Miscellaneous Hand

Question 1

creases of the hand

Answer 1

used all landmarks

distal palmar

proximal palmar

thenar crease

Question 2

distal palmar

Answer 2

the metacarpal heads are usually approximately 1 cm distal to this line

Question 3

proximal palmar crease

Answer 3

marks the location of the proximal pulley

part of the flexor mechanism

Question 4

thenar crease

Answer 4

delineates the thenar eminence

landmark for motion of the thumb

Question 5

creases are

Answer 5

areas where the skin is tact down to the underlying fascia

improves our grip

Question 6

tenodesis

Answer 6

the extrinsic finger tendons are passively shorted d/t changes in wrist position

joint motion will occur in fingers w/o any active contraction of finger muscles

Question 7

examples of tenodesis

Answer 7

wrist flexion –> passive tenson on finger extensor mechanism –> finger extension

wrist extension –> passive tension on finger flexion tendons –> finger flexion

Question 8

clinical implications of tenodesis

Answer 8

compensatory, hand use by individuals with injury (C6 spinal cord injury) or muscle weakness

must be careful when stretching patients

Question 9

role of wrist during hand activity

Answer 9

supports the hand in space (plus the weight of objects held in hand)

neutralizes the action of the extrinsic flexors and extensors of the fingers to prevent undesired wrist motion during hand movement

maintain optimal length of the extrinsic finger muscles during grasp

Question 10

role of wrist 2

Answer 10

when extending fingers –> wrist flexors must contract to prevent wrist extension

when flexing fingers –> wrist extensors contract to prevent wrist flexion

Question 11

role of wrist 3

Answer 11

wrist extensors neutralize the extrinsic finger flexors potential action at the wrist to prevent

1) active insufficiency of the extrinsic finger flexors

2) passive insufficiency of the extrinsic finger extensors

Question 12

anatomic snuffbox

Answer 12

anatomic landmark created by

tendons of ABD pollicis longus and extensor pollicis brevis radially and tendon of extensor pollicis longus ulnarly

floor is the scaphoid bone

Question 13

what is w/in the anatomical snuffbox

Answer 13

deep branch of radial artery

terminal branches of superficial radial nerve

Question 14

functional position of the hand

Answer 14

position from which optimal function is most likely to occur

Question 15

wrist functional position

Answer 15

20 degrees of extension

10 degrees of UD

Question 16

MCP optimal position

Answer 16

45 degrees of flexion

Question 17

PIP optimal position

Answer 17

30 degrees of flexion

Question 18

DIP optimal position

Answer 18

slight flexion

Question 19

thumb optimal position

Answer 19

CMC and MCP opposition

IP joint –> mild flexion