Hand and Wrist Flashcards
The flexor retinaculum is formed from which fascia?
Antebrachial fascia
What are the attachments of the flexor retinaculum?
Lateral - scaphoid
Medial - pisiform and hamate
The distal tendon of which muscle strengthens the flexor retinaculum?
Palmaris longus
The carpal tunnel is a combination of what?
Carpal bones (posteriorly) Flexor retinaculum (anteriorly)
What is contained within the carpal tunnel?
Tendon of FPL
Four tendons of FDS
Four tendons of FDP
Median nerve
In carpal tunnel syndrome, why is sensation of the central palm unaffected?
As the palmar cutaneous branch supplying it is given off proximal to the tunnel
The superficial palmar arch is formed from what?
Anastamosis of superficial palmar branches of ulnar and radial arteries
The deep palmar arch is formed from what?
Anastomosis of the deep branches of ulnar and radial arteries
Which fascia is affected in Dupuytren’s?
Palmar fascia
What are the four neurovascular bundles supplying each finger?
Medial palmar
Lateral palmar
Medial dorsal
Lateral dorsal
What is a ring block?
When anaesthetic is used in a ring around the base of the finger to anaesthetise all digital nerves
On the palmar aspect of the hand, the ulnar nerve supplies what?
Medial part of palm
Little finger
Medial half of ring finger
On the palmar aspect of the hand, the median nerve supplies what?
Central/lateral palm
Medial half of ring finger
First three digits
On the palmar aspect of the hand, the radial nerve supplies what?
Skin over base of thumb
The FDS, FDP and FPL tendons and their synovial sheaths travel distally through what?
Fibrous digital sheathes
Tenderness in the anatomical snuff box suggests what?
Scaphoid fracture
On the dorsum, what is supplied by the ulnar nerve?
Medial part of dorsum
Little finger
Medial half of ring finger
The median nerve supplies what on the dorsum?
Skin over distal phalanges/thumb of thumb, index finger and middle finger
The radial nerve supplies what on the dorsum?
Skin over anatomical snuffbox
Lateral part of dorsum
Proximal index, middle and lateral half of ring finger
The lumbricals attach between where?
FDP tendon and extensor expansion of the same digit
What are the actions of the lumbricals?
Flex MCPs
Extend PIPs
What nerves supply the lumbricals?
Ulnar - medial lumbricals (ring and little)
Radial - lateral lumbricals (middle and index)
The palmar interossei abduct the digits and the dorsal interossei adduct the digits. True/false?
False - palmar interossei adduct and dorsal interossei abduct
