Learn: Anatomy Muscle Names: Head, Trunk, and Limb Origins, Insertions, Actions

frontalis

orbicularis oculi

O: medial margin of orbit

I: skin around eyelid

A: close eye

orbicularis oris

zygomaticus major

platysma

masseter

O: zygomatic arch

I: ramus of mandible

A: elevate mandible

temporalis

O: temporal bone

I: coronoid process of mandible

A: elevate mandible

sternohyoid

A: depress hyoid

sternothyroid

A: depress hyoid

thyrohyoid

digastric

mylohyoid

sternocleidomastoid

O: clavicle and manubrium

I: mastoid process of temporal bone

A: flex and rotate

scalenes

superior rectus

inferior rectus

medial rectus

lateral rectus

superior oblique

inferior oblique

external intercostals

A: respiration

diaphragm

O: xiphoid process, ribs, lumbar vertebrae

I: central tendon

A: inspiration

rectus abdominis

O: pubis

I: ribs

A: flexes vertebral column

external oblique

A: flexes vertebral colum and compresses abdomen

internal oblique

A: flexes vertebral column and compresses abdomen

transverse abdominus

A: compress abdomen

erector spinae

pectoralis major

O: ribs 2-6, sternum and clavicle

I: greater tubercle of humerus

A: adduction/medial rotation of humerus

trapezius

A: elevate, adduct, depress the scapula

deltoid

O: acromion process, spine of scapula and clavicle

I: deltoid tuberosity of humerus

A: abduction, extension and flexion of humerus

rhomboids

A: retract and adduct scapula

serratus anterior

A: protects scapula

levator scapulae

A: raise and abduct scapula

latissimus dorsi

O: thoracic, lumbar vertebrae, ribs 8-12, and thoracolumbar fascia

I: proximal humerus

A: adduction, medial rotation, and extension of humerus

teres major

O: inferior angle of scapula

I: medial surface of proximal humerus

A: extension, adduction, medial rotation of humerus

teres minor

supraspinatus

infraspinatus

subscapularis

biceps brachii

O: short head: coracoid process long head: above glenoid

I: radial tuberosity

A: flexion of forearm and supination

brachioradialis

A: flexes forearm at elbow; pronation and supination

triceps brachii

O: below glenoid, posterior surface of humerus

I: olecranon process of ulna

A: extends forearm at elbow joint and arm at shoulder joint

long head of triceps brachii

lateral head of triceps brachii

O:

I:

A:

medial head of triceps brachii

O:

I:

A:

palmaris longus

supinator

O: distal humerus

I: proximal radius

A: supination of wrist and hand

pronator teres

A: pronation of wrist and hand

flexor digitorum

extensor digitorum

thenar muscles

hypothenar muscles

iliopsoas

tensor fascia latae (including IT band)

gluteus maximus

O:

I:

A:

gluteus medius

O:

I:

A:

biceps femoris

O:

I:

A:

semimembranosus

semitendinosus

satorius

O:

I:

A:

rectus femoris

O:

I:

A:

Vastus lateralis

vastus medialis

Vastus intermedius

flexor digitorum longus

flexor hallucis longus

O:

I:

A:

tibialis posterior

peroneus longus

tibialis anterior

extensor digitorum longus

extensor hallucis longus

gracilis

O:

I:

A:

adductor longus

adductor femoris

gastrocnemius

O:

I:

A:

soleus

pectoralis minor

O: ribs 3-5

I: coracoid process

A: depress scapula

myofibril

14

sarcolemma

10

sacromere

11

I band

9

A band

15

transverse tubules

16

triad

17

sarcoplasmic reticulum

4

motor end plate of neuromuscular junction

12

myelin sheath

13

axon

orange tube thing

motor neuron

E

A band

F

I band

D

Z line

C

M line

A

motor neuron

B

motor end plate

C

neuromuscular junction

G

sarcolemma

H

endomysium