Lab Practical Flashcards
Action of the frontal belly
Raises eyebrows
Action if the orbicularis oculi
Closes eye
Action of the zygomaticus
Raises lateral corners of mouth
Action of the orbiculares oris
Closes lips
Action of the platysma
Tenses skin of neck; pulls over lip back and down
Action of the masseter
Prime mover of jaw closure
Action of the digastric
Elevate hyoid bone; open mouth and depress mandible
Action of the sternocleidomastoid
Rotate head toward shoulder on opposite side
Action of the erector spinae
Extend and bend the vertebral column laterally; fibers of the longissimus also extend and rotate
Action of the pectorals major
Arm flexion; adducts, medially rotates arm
Action of the serrates anterior
To protract and hold scapula against chest wall; rotates scapula
Action of the deltoid
Acting as a whole, prime mover of arm abduction
Action of the rectus abdominis
Fixes and depresses ribs; stabilizes pelvis during walking
Action of the internal oblique
As for external oblique
Action of the transversus abdominis
Compress abdominal contents
Action of the trapezius
raises, rotates, and retracts (adducts) scapula and stabilizes it; (as in shrugging the shoulders)
Action of the latissimus dorsi
Prime mover of arm extension: adducts and medially rotates arm
Action of the infraspinatus
Lateral rotation of arm
Action of the teres major
Extends, medially rotates, and adducts arm
Action of the supraspinatus
Initiates abduction of arm; stabilizes shoulder joint
Action of the triceps brachii
Powerful forearm extensor
Action of the biceps brachii
Flexion (powerful) and supination of forearm
Action of the flexor carpi radialis
Powerful flexor and abductor of the hand
Action of the flexor carpi ulnaris
Flexes and adducts hand
Action of the flexor digitorum superficialis
Flexes hand and middle phalanges of fingers
Action of the flexor pollicis longus
Flexes thumb
Action of the extensor carpi radials longus
Extends and abducts hand
Action of the extensor digitorum
Prime mover of finger extension; extends hand
Action of the extensor carpi ulnaris
Extends and adducts hand
Action of the extensor policies longus
Extends thumb
Action of the iliopsoas - iliac and psoas major
Flex trunk at hip joint, flex thigh: lateral flexion of vertebral column
Action of the sartorius
Flexes, abducts, and laterally rotates thigh: flexes leg
Action of the adductor longus
Adduct and medially rotate and flex thigh
Action of the gracilis
Adducts thigh; flexes and medially rotates leg
Action of the rectus femoris
Extends leg and flexes thigh
Action of the vastus lateralis
Extends leg and stabilizes knee
Action of the vests medialis
Extends leg; stabilizes patella
Action of the tensor fascia lata
Flexes, abducts, and medially rotates thigh
Action of the glues maximus
Laterally rotates and abducts thigh
Action of the biceps femoris
Extends thigh; laterally rotates leg; flexes leg
Action of the tibialis anterior
Dorsiflexion; inverts foot
Action of the extensor digitorum longus
Toe extension; dorsiflexes foot
Action of the extensor hallucis longus
Extends great toe