex and the renal capsule

      Correct Answer: Between the renal capsule and the renal fascia

      Explanation:

      The perinephric fat is immediately external to the renal capsule and completely surrounds the kidney. The renal fascia surrounds the perinephric fat and the paranephric fat is external to the renal fascia. The location of a perinephric abscess is in the perinephric fat between the renal capsule and the renal fascia.

    • This question is part of the following fields:

      • Abdomen
      • Anatomy
      95.5
      Seconds
  • Question 29 - A tumour compresses the jugular foramen of a 50-year-old patient. Compression of several...

    Correct

    • A tumour compresses the jugular foramen of a 50-year-old patient. Compression of several nerves in the jugular foramen will result in which of the following complications?

      Your Answer: Loss of gag reflex

      Explanation:

      The glossopharyngeal nerve, which is responsible for the afferent pathway of the gag reflex, the vagus nerve, which is responsible for the efferent pathway of the gag reflex, and the spinal accessory nerve all exit the skull through the jugular foramen. These nerves are most frequently affected if the jugular foramen is compressed. As a result, the patient’s gag reflex is impaired.

      The vestibulocochlear nerve is primarily responsible for hearing. The trigeminal nerve provides sensation in the face. The facial nerve innervates the muscles of face expression (including those responsible for closing the eye). Tongue motions are controlled mostly by the hypoglossal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Cranial Nerve Lesions
      72.3
      Seconds
  • Question 30 - Which of the following statements is false regarding the biceps brachii muscle? ...

    Incorrect

    • Which of the following statements is false regarding the biceps brachii muscle?

      Your Answer: It receives its blood supply from the brachial artery

      Correct Answer: It pronates the radioulnar joint in the forearm

      Explanation:

      The biceps brachii muscle is one of the chief muscles of the arm. The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm. It derives its name from its two heads which merge in one unique distal body, defining the unusual structure of the muscle.

      The biceps brachii muscle is supplied by the musculocutaneous nerve (C5-C6), a branch of the brachial plexus.

      Arterial supply to the biceps brachii muscle varies considerably, coming from up to eight vessels originating from the brachial artery in the middle third of the arm.

      In the shoulder joint both muscle heads partially enforce opposite movements. The long head pulls the arm away from the trunk (abduction) and turns it inwards (inward rotation) whereas the short head pulls the arm back towards the trunk (adduction). When both heads contract simultaneously it leads to an arm bend (flexion). In the elbow joint the muscle bends the forearm (flexion) and rotates it outwards (supination). The supination is most powerful in a flexed elbow. In addition to the movement functions, the biceps has the important task to support the humeral head within the shoulder joint. Its antagonist is the triceps brachii in the posterior compartment of the arm.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      85.6
      Seconds

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