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Question 1

Which spinal nerve provides motor fibers to the hand, and which myotome is formed?

Answer 1

The T1 spinal nerve provides motor fibers to the hand, forming the T1 myotome for intrinsic muscles.

Question 2

How does the median nerve enter the hand and what structures accompany it?

Answer 2

The median nerve enters the hand through the carpal tunnel along with nine tendons of the flexor digitorum superficialis (FDS), flexor digitorum profundus (FDP), and flexor pollicis longus (FPL).

Question 3

What does the median nerve supply in the hand?

Answer 3

The median nerve supplies two and a half thenar muscles, the 1st and 2nd lumbricals, and sends sensory fibers to the palmar surface and lateral three and a half digits.

Question 4

What branch of the median nerve supplies the central palm, and where does it originate?

Answer 4

The palmar cutaneous branch of the median nerve supplies the central palm and arises proximal to the flexor retinaculum, passing superficial to it.

Question 5

Through which canal does the ulnar nerve pass to reach the wrist?

Answer 5

The ulnar nerve passes through the ulnar (Guyon) canal to reach the wrist.