Muscle chart

Created by TA Manvitha Kalachagari for BSCI201.

frontal belly origin

epicranial aponeurosis

frontal belly insertion

eyebrow skin

frontal belly action

raises eyebrows

occipital belly origin

occipital bone

occipital belly insertion

epicranial aponeurosis

occipital belly action

pulls scalp posteriorly

orbicularis oculi origin

frontal bone

orbicularis oculi insertion

tissue of eyelid

orbicularis oculi action

closes eye

zygomaticus major origin

zygomatic bone

zygomaticus major insertion

skin at corner of mouth

zygomaticus major action

smiling

zygomaticus minor origin

zygomatic bone

zygomaticus minor insertion

skin at corner of mouth

zygomaticus minor action

smiling

orbicularis oris origin

maxilla

orbicularis oris insertion

lips

orbicularis oris action

closes lips

buccinator origin

maxilla

buccinator insertion

orbicularis oris

buccinator action

compresses cheek

masseter origin

zygomatic bone

masseter insertion

mandible

masseter action

prime mover of jaw closure

temporalis origin

temporal fossa

temporalis insertion

coronoid process of mandible

temporalis action

closes jaw

platysma origin

chest fascia

platysma insertion

mandible

platysma action

tenses skin of neck

sternocleidomastoid origin

clavicle

sternocleidomastoid insertion

mastoid process of temporal bone

sternocleidomastoid action

neck flexion

pectoralis major origin

clavicle

pectoralis major insertion

humerus

pectoralis major action

arm flexion

pectoralis minor origin

ribs

pectoralis minor insertion

coracoid process of scapula

pectoralis minor action

inferior scapular movement

serratus anterior origin

ribs

serratus anterior insertion

scapula

serratus anterior action

rotates scapula

deltoid origin

clavicle

deltoid insertion

deltoid tuberosity of humerus

deltoid action

prime mover of arm abduction

external intercostals origin

inferior border of rib above

external intercostals insertion

superior border of rib below

external intercostals action

pulls ribs together to elevate

internal intercostals origin

superior border of rib below

internal intercostals insertion

inferior border of rib above

internal intercostals action

pulls ribs together to depress

diaphragm origin

sternum

diaphragm insertion

central tendon

diaphragm action

inspiration

rectus abdominis origin

pubic crest

rectus abdominis insertion

xiphoid process

rectus abdominis action

rotates vertebral column and stabilizes pelvis during walking

external oblique origin

ribs

external oblique insertion

pubic crest

external oblique action

compresses abdominal wall

internal oblique origin

iliac crest

internal oblique insertion

pubic crest

internal oblique action

compresses abdominal wall

transversus abdominis origin

iliac crest

transversus abdominis insertion

pubic crest

transversus abdominis action

compresses abdominal contents

trapezius origin

occipital bone

trapezius insertion

acromion of scapula

trapezius action

adducts scapula

latissimus dorsi origin

spinous process of lumbar vertebrae

latissimus dorsi insertion

humerus

latissimus dorsi action

arm extension

infraspinatus origin

infraspinous fossa of scapula

infraspinatus insertion

greater tubercle of humerus

infraspinatus action

lateral arm rotation

teres minor origin

scapula

teres minor insertion

greater tubercle of humerus

teres minor action

lateral arm rotation

supraspinatus origin

supraspinous fossa of scapula

supraspinatus insertion

greater tubercle of humerus

supraspinatus action

initiates arm abduction

teres major origin

scapula

teres major insertion

humerus

teres major action

adducts arm

rhomboids major origin

spinous process of C7

rhomboids major insertion

scapula

rhomboids major action

stabilizes scapula

rhomboids minor origin

spinous process of C7

rhomboids minor insertion

scapula

rhomboids minor action

stabilizes scapula

triceps brachii origin

glenoid cavity of scapula

triceps brachii insertion

olecranon of ulna

triceps brachii action

extension of forearm

biceps brachii origin

coracoid process

biceps brachii insertion

radial tuberosity

biceps brachii action

flexion of forearm

brachioradialis origin

humerus

brachioradialis insertion

radial styloid process

brachioradialis action

synergist in forearm flexion

brachialis origin

humerus