Frontalis - Raises eyebrows, wrinkles skin of forehead horizontally
Occipitalis - Pulls scalp posteriorly
orbicularis oculi- Closes eye, pulls skin around the eyes (as in blinking and winking)
orbicularis oris- Closes and protrudes lips (as in puckering the lips for a kiss)
buccinator- Manipulates food during chewing Expels air through pursed lips (as in blowing a trumpet)
zygomaticus major- Pulls angle of mouth superiorly and laterally (as in smiling or laughing)
zygomaticus minor - Raises lateral portion of upper lip to expose upper teeth (as in smiling)
platysma- Lowers lower lip and opens mouth by depressing the mandible
massester- Elevates the mandible The masseter is the prime mover of jaw closure
temporalis - Elevates and retracts the mandible
digastric- Depresses mandible Fixator of the hyoid bone during swallowing
mylohyoid - Elevates hyoid bone and floor of mouth, assisting tongue to push food toward the pharynx
sternohyoid- Depresses hyoid bone and larynx
sternocleidomastoid- Bilateral (together) action: Flexes head (chin moves towards the chest) Unilateral (individual) action: Flex and rotate the head toward opposite side Accessory muscle of respiration
scalenes: Bilateral action: Flexes head Elevate rib cage with vertebral column during forced inspiration
anterior scalene- Unilateral action: Moves head laterally Accessory muscle of respiration
middle scalene- Unilateral action: Moves head laterally Accessory muscle of respiration
posterior scalene - Unilateral action: Moves head laterally Accessory muscle of respiration
trapezius- Elevates the scapula Rotates scapula upward Extends head
deltoid- Abducts the arm Secondarily flexes and extends arm
latissimus dorsi- Adducts and extends the arm Rotates arm medially
supraspinatus - Assists abduction of arm Holds the humerus and stabilizes the shoulder joint
infraspinatus- Laterally rotates the humerus Stabilizes shoulder joint
subscapularis - Adducts and rotates arm medially Stabilizes shoulder joint
teres minor - Laterally rotates the humerus Stabilizes shoulder joint
teres major- Adducts, extends and rotates arm medially
levator scapulae- Elevates scapula
rhomboid minor- Retracts scapula��
rhomboid major- Retracts scapula
splenius capitis- Extends the head Rotates the head to the same side as the contracting muscle
pectoralis major -Flexes and adducts the arm Rotates arm medially
pectoralis minor - Flexes and adducts the arm Rotates arm medially
serratus anterior -Protracts scapula Assists in upward rotation of scapula
diaphragm - Flattens to lower floor of thoracic cavity to increase volume and decrease pressure, thereby causing inspiration
external intercostals - Elevates rib cage, spreading the ribs, assisting in inspiration
internal intercostals- Depresses the rib cage, pulling ribs closer together, assisting in expiration
external oblique - Flexes and laterally bends the trunk Compresses abdominal cavity
internal oblique- Flexes and laterally bends the trunk Compresses abdominal cavity
transverse abdominus- Compresses abdominal cavity
rectus abdominus - Flexes the trunk, with the vertebral column fixed, compresses abdominal cavity
biceps brachii- Flexes elbow Supinates forearm
brachialis - Flexes elbow
triceps brachii - Extends elbow
pronator teres - Pronates forearm
flexor carpi radialis - Flexes the wrist Abducts the hand
palmaris longus - Flexes wrist Tenses dense connective tissue of palm
flexor carpi ulnaris - Flexes the wrist Adducts the hand
extensor carpi radialis longus - Extends the wrist Abducts the hand
extensor carpi radialis brevis - Extends the wrist Abducts the hand
extensor digitorum - Extends wrist Extends fingers
extensor digiti minimi - Extends little finger
extensor carpi ulnaris - Extends the wrist, Adducts the hand
branchioradialis - Flexes elbow
illiopsos- flexes thigh
illiacus - Flexes the thigh and stabilizes thigh in standing
psoas major - Flexes the thigh, laterally bends vertebral column
sartorius - Flexes, abducts and laterally rotates the thigh; flexes the leg at the knee
rectus femoris - Extends the knee and flexes the thigh
vastus lateralis - Extend the knee, stabilize the patella
vastus intermedius - Extends the knee
vastus medialis - Extend the knee, stabilize the patella
pectineus- Adducts, flexes and medially rotates the thigh
adductor longus - Adducts, medially rotates and flexes the thigh
adductor magnus - Adducts and medially rotates the thigh
adductor brevis - Adducts, medially rotates and flexes the thigh
gracilis - Adducts and medially rotates the thigh, flexes the leg
biceps femoris- Extends the thigh, flexes the knee
semitendinosus- Extends the thigh, flexes the knee
semimembranosus - Extends the thigh, flexes the knee
gluteus maximus - Extends, abducts and laterally rotates the thigh
gluteus medius - Abducts and medially rotates the thigh Stabilizes pelvis while walking
tensor fascia lata - Abducts, flexes and medially rotates the thigh
tibialis anterior- dorsiflexes the foot, inverts the foot
extensor digitorum longus - dorsiflexes the food, extends the toes
extensor hallucis longus- dorsiflexes the foot, extends the great toe
fibularis (peroneus) longus- everts the foot, plantar flexes the foot
fibularis (peroneus) brevis- Everts the foot, plantar flexes the foot
gastrocnemius- plantar flexes the foot, assists with flexing the knee
soleus- plantar flexes the foot
plantaris- plantar flexes the foot, assists with flexing the knee
flexor digitorum longus- flexes the toes, stabilizes foot
flexor hallucis longus- flexes the great toe