Origin, Insertion and Action of selected skeletal muscle Flashcards
MASSETER:
origin
insertion
action
Zygomatic bone (arch)
Posterior 1/3 mandible
elevates mandible
TEMPORALIS:
origin
insertion
action
temporalis bone (fossa)
coronoid process of mandible
elevates mandible
DIGASTRIC:
origin
insertion
action
inferior mandible, temporal
hyoid bone
depresses mandible
STERNOCLEIDOMASTOID:
origin
insertion
action
manubrium and medial clavicle
mastoid process of temporal bone
(single,) rotate head to opposite side( both )flex head
RECTUS ABDOMINIS:
origin
insertion
action
Pubic symphysis
xiphoid process, costal cartilages of ribs 5-7
Flexes vertebral column, compresses abdomen
LATISSIMUS DORSI:
origin
insertion
action
dorsal spine (T7-sacrum) illiac crest
humerus (proximal 1/3)
extends arm, adducts and medially rotates arm
DELTIOID:
origin
insertion
action
clavicle, acromion process, spine of scapula
deltoid tuberosity of humerus
abducts arm
TRICEPS BRACHII:
origin
insertion
action
Scapula and humerus
olecranon process of ulna
extends forearm
PECTORALIS MAJOR:
origin
insertion
action
Clavicle, sternum, coastal cartilage of ribs 1-7
greater tubercle of humerus
Flexes arm; adducts and medially rotates arm
BICEPS BRANCHII:
origin
insertion
action
Coracoid process and supraglenoid tubercle of scapula
radial tuberosity
flexes forearm
ILLOPSOAS:
origin
insertion
action
Transeverse process of T12-L5; illiac fossa
lesser trochanter of femur
major flexor of thigh
SARTORIUS:
origin
insertion
action
anterior superior illiac spine
proximal tibia
flexes and laterally rotates thigh
QUADRICEPS FEMORIS MUSCLES:
origin
insertion
action
illium (rectus femoris) and femur
tibial tuberosity
Extends leg (rectus femoris and also flexes thigh)
HAMSTRINGS:
origin
insertion
action
ischial tuberosity
Head of fibula, proximal 1/3 tibia
extends thigh and flexes leg
GLUTEUS MAXIMUS:
origin
insertion
action
illiac crest, sacrum, coccyx
Proximal 1/3 femur
extends thigh
