muscles Flashcards
the muscle is connected to the bone by a
tendon
a band of connective tissue that holds
down the tendons at each wrist and ankle.
retinaculum
is the most
stationary, or fixed, end of the muscle. In the case of multiple origins, each origin is called a head.
origin
the end of the muscle attached to the bone undergoing the greatest movement
insertion
The part of the muscle between the origin and the insertion is the
belly
pectoralis
chest
gluteus
buttock
brachial
arm
raises the eyebrows
occipitofrontalis (ok-SIP-i-toh-fron-TAH-lis)
around the eyes. These muscles tightly close the
eyelids, and cause wrinkles in the skin at the lateral corners of the eyes
orbicularis oculi
- around the mouth
- closes and protrudes the lip
orbicularis oris
occipitofrontalis
raises eyebrow
compresses the cheeks inward
buccinator
depresses angle of the mouth
levator labii superioris
raises corner of mouth (smiling muscle)
zygomaticus
depresses corner of the mouth
depressor anguli oris
chewing
mastiction
Swallowing involves a number of structures and their associated muscles, including
(1) the hyoid
muscles, (2) soft palate, (3) pharynx (throat), and (4) larynx (voicebox)
depresses the tongue
genioglossus
elevates the tongue
styloglossus
rotates head and flex neck
sternocleidomastoid
extends and laterally flex the neck
trapezius
laterally rotates the neck
scalene