Muscles Flashcards by Ava Alvarez

Origin of pectoralis major

Sternum, clavicle, 1-6 ribs

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Insertion of pectoralis major

Humerus

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Primary Action of pectoralis major

adducts/flexes humerus

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Origin of external oblique

lower 8 ribs

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Insertion of external oblique

iliac crest

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Primary actions of external oblique

flexes/rotates vertebral column

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Origin of rectus abdominis

pubis

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Insertion of rectus abdominis

sternum, 5-7 ribs

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Primary actions of rectus abdominis

flexes vertebral column

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Origin of adductor muscles

pelvis

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Insertion of adductor muscles

femur

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Primary actions of adductor muscles

adduct/medially rotate thigh

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Origin of sartorius

ilium

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Insertion of sartorius

tibia

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Primary actions of sartorius

flexes thigh on hip

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Origin of quadriceps group

vasti: femur; rectus femoris: pelvis

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Insertion of quadriceps group

tibial tuberosity via patellar ligament

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Primary actions of quadriceps group

all extend knee; rectus femoris flexes thigh on hip

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Origin of tibialis anterior

tibia

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Insertion of tibialis anterior

tarsal; 1st metatarsals

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Primary actions of tibialis anterior

dorsiflexes and inverts foot

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Origin of extensor digitorum longus

tibia & fibula

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Insertion of extensor digitorum longus

distal toes 2-5

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Primary actions of extensor digitorum longus

Plantar flex and evert foot

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Origin of frontalis

cranial aponeurosis

Insertion of frontalis

skin of eyebrows

Primary actions of frontalis

raises eyebrows

Origin of orbicularis oculi

frontal bone & maxillae

Insertion of orbicularis oculi

tissue around eyebrows

Primary actions of orbicularis oculi

blinks and closes eye

Origin of orbicularis oris

mandible & maxillae

Insertion of orbicularis oris

skin/muscle around mouth

Primary action of orbicularis oris

closes/protrudes lips

Origin of temporalis

temporal bone

Insertion of temporalis

mandible

Primary action of temporalis

closes jaw

Origin of zygomaticus

zygomatic bone

insertion of zygomaticus

skin/muscle at corner of lips

primary action of zygomaticus

raises corner of mouth

origin of masseter

temporal bone

insertion of masseter

mandible

primary action of masseter

closes jaw

origin of buccinator

maxillae & mandible near molars

insertion of buccinator

orbicularis oris

primary action of buccinator

compresses cheek, holds food between teeth

origin of sternocleidomastoid

sternum & clavicle

insertion of sternocleidomastoid

temporal bone (mastoid process)

primary action of sternocleidomastoid

flexes neck & laterally rotates head

origin of platysma

connective tissue covering of superior chest muscles

insertion of platysma

tissue around mouth

primary action of platysma

tenses skin of neck

origin of biceps brachii

scapula of shoulder girdle

insertion of biceps brachii

radius

primary action of biceps brachii

flexes elbow & supinates forearm

origin of brachialis

humerus

insertion of brachialis

ulna

primary action of brachialis

flexes elbow

primary action of arm/shoulder deltoid

abducts arm

origin of gluteus maximus

sacrum & ilium

insertion of gluteus maximus

femur

primary action of gluteus maximus

extend hips

origin of hamstring muscles

ischial tuberosity

insertion of hamstring muscles

tibia

primary action of hamstring muscles

abducts thigh & steadies pelvis

origin of gastrocnemius

femur

insertion of gastrocnemius

calcaneus

primary action of gastrocnemius

plantar flexes foot & flexes knee

origin of soleus

tibia & fibula

insertion of soleus

calcaneus

primary action of soleus

plantar flexes foot

origin of trapezius

occipital bone; thoracic & cervical vertebrae

insertion of trapezius

scapular spine & clavicle

primary action of trapezius

raises, retracts, and rotates scapula

origin of latissimus dorsi

lower spine & iliac crest

insertion of latissimus dorsi

humerus

primary action of latissimus dorsi

abducts humerus

origin of deltoid

scapular spine & clavicle

insertion of deltoid

humerus

primary action of deltoid

abducts humerus

origin of triceps brachii

shoulder girdle & humerus

insertion of triceps brachii

olecranon process of ulna

primary action of triceps brachii

extends elbow

origin of flexor carpi radialis

humerus

insertion of flexor carpi radialis

second and third metacarpals

primary action of flexor carpi radialis

flexes wrist & abducts hand

origin of flexor carpi ulnaris

humerus & ulna

insertion of flexor carpi ulnaris

carpals of wrist & fifth metacarpal

primary action of flexor carpi ulnaris

flexes wrist and adducts hand

origin of extensor carpi radialis

humerus

insertion of extensor carpi radialis

base of second and third metacarpals

primary action of extensor carpi radialis

extends wrist & abducts hand

Muscles Flashcards

(91 cards)