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19 terms

muscles

origins and actions
STUDY
PLAY
Rhomboid Major
Action: adduct scapula (scapulothoracic Joint)
elevate the scapula (STJ)
Downwardly rotate scapula (STJ)
Masseter
Elevates mandible
Assists in protracting the Mandible
Sternocleidomastiod (SCM)
Actions include neck flexion
Lateral Flexion s/s
rotate head o/s
assist in inhalation
Temporalis
elevate Mandible
retract Mandible
Occipitalis (occipitofrontalis)
anchor and retract galea aponeurotica
Frontalis (occipitofrontalis)
raise the eyebrows
wrinkle forehead
Platysma
depress Mandible
tighten fascia of neck
draw down corner of mouth
Rhomboid Minor
adduct the scapula (STJ)
elevate scapula
scapula
Teres Minor
lateral rotate the shoulder (G/H )
adduct the shoulder
stabilize the Humerus in Glenoid cavity
Supraspinatus
abduct the shoulder (G/H)
stablize head of Humerus in Glenoid Cavity
Levator Scapula
Unilaterally: elevate scapula
downwardly rotate scapula
laterally flex head and neck
Bilaterally: extend head and neck
rotate head and neck s/s
Latissimus Dorsi
extend shoulder (G/H)
adduct G/H
medially rotate G/H
Serratus Anterior
abduct the scapula
upwardly rotate scapula
depress scapula
hold medial border of the scapula against rib cage
Pectoralis Major
ALL FIBERS: adduct shoulder
Medial rotation
assist elevation during inhalation
UPPER FIBERS: flex shoulder
horizon adduction
LOWER FIBERS: extend shoulders
Teres Major
adduct shoulder G/H
extend G/H
Medially rotate G/H
Infraspinatus
laterally rotate shoulder (G/H)
adduct G/H
stablize the head of Humerus in Glenoid Cavity
Trapezius
Unilaterally: extend head and neck
lateral flexion of head and neck s/s
rotate head and neck o/s
elevate scapula
upwardly rotate
Subscapularis
medially rotate the shoulder (G/HJ)
stablize the head of Humerus in Glenoid cavity
Deltoid
ALL FIBERS: abduct shoulder (G/H)
ANTERIOR FIBERS: Flex G/H
medially rotate G/H
horizontally adduct G/H
POSTERIOR FIBERS: extend G/H
laterally rotate G/H
horizontally abduct