Individually rotation of the head to the opposite side. Together , flexion of the neck.
it flexes and rotates the head
Adduction of upper arm at the shoulder
The clavicle is referred to as the collar bone. The sternocleidomastoid is the muscle that starts at the mastoid process behind your ear and connects between your collar bone and sternum, giving you the ability to move your head up and down.
antagonist muscle
THe action of the digastric muscle is to depress the mandible or evaluate the larynx
The frowning action.
gdg
It represents contracting or shortening of a muscle.
rectus femoris
Reflex action
brachioradialis
a concentric muscle action.