Question

A, stroke caused by a clot in a blood vessel of the brain, may lead to...

A, stroke caused by a clot in a blood vessel of the brain, may lead to a loss of function of certain muscles. Which motions would an individual be unable to perform if the following muscles lost function?

a. Orbicularis oculi m:

b. Sternocleidomastoid m:

c. Gluteus maximus m:

Science   Anatomy-And-Physiology   
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Answer #1

Loss of function of following muscles and their effect:

a. Orbicularis oculi muscle: Unable to close and squints eyes

b. Sternocleidomastoid muscle: Loss of flexion and rotation of head and neck

Sternocleidomastoid is the muscle of the neck (a muscle of head movement), its origin is at two muscle heads on the clavicle and sternum. The contraction of two sternocleidomastoid muscles of the neck causes flexion (decrease in the angle of a joint) of the head, it also aids in head rotation (side to side rotation).

c. Gluteus maximus muscle: Unable to cause flexion of leg, and eversion, plantar flexion of foot

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