Origin, Insertion and Action of selected skeletal muscle Flashcards

1
Q

MASSETER:
origin
insertion
action

A

Zygomatic bone (arch)
Posterior 1/3 mandible
elevates mandible

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2
Q

TEMPORALIS:
origin
insertion
action

A

temporalis bone (fossa)
coronoid process of mandible
elevates mandible

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3
Q

DIGASTRIC:
origin
insertion
action

A

inferior mandible, temporal
hyoid bone
depresses mandible

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4
Q

STERNOCLEIDOMASTOID:
origin
insertion
action

A

manubrium and medial clavicle
mastoid process of temporal bone
(single,) rotate head to opposite side( both )flex head

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5
Q

RECTUS ABDOMINIS:
origin
insertion
action

A

Pubic symphysis
xiphoid process, costal cartilages of ribs 5-7
Flexes vertebral column, compresses abdomen

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6
Q

LATISSIMUS DORSI:
origin
insertion
action

A

dorsal spine (T7-sacrum) illiac crest
humerus (proximal 1/3)
extends arm, adducts and medially rotates arm

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7
Q

DELTIOID:
origin
insertion
action

A

clavicle, acromion process, spine of scapula
deltoid tuberosity of humerus
abducts arm

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8
Q

TRICEPS BRACHII:
origin
insertion
action

A

Scapula and humerus
olecranon process of ulna
extends forearm

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9
Q

PECTORALIS MAJOR:
origin
insertion
action

A

Clavicle, sternum, coastal cartilage of ribs 1-7
greater tubercle of humerus
Flexes arm; adducts and medially rotates arm

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10
Q

BICEPS BRANCHII:
origin
insertion
action

A

Coracoid process and supraglenoid tubercle of scapula
radial tuberosity
flexes forearm

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11
Q

ILLOPSOAS:
origin
insertion
action

A

Transeverse process of T12-L5; illiac fossa
lesser trochanter of femur
major flexor of thigh

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12
Q

SARTORIUS:
origin
insertion
action

A

anterior superior illiac spine
proximal tibia
flexes and laterally rotates thigh

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13
Q

QUADRICEPS FEMORIS MUSCLES:
origin
insertion
action

A

illium (rectus femoris) and femur
tibial tuberosity
Extends leg (rectus femoris and also flexes thigh)

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14
Q

HAMSTRINGS:
origin
insertion
action

A

ischial tuberosity
Head of fibula, proximal 1/3 tibia
extends thigh and flexes leg

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15
Q

GLUTEUS MAXIMUS:
origin
insertion
action

A

illiac crest, sacrum, coccyx
Proximal 1/3 femur
extends thigh

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16
Q

TIBIALIS ANTERIOR:
origin
insertion
action

A

Lateral condyle and upper 2/3 of tibia
metatarsal 1
dorsiflexion

17
Q

GASTROCNEMIUS:
origin
insertion
action

A

Condyles of femur
calcaneus
plantar flexes (extends foot)