Carpal Tunnel

Question 1

what forms the flexor retinaculum?

Answer 1

anterior fascia of the forearm thickening distally (transverse carpal ligament)

Question 2

what does the flexor retinaculum prevent?

Answer 2

bowstringing of the tendons during flexion

Question 3

what forms the carpal tunnel?

Answer 3

carpal bones posteriorly

flexor retinaculum anteriorly

Question 4

what does the carpal tunnel contain?

Answer 4

4 x FDS (flexor digitorum superficialis)
4 x FDP (flexor digitorum profundus)
FPL (flexor pollicis longus)
median nerve

Question 5

what causes the Hand of Benediction

Answer 5

median nerve lesion that is proximal to the carpal tunnel as the palmar cutaneous branch (which is outside the tunnel) is also affected

Question 6

what do median nerve palsies potentially present with?

Answer 6

ape hand
abnormal OK sign
hand of benediction

Question 7

what does the median nerve innervated?

Answer 7

thenar eminence and lateral 2 lumbricals

Question 8

what does the thenar eminence consist of?

Answer 8

abductor pollicis brevis
flexor pollicis
opponens pollicis