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ZOOLAB Exam 3

Muscles

QuestionAnswer
temporalis closes jaw
masseter closes jaw
buccinator compresses cheeks to hold food
splenius capitis extends neck, rotates and laterally flexes neck
semispinalis capitis extends head; extends and laterally flexes neck
iliocostalis extends vertebral column and neck, flexes vertebral column
longissimus extends vertebral column and neck; laterally flexes vertebral column
spinalis extends vertebral column
trapezuis Upper part extends head, elevates scapula; lower part depresses scapula
latissimus dorsi Extends, adducts arm
pectoralis major adducts and medial rotates the arm
pectoralis minor tilt the scapula anteriorly, draws ribcage superiorly
levator scapulae elevates scapula, pulls the clenoid cavity inferiorly
subscapularis medially rotates the arm, stabilizes shoulder joint
infraspinatus laterally rotates the arm, stabilizes shoulder joint
supraspinatus abducts and laterally rotates the arm
teres minor adducts, and laterally rotates arm, stabilizes shoulder joint
teres major adducts and medially rotates arm
serratus anterior abducts scapula, laterally rotates the scapula upward
rhomboid minor elevates scapula, adducts scapula, medially rotates scapula downward
rhomboid major elevates scapula, adducts scapula medially rotates scapula downward
external intercostalis elevates rib cage during inspiration
internal intercostalis depress ribcage during forced expiration
external oblique support and compress the abdomen; flex and laterally flexes vertebral column
internal oblique support and compress the abdomen; laterally flexes and rotates the vertebral column
rectus abdominis flex vertebral column anteriorly, increase intra-abdominal pressure
transversus abdominis compress abdomen, assist in forced expiration
deltoid abducts shoulder Anterior-flexion and medial rotation Middle-abduct arm Posterior-extension lateral rotation
biceps brachii flexes and supinates forearm
brachialis flexes forearm
triceps brachii extends forearm
pronator teres pronation
flexor digitorum superficialis flexes digits and
flexor carpi radialis flex and abducts wrist
flexor carpi ulnaris flex and adducts wrist
brachioradialis flexion at elbow
supinator supination
extensor digitorum extends fingers and wrist
extensor carpi radialis longus extends and abducts wrist
extensor carpi radialis brevis extends and abducts wrist
extensor carpi ulnaris extends and adducts wrist
sartorius flexes hip and knee
tensor fasciae latae tensor muscle, tenses thigh
iliopsoas flexes leg and hip
pectineus flexes thigh, adducts hip
rectus femoris extends knee; flexes hip
vastus medialis extends knee
vastus lateralis extends knee
gluteus maximus extends and laterally rotates thigh
gluteus medius abducts and medially rotates thigh
biceps femoris flexes knee; extends and laterally rotates hip
semimembranosus extends thigh, flexes knee
semitendinosus extends thigh, flexes knee
tibialis anterior flexion (dorsiflexion) at ankle; inverts foot
extensor digitorum longus extension of toes
extensor hallucis longus extension at great toe joint
fibularis longus everts foot and extends (plantar flexes) ankle
gastrocnemius extends (plantar flexes) ankle; inverts foot and flexes knee
soleus extends (plantar flexes) ankle
tibialis posterior adducts and inverts foot; extends (plantar flexes) ankle
flexor digitorum longus flexes toes
flexor hallucis longus flexes great toe
Created by: btuehara
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