title: Effects of gender and age on median and ulnar nerve sensory responses over ring finger.
abstract: OBJECTIVE
  To analyze the effect of gender on median nerve (MN) and ulnar nerve (UN) sensorial responses over ring finger (RF).
  
  
  METHODS
  Results of individuals admitted to our ENMG laboratory between June 2011 and March 2012 for nerve conduction studies (NCSs) were retrospectively analyzed. Sensory NCSs were performed by standard antidromic technique.
  
  
  RESULTS
  Totally, 112 normal recordings belong to 100 patients were included. Mean antidromic sensory conduction velocity of MNs (wrist-to-second finger) or UNs (wrist-to-fifth finger) was not different between two genders. Mean sensory nerve action potential (SNAP) amplitude of MN from second finger was also not different between two genders. However, mean SNAP amplitude of UN from fifth finger was higher in females. In RF's sensorial response studies; mean peak latency of MN was similar between females and males (3.05±0.25ms vs. 3.14±0.29ms, p=0.111), whereas one of UN was shorter in females (2.86±0.22ms vs. 3.04±0.31ms, p=0.001). MN to UN latency difference to RF was greater in females than males (0.19±0.15ms vs. 0.10±0.16ms, p=0.007). Mean SNAP amplitude of MN and UN were both higher in females than males (17.9±7.1μV vs. 14.1±5.5μV, p=0.011 and 18.5±8.0μV vs. 12.9±6.1μV, p=0.0009, respectively). All data of NCSs were re-analyzed after adjustment for age, and obtained findings regarding effect of aging are also included.
  
  
  CONCLUSIONS
  Gender has a prominent effect on RF's sensorial responses. Normative values regarding them should be prepared with adjustment for gender.
authors.affiliation: Health Directory of Sakarya Province - Sakarya Sağlık Müdürlüğü, Valilik C-blok, 54290, Camili-2, Adapazarı, Sakarya, Turkey. Electronic address: dr.alemdar@gmail.com.
authors.forename: Murat
authors.initials: M
authors.lastname: Alemdar
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000375:Aging / Q000502:physiology*; D004576:Electromyography; D005260:Female; D005385:Fingers / Q000294:innervation*; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology*; D020423:Median Neuropathy / Q000503:physiopathology*; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000294:innervation; D009431:Neural Conduction / Q000502:physiology*; D011930:Reaction Time; D012016:Reference Values; D012189:Retrospective Studies; D012737:Sex Factors; D014459:Ulnar Nerve / Q000502:physiology*; D020424:Ulnar Neuropathies / Q000503:physiopathology*; D055815:Young Adult
keywords: Age; Gender; Median; Ring finger; Ulnar