A&P 2 81 Muscles Test 1

Compresses cheek; moves food beneath teeth; suction for suckling

Buccinator

Wrinkles forehead, elevates eyebrow

Frontalis

Elevates and protracts mandible

Masseter

Elevates Scapula

Levator Scapulae

Moves scalp backward

Occipitalis

Closes eye

Orbicularis Oculi

Closes mouth, purses lips, speech

Orbicularis Oris

Depresses mandible and lower lip

Platysma

Extends neck, rotates and tilts head

Semispinalis capitis

Turns head to side, extends neck

Splenius capitis

Turns head to opposite side, bends neck laterally; if both sides contract together, flexes neck

Sternocleidomastoid

Elevates and retracts mandible

Temporalis

Extends head and neck, elevates, depresses and adducts scapula; rotates scapula upward

Trapezius

Smile

Zygomaticus major/minor

Flexes and medially rotates arm; abducts arm; extends and laterally rotates arm

Deltoid

Flattens to increase volume of thorax for inspiration

Diaphragm

Compresses abdomen, laterally flexes and rotates vertebral column

External abdominal oblique

Elevates ribs for inspiration

External intercostals

Depresses ribs for expiration

Internal intercostals

Extends, adducts and rotates arm medially

Latissimus dorsi

Flexes, adducts and rotates arm medially

Pectoralis major

Depresses and protracts shoulder

Pectoralis minor

Flexes vertebral column, compresses abdomen, depresses rib cage and stabilizes pelvis

Rectus abdominus

Rotates scapula upward and laterally

Serratus anterior

Flexes thigh at hip

Illiacus

Compresses abdomen, laterally flexes and rotates vertebral column

Internal Abdominal Oblique

Flexes thigh at hip; flexes vertebral column

Psoas Major

Compresses Abdomen

Transverse Abdominus

Maintain posture, extend vertebral column and head, laterally flex vertebral column and head

Erector Spinae

Downward rotation and adduction of scapula

Rhomboideus Major/Minor

Flexes forearm, supinates forearm

Biceps Brachii

Flexes elbow

Brachialis

Flexes elbow when arm is partially pronated, supinates forearm

Brachioradialis

Adducts, medially rotates and flexes humerus at shoulder

Coracobrachialis

Lateral rotation of humerus

Infraspinatus

Medially rotates humerus

Subscapularis

Abducts humerus

Supraspinatus

Extends, adducts, and medially rotates humerus (Bottom Muscle).

Teres Major

Lateral rotation and adduction of humerus (Top Muscle).

Teres Minor

Extends forearm

Triceps Brachii

Abducts and extends thumb

Abductor pollicis longus

Extends and abducts wrist (Wave)

Extensor carpi radialis brevis

Extends and abducts wrist (Wave)

Extensor carpi radialis longus

Extends and abducts wrist (Wave)

Extensor carpi ulnaris

Extends phalanges and hand

Extensor digitorum

Extends thumb

Extensor pollicis brevis

Extends thumb

Extensor pollicis longus

Flexes and abducts wrist (wave)

Flexor carpi radialis

Flexes and adducts wrist (wave)

Flexor carpi ulnaris

Flexes phalanges

Flexor digitorum profundus

Flexes phalanges

Flexor digitorum superficialis

Flexes thumb

Flexor pollicis longus

Flexes wrist

Palmaris longus

Pronates forearm

Pronator teres

Supinates forearm

Supinator

Adducts, flexes and laterally rotates thigh

Adductor longus

Adducts, flexes and laterally rotates thigh

Adductor magnus

Flexes knee, extend and lateral rotation of thigh at hip

Biceps femoris

Extends and rotates thigh laterally

Gluteus maximus

Abducts and rotates thigh laterally

Gluteus medius

Abducts and rotates thigh medially

Gluteus minimus

Adducts thigh, flexes lower leg

Gracilus

Extends leg at knee and flexes thigh

Rectus femoris

Flexes, abducts and laterally rotates thigh; flexes leg at knee

Sartorius

Flexes knee, extend and medial rotation of thigh at hip

Semimembranosus

Flexes knee, extend and medial rotation of thigh at hip

Semitendinosus

Flexes, abducts thigh

Tensor fasciae latae

Extends leg at knee

Vastus intermedius

Extends leg at knee

Vastus lateralis

Extends leg at knee (Teardrops)

Vastus medialis

Extends toes, dorsiflexes foot at ankle, evertion of foot

Extensor digitorum longus

Eversion of foot

Fibularis brevis

Eversion, plantar flexion of foot

Fibularis longus

Flexes toes, plantar flexion

Flexor digitorum longus

Plantar flexion and flexes digit 1

Flexor hallucis longus

Plantar flexes foot, flexes knee (Calves)

Gastrocnemius

Plantar flexes foot

Soleus

Dorsiflexes ankle, inverts foot

Tibialis anterior

Plantar flexion and inversion

Tibialis posterior