muscle actions

Question 1

finger/hand flexors

Answer 1

• flexor carpi ulnaris and flexor carpi radialis flex and abduct hand
• palmaris longus flexes hand
• flexor digitorum superficialis flexes hand and phalanges
• flexor digitorum profundus-flexes middle phalange

Question 2

finger/hand extensors

Answer 2

• extensor carpi radialis breves/longus and extensor carpi ulnaris extend and adduct hand
• extensor indicis extends fingers and hand
• extensor digitorum extends phalanges
• extensor digiti minimi extends prox phalange of minimus

Question 3

thenar muscles

Answer 3

• bump on palm @ thumb
• opponens pollicis (oposition)
• abductor pollicis breves
• flexor pollicis breves
• adductor pollicis

Question 4

hypothenar muscles

Answer 4

• bump on palm @ little finger
• abductor digiti minimi
• flexor digiti minimi breves
• opponens digiti minimi

Question 5

palmar interossei

dorsal interossei

Answer 5

• adduction of fingers (none on middle)

- abduction of fingers

Question 6

thumb

Answer 6

• flexor pollicis longus and breves

- extensor pollicis longus and breves

Question 7

pronators/supinators

Answer 7

• pronator teres (ulna)
• pronator quadratus
• supinator(radius)

Question 8

butt muscles

Answer 8

gluteus maximus: extension and lateral rotation
gluteus minimus: abduction and medial rotation
gluteus medius-abduction and medial rotation
tensor faciae latae-abduction and flexion

Question 9

abs

Answer 9

rectus abdominus-flexes lumbar vertebre
internal oblique-laterally rotates trunk
external oblique-laterally rotates trunk
transverse abdominus-laterally rotates trunk