All muscles

Orbicularis oculi

Closes eyes

Zygomaticus

Raises corners of mouth (smiling)

Risorius

Draws corners of mouth laterally (“white person smile”)

Frontalis

Elevates eyebrows (surprised)

Corrugator supercilia

Draws eyebrows medially and inferiorly (angry)

Orbicularis oris

Closes lips in a pucker (kissing, whistling)

Depressor anguli oris

Depresses corners of mouth (frowning)

Mentalis

Wrinkles chin (pout)

Platysma

Tenses skin of neck (e.g. during shaving)

Buccinator

Compresses cheek (whistling, sucking)

Temporalis and Masseter

Closes jaw

Diaphragm

Inspiration

Intercostals

Elevates and depresses thoracic cage

Quadratus lumborum

Flexes vertebral column laterally

Transverse abdominis

Compresses abdomen

Rectus abdominis

Flex and rotate lumbar region

Interal oblique amd External oblique

Flex vertebral column, compress abdomen, and trunk rotation and lateral flexion

Brachioradialis

Synergist in forearm flexion

Pronator teres

Pronates forearm

Supinator

Assists biceps brachii to forcibly supinate forearm

Flexor digitorum superficialis

Flexes hand and middle phalanges of fingers 2 thru 5

Flexor carpi radialis

Powerful flexor of hand

Extensor digitorum

Prime mover of finger extension

Extensor carpi radialis longus

Extends and abducts hand

Deltoid

Prime mover of arm abduction

Pectoralis major

Prime mover of arm flexion; rotates arm medially; adducts arm

Latissimus dorsi

Prime mover of arm extension; adduction and medial rotation of arm (swimming, chin-ups)

Teres major

Extends, medially rotates, and adducts the arm

Biceps brachii

Flexes and supinates forearm

Triceps brachii

Powerful forearm extensor

Supraspinatus

Abduction of arm; stabilizes shoulder joint

Infraspinatus and Teres minor

Laterally rotates arm; stabilizes shoulder joint

Subscapularis

Medially rotates arm; stabilizes shoulder joint

Trapezius

Stabilizes, elevates, retracts, and rotates scapula (“shrugging shoulders”); extends head

Rhomboids

Stabilize scapula (“squaring shoulders”)

Levator scapulae

Elevates and adducts scapula

Serratus anterior

Rotates scapula upward; pushing, punching, “boxer’s muscle”

Gluteus maximus

Major extensor of thigh (climbing, running)

Gluteus medius

Abducts and medially rotates thigh (walking)

Biceps femoris, Semitendinosus, and Semimembranosus

Extends thigh and flexes leg

Pectineus, Adductors, and Gracilis

Adducts, flexes, and medially rotates thigh

Sartorius

Abducts, flexes, and laterally rotates thigh (cross-legged sitting)

Rectus femoris

Extends leg and flexes thigh

Vastus lateralis

Extends leg and stabilizes knee

Vastus medialis and Vastus intermedius

Extends leg

Fibularis longus

Plantar flexes and everts foot

Tibialis anterior

Prime mover of dorsiflexion and inverts foot

Extensor digitorum longus

Prime mover of toe extension and dorsiflexes foot

Flexor digitorum longus

Plantar flexes and inverts foot; flexes toes (helps foot “grip” the ground)

Soleus

Plantar flexes foot (postural muscle for walking, running, and dancing)

Gastrocnemius

Plantar flexes foot