Nerve conduction velocity and cross-sectional area in ulnar neuropathy at the elbow.
INTRODUCTION
In the precise localization of ulnar neuropathy at the elbow (UNE) we have noted discrepancies between electrodiagnostic (EDx) and ultrasonographic (US) findings. We aimed to explore the relationship between the 2 techniques.


METHODS
Four study-blind examiners took a history and performed neurologic, EDx, and US examinations of a group of prospectively recruited patients with UNE. They assessed the relationship between ulnar nerve cross-sectional area (CSA) and motor nerve conduction velocity (MNCV).


RESULTS
In 106 patients with UNE at the retrocondylar (RTC) groove, the highest CSA and lowest MNCV were noted in the same short segment. In 54 patients with UNE at the humeroulnar aponeurosis (HUA), the highest CSA and lowest MNCV were noted proximal to the HUA.


DISCUSSION
MNCV and CSA were highly correlated in UNE. Ulnar nerve slowing proximal to the entrapment at the HUA was surprising, but consistent with previous studies done on carpal tunnel syndrome. Muscle Nerve 56: E65-E72, 2017.
['Podnar|Simon|S|', 'Omejec|Gregor|G|', 'Bodor|Marko|M|']
D000200:Action Potentials D000293:Adolescent D000328:Adult D000368:Aged D000369:Aged, 80 and over D004551:Elbow Joint D004568:Electrodiagnosis D005260:Female D006801:Humans D008297:Male D008875:Middle Aged D009431:Neural Conduction D011446:Prospective Studies D016037:Single-Blind Method D020424:Ulnar Neuropathies D055815:Young Adult
nerve conduction velocity ulnar neuropathy at the elbow nerve cross-sectional area nerve conduction studies ultrasonography