week 3/2 - HAND 2

Question 1

Distal attachments of the EHM

Answer 1

• anterior hand > pisiform, FCU. MC. 2,3. palmar aponeurosis
• middle phalanges
• posterior > MC 2,3. proximal pharynx thumb

Question 2

Intrinsic hand muscles

Answer 2

• have all their attachments within the hand
• THENAR > flexor pollicis brevis, abductor pollicis brevis, opponens pollicis
• HYPOTHENAR > flexor digiti minimi, abductor digiti minimi, opponens digit minimi,
• Lumbricals >1-4
  adductor pollicis > muscle on its own

Question 3

Abductor pollicis brevis

Answer 3

• flexor retinaculum - proximal phalynx of thumb
• superficial > lateral
  = abducts thumb at CMCJ 1, median nerve

Question 4

flexor pollicis brevis

Answer 4

• flexor retinaculum - proximal phalynx of thumb

Question 5

opponens pollicis

Answer 5

• flexor retinaculum - shaft MC1

Question 6

abductor digiti minimi

Answer 6

• flexor retinaculu, - proximal phalynx of little finger
  abducts little finger > radial nerve

Question 7

flexor digiti minimi

Answer 7

• flexor retinaculum > proximal phalynx of little finger
  flexes little finger at CMCJ 5, ulnar nerve

Question 8

opponens digiti minimi

Answer 8

• flexor retinaculum - metacarpal of little finger
  ulna nerve

Question 9

lumbricals 1-4

Answer 9

• lateral to medial

Question 10

dorsal interossei

Question 11

CARPAL TUNNEL REGION

Answer 11

6 layers
= a space in the proximal palmer aspect of the hand
- floor of the carpal bones < concave anteriorly

Question 12

lateral hand regions

Answer 12

• small region in the proximal hand on the lateral side of the thumb

Question 13

bounded by:

Answer 13

• anteriorly by tendons of abductor pollicis longus and extensor pollicis brevis and posteriorly by the tendon of extensor pollicis longus

Question 14

floor

Answer 14

• distal radius, scaphoid, trapezium, base metacapal 1