Gross Muscle Anatomy

Frontalis

raises eyebrows

The frontalis...

Orbicularis oculi

closes eyes, squints, and blinks

The orbicularis oculi...

Orbicularis oris

closes mouth and protrudes lips

The orbicularis oris...

Buccinator

flattens the cheek and chews

The buccinator...

Zygomaticus

raises corners of mouth

The zygomaticus...

Masseter

closes jaw and elevates mandible

The masseter...

Temporalis

works with mandible to close jaw

The temporalis...

Platysma

pulls corners of mouth downards

The platysma...

Sternocleidomastoid

flexes neck and rotates head

The sternocleidomastoid...

Pectoralis major

adducts and flexes the humerus

The pectoralis major...

External intercostals

raise ribcage during inhalation

External intercostals...

Internal intercostals

deflates ribcage when exhaling

The internal intercostals...

Rectus abdominus

flexes vertebral column

The rectus abdominus...

External oblique

rotates trunk

The external oblique...

Internal oblique

rotates trunk

The internal oblique...

Transversus abdominus

compresses abdominal contents

The transversus abdominus...

Trapezius

elevates and adducts the scapula

The trapezius...

Rotator cuff

stabilizes humerus and pulls shoulder

The rotator cuff...

Latissimus dorsi

extends and adducts the humerus

The latissimus dorsi...

Erector spinae

causes back extension

The erector spinae...

Quadratus lumborum

flexes the spine

The quadratus lumborum...

Deltoid

abducts the arm

The deltoid...

biceps branchii

rotates forearm and flexes elbow

The biceps branchii...

Brachialis

flexes elbow

The branchialis...

Branchioradialis

flexes elbow

The branchiradialis...

Triceps branchii

extends elbow

The triceps branchii...

Flexor carpi radialis

flexes wrist

The flexor carpi radialis...

ulnaris

flexes wrist

The ulnaris...

Flexor digitorum

flexes fingers

The flexor digitorum...

Extensor carpi radialis

extends wrist

The extensor carpi radialis...

ulnaris extension

extends wrist

Ulnaris extension...

Extensor digitorum

extends fingers

The extensor digitorum...

Gluteus maximus

extends hip

The gluteus maximus...

Gluteus medius

abducts hip

The gluteus medius...

Iliopsoas

flexes hip

The iliopsoas...

Adductor muscles

adduct hip

The adductor muscles...

Biceps femoralis

extends hip and flexes knee

The biceps femoralis...

Semimembranosus

extends hip and flexes knee

The semimembranosus...

Semitendinosus

extends hip and flexes knee

The semiteninosus...

Rectus femoralis

extends knee

The rectus femoralis...

vastus medialis

extends knee

The vastus medialis...

Vastus intermedius

extends knee

The vastus intermedius...

Vastus lateralis

extends knee

The vastus lateralis...

Tibialis anterior

dorsiflextion and turning foot inwards

The tibialis anterior assists with...

Extensor digitorum longus

extends foot

The extensor digitorum longus...

Fibularis muscles

plantar flexion and turning foot outwards

Fibularis muscles assists with...

Soleus

plantar flexion

The soleus assists with...

Gastrocnemius

plantar flexion

The gastrocnemius assists with...