Non-orthopaedic limb trauma

Question 1

How are injuries to FDP and FDS distinguished?

Answer 1

FDS causes weakness of flexion at the PIP joint
FDP causes weakness of flexion at the DIP joint

Question 2

How are injuries to flexor carpi ulnaris and radialis distinguished?

Answer 2

Ulnaris aDducts (ulnar deviation) the hand
Radialis aBducts (radial deviation) the hand

Question 3

How does a median nerve injury at the wrist present?

Answer 3

sensation- lateral 3.5 digits volar aspect and the thenar eminence

Motor- FPB, Abductor PB, opponens policis and 1st/2nd lumbricals

Question 4

How does an ulnar nerve injury at the wrist present?

Answer 4

sensation- Medial 1.5 digits volar aspect, hypothenar eminence

Motor- weakness of adduction of fingers, flexion of wrist and thumb movements