-
epicranius frontalis (frontal belly)
raises eyebrows, wrinkles forehead
-
epicranius occipitus (occipital belly)
tenses and retracts scalp
-
obicularis oculi
closes eye
-
zygomaticus
retracts and elevates corner of mouth (smile)
-
orbicularis oris
compresses lips (kiss)
-
buccinator
compresses cheeks (whistle)
-
masseter
elevates mandible, moves jaw upward, shut mouth
-
temporalis
elevates mandible
-
digastric
depressed mandible (pulls mandible down), helps to move hyoid bone
-
platysma
depresses mandible and tenses skin of the neck
-
sternocleidomastoid
flex the neck, bends head up and face to opposite side
-
external intercoastals
elevates ribs for inspiration
-
internal intercoastals
depresses ribs for expiration
-
diaphragm
contraction expands thorax
-
external obliques
compresses abdomen/ flex, laterally rotate spine to opposite side
-
internal obliques
compresses abdomen/ flex, laterally rotate spine to same side
-
transverse abdominus
compresses abdomen
-
rectus abdominus
compresses abdomen/ flexes spine
-
pectoralis major
flexion, adduction and medial rotation of arm
-
pectoralis minor
protracts shoulder/ glenoid cavity moves inferiorly
-
serratus anterior
protracts shoulder/ glenoid cavity moves superiorly
-
trapezius
elevate, retract, depress, rotate scapula/ extend neck
-
deltoid
abduction or flexion or extension or rotation at the shoulder
-
teres major
extension and medial rotation at shoulder
-
teres minor
lateral rotation and adduction at shoulder
-
subscapularis
medial rotation at shoulder
-
infraspinatus
lateral rotation at shoulder
-
supraspinatus
abduction at shoulder
-
rhomboid major
adduct and inferior rotation of scapula
-
rhomboid minor
adduct and inferior rotation of scapula
-
latissimis dorsi
extension, adduction and medial rotation at shoulder
-
erector spinae
extension of spine (upright posture)
-
tendons
attaches mm to bone
-
aponeurosis
broad flat tendon
-
origin
stationary anchor/ proximal (close to the trunk)
-
insertion
attachment that moves during contraction/ distal end
-
skeletal muscle
striated, many nuclei, parallel fibers
-
cardiac muscle
striated, one nucleus, net like arrangement of fibers, intercerlated disc
-
smooth muscle
no striation, little spindle shaped, one nucleus
-
superficial fascia (hypodermis)
loose CT
-
deep fascia (mysiums)
dense/ coarse CT, wraps mm fibers
|
|
