CBU A&P Practicum 2 - Heyman (muscles) corrected/reduced

depressor labii inferioris

sternocleidomastoid

origin- manubrium, clavicle

insertion- mastoid process

action- neck flexion (head the ball!)

digastric

origin- mandible

insertion- hyoid bone

action- opens mouth

trapezius

origin- spinous processes of vertebrae

insertion- spine of scapula

action- adduct scapula

external obliques

latissimus dorsi

origin- vertebrae, iliac crest

insertion- upper humerus

action- adducts arm

infraspinatus

semispinalis

teres minor

teres major

rhomboids

brachialis

erector spinae (more superficial than semispinalis) ?(addition?)

triceps brachii

origin- glenoid cavity, posterior humerus

insertion- olecranon process

action- extends forearm/elbow

biceps brachii

origin- coraciod process, glenoid cavity

insertion- radial tuberosity

action- flexes forearm/elbow

brachioradialis

pronator teres

flexor carpi radialis

palmaris longus

flexor carpi ulnaris

flexor digitorum superficialis

origin- medial epicondyle of humerus

insertion- phalanges 2-5

action- flexes fingers

extensor carpi ulnaris

extensor carpi radialis

extensor digitorum

origin- lateral epicondyle of humerus

insertion- phalanges 2-5

action- extends fingers

epicranius

orbucularis oculi

zygomaticus

Origin - zygomatic bone

Insertion- Obicularis Oris

Action- Smiling

depressor anguli oris

obicularis oris

mentalis

buccinators

masseter

origin- zygomatic bone

insertion- angle of mandible

action- chewing

platysma

pectoralis major

origin- clavicle, sternum

insertion- upper humerus

action- flexes & medially rotates arm

serratus anterior

deltoid

origin- clavicle, scapula

insertion- deltoid tuberosity of humerus

action- abduction of arm

pectoralis minor

(behind pectoral is major)

external intercostals

(outside like you can touch muscle)

internal intercostals

(on inside of rib cage)

diaphragm

rectus abdominis

origin- pubic crest

insertion- xiphoid process/costal cartilage

action- flexion of spine

internal obliques

gracilis

sartorius

adductor magnus

adductor longus

pectineus

rectus femoris

origin- acetabulum/ilium

insertion- patella/tibial tuberosity

action- extends lower leg/knew

gluteus maximus

vastus lateralis

vastus medialis

vastus intermedius

tensor fascia latae

(connects to IT band)

semimembranosus

(closest inside)

biceps femoris

origin- ischium and upper femur

insertion- head of fibula and condyle of tibia

action-flexes lower leg/knee

semitendinosus

FOUR QUADRICEP MUSCLES

Rectus femoris.

Vastus lateralis.

Vastus medialis.

Vastus intermedius

fibularis longus

gastrocnemius

origin-Medial and lateral condyles of femur

insertion- calcaneus

action-planter flexion

tibialis anterior

origin- Lateral condyle of tibia

insertion- metatarsals

action-dorsiflexion

soleus

flexor digitorum longus

flexor hallucis longus

THREE HAMSTRING MUSCLES

semitendinosus

semimembranosus

biceps femoris muscles