accessory structures of the hand

Question 1

extenosr retinacula

Answer 1

attach- radius, ulna, pisiform, triquetum, ulnar collateral ligament

mltiple septa- to allow all extensor tendons to cross in compartments

Question 2

flexor retinacula

Answer 2

attached to scaphoid, traqueteum, pisiform, hamate

prevent bowstring
converts into tunnel provides attachment for 6 tendons

Question 3

palmar apponeurosis

Answer 3

triangular shaped
superficial
extends from flexor retinacula

protect underlying structures
anchor skin
aids grip by increase surface area

Question 4

intertendinous connections

Answer 4

fibrous connection between bands of extensor digitorium

prevents indepent extension of one finger

Question 5

digital expansion

Answer 5

prevent independent extension
simulatainous expansion of ip joints

Question 6

fibrous flexor sheath

Answer 6

tunnels for flexor tendons in digits

act as a pulley for flexor tendons
prevent bow sring

increase efficeny and leverage

Question 7

synovial sheath flexor

Answer 7

double layered
friction free glide of tendons