UPPER LIMB ANATOMY

Question 1

Which nerve roots contribute to the brachial plexus?
A. C3-T1
B. C4-T2
C. C5-T1
D. C6-T4

Answer 1

C. C5-T1

The brachial plexus is formed by the anterior primary rami of C5 through T1 and provides sensory and motor innervation of the upper extremity. The brachial plexus is divided, proximally to distally into rami/roots, trunks, divisions, cords, and terminal branches.

Question 2

Which of the following statements best describes the scapula?
a. It usually overlies the 2nd to 9th ribs.
b. The spine continues laterally as the coracoid process.
c. The suprascapular notch is found on its spine.
d. It provides attachment for both heads of biceps
e. Most fractures involve the body.

Answer 2

D- Rationale: The long head of biceps takes origin from the supraglenoid tubercle and its tendon runs within the shoulder joint capsule in its own synovial sheath. The short head of biceps arises from the coracoid process via a conjoint tendon with coracobrachialis.