By Chris Faubel, MD –
A patient presents to your clinic with a very clear presentation of ulnar neuropathy at the elbow:
- numbness in the medial hand (palmar and dorsal surfaces and medial 1.5 digits), that is worse when talking on the phone and reading a book – basically all activities when his elbows are flexed 90 degrees or more
- note: if it was only the palmar surface, then the lesion would be more likely at the wrist, b/c the dorsal ulnar cutaneous nerve supplies the dorsal medial hand and branches off before the wrist — thus not involved in Guyon’s canal lesions
- NO paresthesias in medial forearm (b/c that would be from the medial antebrachial cutaneous nerve, and therefore a lower brachial plexus lesion)
