Arm Flashcards
What passes through the carpal tunnel?
Flexor pollicis longus, the four flexor digitorum superficialis and the four flexor digitorum profundus
Which digits does the median nerve innervate?
thumb and radial 2½ fingers
Most cases of carpal tunnel are idiopathic
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Which tests can be conducted to reproduce symptoms of carpal tunnel?
Tinel’s test: percussing over the median nerve
Phalen’s test: holding the wrists hyper‐flexed which decreases space in the carpal tunnel.
How do patients with carpal present?
parathesiae in the median nerve innervated digits which is usually worse at night
loss of sensation
weakness of the thumb or clumsiness in the areas of the hand supplied by the median nerve.
On examination there may be demonstrable loss of sensation and/or muscle wasting of the thenar eminence
Non-operative treatment for carpal tunnel syndrome?
use of wrist splints at night to prevent flexion. Injection of corticosteroid can also be used.
Surgical treatment for carpal tunnel syndrome?
Decompression involving division of the transverse carpal ligament under local anaesthetic
In cubital tunnel syndrome, what is compressed and where
ulnar nerve at the elbow behind the medial epicondyle
Which fingers does the ulnar nerve innervate?
ulnar 1½ fingers
In cubital tunnel syndrome what test is usually +ve? How is this performed
TInel’s
percussion over cubital tunnel
Which muscles of the hand are innervated by the ulnar nerve?
1st dorsal interosseous (abduction index finger) and adductor pollicis
What is Froment’s test?
Tests adductor pollicis function
patient is asked to hold a piece of paper between the thumb and a flat palm as the paper is pulled away
Where does compression usually happen in cubital tunnel syndrome?
tight band of fascia forming the roof of the tunnel
tightness at the intermuscular septum as the nerve passes through or between the two heads at the origin of flexor carpi ulnaris
What is the elbow joint composed of?
Humero ulnar joint and radio‐ capitallar joint
What is the humero-unlar joint responsible for?
flexion/extension