title: Nerve conduction velocity and cross-sectional area in ulnar neuropathy at the elbow.
abstract: BACKGROUND
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Institute of Clinical Neurophysiology, University Medical Center Ljubljana, SI-1525, Ljubljana, Slovenia.
authors.forename: Simon
authors.initials: S
authors.lastname: Podnar
authors.affiliation: Institute of Clinical Neurophysiology, University Medical Center Ljubljana, SI-1525, Ljubljana, Slovenia.
authors.forename: Gregor
authors.initials: G
authors.lastname: Omejec
authors.affiliation: Department of Physical Medicine and Rehabilitation, University of California Davis, Sacramento, California, USA.|Department of Neurological Surgery, University of California San Francisco, San Francisco, California, USA.|Interventional Spine and Sports Medicine, Napa, California, USA.
authors.forename: Marko
authors.initials: M
authors.lastname: Bodor
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004551:Elbow Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D004568:Electrodiagnosis / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009431:Neural Conduction / Q000502:physiology*; D011446:Prospective Studies; D016037:Single-Blind Method; D020424:Ulnar Neuropathies / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D055815:Young Adult
keywords: nerve conduction studies; nerve conduction velocity; nerve cross-sectional area; ulnar neuropathy at the elbow; ultrasonography