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LP 2 Studies

Muscles and Function

orbicularis oculi closes eyes, blinking, squinting
zygomaticus raises lateral corners of mouth (smiling)
orbicularis oris closes mouth, purses lips (kissing)
platysma depresses mandible, pulls lower lip back and down
frontalis raises eyebrows, wrinkles skin of forehead
masseter closes jaw, elevates mandible
sternocleidomastoid flexes neck (together); rotates head toward opposite shoulder (individually)
digastric elevates hyoid, opens mouth, depresses mandible
deltoid prime mover of arm abduction
pectoralis major arm flexion, adducts and medially rotates arm
serratus anterior moves scapula forward
transversus abdominis compresses abdominal contents
internal and external obliques flexes vertebral column, fixes and depresses ribs, stabilizes pelvis during walking, aids in trunk rotation and lateral flexion
rectus abdominis flexes vertebral column, fixes and depresses ribs, stabilizes pelvis during walking
trapezius extends head, retracts scapula, elevates and depresses scapula (shrug shoulders)
teres major extends, medially rotates, and adducts humerus
latissimus dorsi prime mover of arm extension; adducts and medially rotates arm
supraspinatus assists in abduction of humerus; stabilizes shoulder
infraspinatus lateral rotation of humerus
erector spinae extends and abducts vertebral column
triceps brachii extension of forearm
biceps brachii flexion of forearm, supination of forearm
flexor carpi radialis wrist flexion, abducts hand
flexor carpi ulnaris wrist flexion, adducts hand
flexor digitorum superficialis flexes wrist and phalanges of fingers 2-5
flexor pollicis longus flexes thumb
extensor carpi ulnaris flexes thumb
extensor carpi ulnaris extends and adducts wrist
extensor carpi radialis extends and abducts wrist
extensor digitorum finger extension
extensor pollicis longus extends thumb
iliopsoas flex trunk on thigh, hip flexor
tensor fasciae latae flexes, abducts, and medially rotates thigh
sartorius flexes and laterally rotates thigh (cross-legged sitting)
quadriceps femoris identify the following as quadriceps: rectus femoris, vastus lateralis, vastus medialis
rectus femoris extends knee and flexes thigh at hip
vastus lateralis extends knee
vastus medialis extends knee
adductor longus adducts and medially rotates and flexes thigh
gracilis adducts thigh and medially rotates leg
gluteus maximus hip extensor, laterally rotates thigh
hamstrings indentify the following as hamstrings: biceps femoris, semitendinosus,
biceps femoris extends thigh, flexes knee, laterally rotates leg
semitendinosus extends thigh, flexes knee, medially rotates leg
gastrocnemius flexion of knee when foot is dorsiflexed
soleus plantarflexion of foot
flexor digitorum longus flexes toes; plantarflexes and inverts foot
popliteus flexes and medially rotates leg
peroneus longus plantarflexes and everts foot
flexor hallucis longus flexes great toe; pushes off when walking
tibialis posterior inversion and plantarflexion of foot
tibialis anterior dorsiflexes and inverts foot
extensor digitorum longus toe extension; dorsiflexes and everts foot
extensor hallucis longus extends great toe
Created by: 1448082520