NEET PG Practice Quiz

Question 1

A newborn develops weakness after a difficult delivery with excessive separation of the head from the shoulder. The arm hangs by the side, is medially rotated, and the forearm is extended and pronated. Which part of the brachial plexus is most likely injured?

Accepted Answer

Upper trunk (C5–C6)

Question 2

A man falls from a height and grabs a branch overhead, after which he develops weakness of intrinsic hand muscles and clawing of the fingers. Which brachial plexus lesion best explains this finding?

Accepted Answer

Lower trunk lesion

Question 3

A patient sustains a lesion of the posterior cord proximal to its terminal branches. Which combination of deficits is most likely?

Accepted Answer

Loss of shoulder abduction with wrist drop

Question 4

In a lesion affecting the divisions of the brachial plexus behind the clavicle, which statement is anatomically correct?

Accepted Answer

It lies between trunks and cords and can affect fibers destined for multiple terminal nerves

Question 5

A patient has loss of elbow flexion and forearm supination after a penetrating injury to the axilla. Sensation over the lateral forearm is also reduced. Which cord of the brachial plexus is most likely injured?

Accepted Answer

Lateral cord