skeletal muscles origin, insertion, and movement

obicularis oris

O: maxilla and mandible

I: Corners of the mouth
M: Close mouth and shape lips

Orbicularis Oculi

O: Margin of orbit

I: eyelid

M: close/open eye

frontalis

O: fibourous sheet covering cranium

I: eyebrows and roots of nose
M: elevate eyebrows and draw scalp forward

Massater

O: zygomatic arch
I: mandible
M: chewing

Sternocleidomastoid

O: sternum/clavicle
I: mastoid process
M: rotate and flex the neck

biceps brachii

O: scapula
I: radius
M: Flex arm at elbow

triceps brachii

O: humerus/scapula
I: ulna
M: extending the arm at elbow

brachioradialis

O: humerus
I: radius
M: flex arm at elbow

extensor carpi radialis

O: humerus
I: metacarpal
M: extend the hand

extensor digitorum

O: humerus
I: digits
M: extend fingers

flexor digitorum

O: humerus

I: phlanges 2-5

M: flex fingers, wrist. and finger joints

flexor carpi radialis

O: humerus
I: carpal bones
M: flex and abduct the hand

iliopsoas

O: vertebrae T12-L4
I: femur
M: flex hip

sartorius

O: ilium
I: tibia
M: flex leg at knee

QUAD - rectus femoris

O: illium

I: tibia

M: extend thigh at knee, flex thigh at hip

QUAD - Vastus_____

O: femur

I: tibia

M: extend leg at knee

adductor muscles

O: pubis /ishium
I: femur
M: adduct thigh at hip

gluteus maximus

O: ilium, sacrum, coccyx

I: Femur

M: extend thigh at hip, rotate thigh laterally

HAMSTRING 1 - Bicep femoris

O: ishium, femur

I: tibia, fibula

M: flex leg at knee and extend thigh at hip

HAMSTRING 2 - Semitendinosus

O: ischium
I: tibia
M: flex leg at knee, extend thigh at hip

HAMSTRING 3 - Semimembranosus

O: ischium
I: tibia
M: flex leg at knee, extend thigh at hip

Tibialis Anterior

O: tibia
I: first metatarsal
M: dorsiflexing foot at ankle

Gastrocnemius

O: femur
I: calcaneus
M: plantarflexing

Soleus

O: fibula, tibia

I: calcaneus

M: plantar flexing the foot

Extensor Digitorum Longus

O: tibia/fibula
I: foot digits
M: extend toes

Deltoid

O: clavicle/scapula
I: humerus
M: abduct

Pectoralis Major

O: sternum/clavicle
I: humerus
M: flex

external oblique

O: lower ribs

I: ilium, pubis, linea Alba

M: flex and rotate vertebral column, compress abdomen

Rectus Abdominus

O: pubis
I: low ribs/ sternum
M: flex vertebral column

Trapezius

O: thoracic vertebrae and occipital bone
I: scapula
M: elevate

Rhomboid major and minor

O: cervical and thoracic vertebrae
I: scapula
M: elevate and adduct scapula

Latissimus Dorsi

O: thoracic and lumbar vertebrae
I: humerus
M: extend

Teres Major

O: scapula
I: humerus
M: extend and medially rotate arm

Rotator cuff

O: Scapula
I: humerus
M: rotate and abduct the shoulder