Question

question 10
the sternocleidomastoid originates in the _______________ and inserts into the mastoid process.
a manubrium, clavicle
b coracoid process
c deltoid tuberosity
d scapula, clavicle
e brachialis

Explanation:

The sternocleidomastoid muscle has its origin at the manubrium of the sternum and the clavicle (sternal and clavicular heads) and inserts into the mastoid process. Option B (coracoid process) is related to shoulder muscles, C (deltoid tuberosity) is for deltoid muscle insertion, D (scapula, clavicle) is not the origin of sternocleidomastoid, and E (brachialis) is an arm muscle. So the correct origin is manubrium and clavicle.

Answer:

A. manubrium, clavicle