10 Questions
What sensory loss is associated with a lesion just above the middle of the forearm?
In palmar aspects and nail beds of lateral 3½ fingers
What is the motor loss associated with a lesion at or just above the wrist?
Loss of opposition and weakness in abduction and flexion of thumb
What deformity is observed when the hand is at rest due to a lesion at or above the elbow?
Ape's hand deformity
Which muscles are supplied by the lateral division of the palmar cutaneous branch?
Three short muscles of the thumb (flexor pollicis brevis, abductor pollicis brevis, opponens pollicis)
Which nerve is formed by the union of the lateral root of the lateral cord and the medial root of the medial cord of the brachial plexus?
Median nerve
What causes motor loss due to carpal tunnel syndrome?
Lesion at or just above the wrist
At what point does the median nerve cross in front of the brachial artery?
Midarm
Where does the median nerve become superficial and lie deep to the tendon of palmaris longus?
Wrist
Which branch of the median nerve supplies the deep flexors of the forearm except the medial half of the flexor digitorum profundus?
Anterior interosseus branch
Through which structure does the median nerve enter the hand?
Carpal tunnel
Learn about the formation, course, and relations of the median nerve in the axilla, arm, and forearm. Understand its roots, trajectory alongside the brachial artery, and position in the cubital fossa.
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