43 terms

Anatomy: Muscles


Terms in this set (...)

origin is supraspinatus fossa of scapula and insertion is greater tubercle of humerus. helps prevent downward dislocation of humerus
flexes humerus, antagonist of supraspinatus
triceps brachii
extends arm at elbow
biceps brachii
powerful flexor of forearm; origin is glenoid process and coracoid process of scapula, insertion is radial tuberosity
flexes elbow
palmaris longus
flexes wrist
extensor carpi radialis
abducts wrist and flexes hand at wrist, origin is medial epicondyle of humerus, insertion is base of 2 and 3 metacarpals
rotates forearm laterally
abducts and laterally rotates femur, origin is iliac crest, insertion is proximal tibia/patella
adducts femur/thigh
rectus femoris
part of quadriceps group, extends leg at knee
vastus lateralis
part of quadriceps group, extends leg at knee
gluteus maximus
heaviest muscle in body, extends/straightens leg at hip during walking
biceps femoris
part of hamstrings group, flexes knee and extends thigh, rotates thigh laterally
part of hamstrings group
part of hamstrings group
plantar flexes foot, flexes leg at knee when foot is dorsiflexed
tibialis anterior
dorsiflexion and inversion of foot
plantar flexes the foot, origin is lateral surface of head of fibula, insertion is calcaneus
longissimus capitus
helps maintain posture, extends head and rotates face/head to same side
protrusion of fat or intestine from abdominal wall
abdominal aponeuroses
tendons of various abdominal muscles that interlace at midline
wiggle ears
orbicularis oculi
blink eye, smile
zygomaticus major
smiling muscle, raises corners of mouth upwards
orbicularis oris
spincter muscle used for "puckering up" and whistling
protrudes lower lip and wrinkles chin, sad
compresses cheek, allowing for rapid changes in volume of mouth cavity
sheet-like muscle in neck that pulls mouth (jaw) downward
changes size of nasal openings
opens jaw
rotates face to opposite side, laterally flexes head to same side, origin is manubrium of sternum, insertion is mastoid process of temporal bone
rectus abdominus
major spine flexor, forms 6 pack and translates to "straight muscle of abdomen"
external oblique
origin is lower 8 ribs, compresses abdomen; most external of abdominal muscles
internal oblique
compresses abdomen, middle layer; fibers point up to the head
transverse abdominus
compresses abdomen, deepest layer of ab muscles
linea alba
midline of chest where abdominal aponeuroses meet
serratus anterior
pulls scapula downward and forward
origins are occipital bone and spines of cervical/thoracic vertebrae. insertions are clavicle and spine/acromion process of scapula. elevates scapula, carries tension
rhomboid major
adducts scapula
pectoralis major
prime mover for shoulder flexion and adduction
latissimus dorsi
adducts and extends upper arm/shoulder, rotates humerus medially
prime mover for upper arm/shoulder abductor, flexes/extends humerus