Hand and wrist anatomy 2

Question 1

what are tendon pulleys

Answer 1

tendons that run down our fingers are held in place by a series of ligaments, that arch over the tendons forming a “tunnel-like” sheath

Question 2

tendon pulleys prevent

Answer 2

“bowstringing” during flexion of the finger (they are stabilizers)

Question 3

what is tenosynovium

Answer 3

slippery coating to pulleys that surrounds the tendons and keeps the tendons moving smoothly under the ligaments when the hand grasps objects.

Question 4

annular pulleys prevent

Answer 4

palmar tendon dislocations

Question 5

which annular pulleys are most commonly affected

Answer 5

A2 and A4

Question 6

are cruciform pulleys seen well on ultrasound

Answer 6

no

Question 7

collateral ligaments of the fingers prevent

Answer 7

abnormal sideways bending

Question 8

median nerve can easily be seen in

Answer 8

carpal tunnel and in cubital fossa of elbow

Question 9

ulnar nerve can be seen where

Answer 9

medially in the wrist and posteriorly in the elbow

Question 10

radial nerve can be seen where

Answer 10

wrist and anterolaterally in elbow

difficult to see

Question 11

what is the flexor retinaculum

Answer 11

A strong fibrous band crossing the front of the carpus and binding down the flexor tendons of the digits and the tendon of the radial flexor muscle of the wrist.

Question 12

contents of the guyon tunnel

Answer 12

ulnar nerve

ulnar artery

Question 13

borders of the guyon tunnel (3)

Answer 13

transverse carpal ligament/flexor retinaculum: posterior
superficial palmar ligament : anterior
Pisiform and Hamate: medially

Question 14

is there communication between median nerve and ulnar nerve

Answer 14

yeees through their branches

Question 15

radial nerve location

Answer 15

radial aspect of wrist

crosses the 1st extensor compartment to reach the dorsal wrist

Question 16

is there communication between radial and ulnar nerves?

Answer 16

yup through the branches on the dorsal surface of the hand