Human Anatomy Vol 1

UPPER LIMB

Anterior interosseous branch of median nerve

supplies 21/z muscles of front of the forearm, i.e.

flexor pollicis longus, pronator quadratus and

lateral half of flexor digitorum profundus.

Flexor retinaculum has a superficial slip medially

and a deep slip laterally. Deep to superficial slip

course ulnar nerve and vessels and superficial to

the deep slip passes the tendon of flexor carpi

radialis.

Thenar eminence does not include the adductor

pollicis muscle. It comprises abductor pollicis

brevis, flexor pollicis brevis and opponens

pollicis.

Median nerve supplies^5 muscles in the palm, three

muscles of thenar eminence and 1st and 2nd

lumbricals. It is called "Labourer's nerve". Median

nerve is also the "Eye of the hand".

Ulnar nerve is called "Musician's nerve". It

supplies 15 intrinsic muscles of the hand.

There are 12 muscles on the back of forearm, two

are smaller lying in upper 1, /4rh of the forearm,

five are inserted close to the wrist; five get inserted

into the phalanges. All are supplied by posterior

interosseous nerve, Injury to the nerve causes

"wrist dropt".

Lateral 31/znallbeds are supplied by median nerve

and medial T1/znailbeds by ulnar nerve.

Case 1

A young man practising tennis complained of severe

pain over lateral part of his right elbow. The pain

was pin pointed over his lateral epicondyle.

. \,Vhy does pain occur over lateral epicondyle
during tennis games?
. Which other games can cause similar pain?

the forearm. It can also oecur in swimming,

gymnastics, basketball, table tennis, i.e. any sport

Case 2

A S5-year-old woman complained of abnormal

sensations in her right thumb, index, middle and part

of ring fingers. Her pain increased during night.

There was weakness of her thumb movements.

o Which nerve was affected and where? Name the

syndrome.

is from palmar cutaneous branch of median nerve

1.

2.

MUITIPLE CHOICE AUESIIONS

Which of the following nerves leads to wrist drop? 4. Which of the following muscles is not supplied by

a. Ulnar median nerve?

b. Radiat a. Abductor pollicis brevis

c. Median b. Flexor pollicis brevis

d. Musculocutaneous c. Opponens pollicis

Nerve supply of adductor pollicis is: d. Adductor pollicis

a. Median nerve 5. Which of the following nerves is involved in carpal

b. Superficial branch of ulnar nerve tunnel syndrome?

c. Deep branch of ulnar nerve a' Ulnar b' Median

d. Radial nerve c. Radial d. Musculocutaneous

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Which of the following is the action of dorsal 6'

interosseous?

a. Abduction of fingers

b. Flexion of thumb

c. Adduction of fingers

d. Extension of metacarpophalangeal joints

Which of the following structures does not pass

through the carpal turmel?

a. Palmar cutaneous branch of median nerve

b. Median nerve

c. Tendons of flexor digitorum profundus

d. Tendon of flexor pollicis longus