Muscle Functions

Frontalis

elevates eyebrows

Corrugator supercilii

adducts eyebrows

Orbicularis oculi

closes eye

Orbicularis oris

closes mouth

Buccinator

compresses cheek

Zygomaticus

elevates corners of the mouth

Risorius

opens mouth laterally

Mentalis

pushes lower lip out

Masseter

elevates mandible

Temporalis

elevates mandible

Platysma

tenses anterior neck, depresses mandible, pulls lower lips laterally and inferiorly

Mylohyoid

elevates hyoid

Diagastric

elevates hyoid, depresses mandible

Stylohyoid

elevates and retracts hyoid

Sternocleidomastoid

flex neck

Sternohyoid

depresses hyoid

Pectoralis major

flexes, medially rotates and adducts arm

External abdominal oblique

lateral trunk rotation, abdominal compression

Internal abdominal oblique

lateral trunk rotation, abdominal compression

Transversus abdominis

abdominal compression

Rectus abdominus

flexes vertebral column

External intercostals

elevate ribs

Internal intercostals

depress ribs in forced expiration

Pectoralis minor

protracts and depresses scapula

Serratus anterior

protract scapula

Latissimus dorsi

extends, medially rotates and adducts arm

Trapezius

elevates and adducts scapula, extends neck

Deltoid

abducts arm

Levator scapulae

elevates scapula

Rhomboideus major & minor

adducts scapula

Supraspinatus

abducts arm

Infraspinatus

lateral arm rotation

Teres minor

lateral arm rotation

Subscapularis

medial arm rotation, stabilize humerus

Teres major

medial arm rotation, adducts arm

Biceps brachii

flexes elbow

Brachialis

flexes elbow

Brachioradialis

flexes elbow

Triceps brachii

extends elbow

Pronator teres

pronates forearm

Flexor carpi radialis

flexes and abducts wrist

Palmaris longus

flexes wrist

Flexor carpi ulnaris

flexes and adducts wrist

Extensor carpi radialis longus

extends and abducts wrist

Extensor carpi radialis brevis

extends and abducts wrist

Extensor digitorum

extends digits 2-5

Extensor digiti minimii

extends digit 5

Extensor carpi ulnaris

extends and adducts wrist

Sartorius

flexes thigh and flexes knee

Gluteus maximus

extends the thigh

Gluteus medius

abducts the thigh

Tensor fascia latae

abducts the thigh, extends the knee

Iliacus

flexes the thigh

Psoas major

flexes the thigh

Rectus femoris

extends the knee, flexes the thigh

Vastus lateralis

extends the knee

Vastus intermedius

extends the knee

Vastus medialis

extends the knee

Biceps femoris

extends the thigh, flexes the knee

Semimembranosus

extends the thigh, flexes the knee

Semitendinosus

extends the thigh, flexes the knee

Gracilis

adducts thigh, flexes knee

Pectineus

adducts thigh

Adductor longus

adducts thigh

Adductor magnus

adducts thigh

Gastrocnemius

plantar flexes foot

Plantaris

plantar flexes foot

Soleus

plantar flexes foot

Tibialis anterior

dorsiflexes and inverts foot

Extensor digitorum longus

flexes toes 2-5

Flexor digitorum longus

flexes toes 2-5

Tibialis posterior

inverts foot

Fibularis longus

everts foot

Fibularis brevis

everts foot