title: Effect of partial wrist denervation on wrist kinesthesia: wrist denervation does not impair proprioception.
abstract: OBJECTIVE
  To evaluate the potential effect of partial wrist denervation on wrist kinesthesia, we hypothesized that anesthetizing the anterior interosseous nerve and the posterior interosseous nerve does not impair the kinesthesia.
  
  
  METHODS
  We performed a double-blinded, prospective, randomized study on 80 healthy volunteers (20-54 y old) to compare the ability to detect active and passive wrist movement in 2 conditions. The test group received an anesthetic block of the anterior and posterior interosseous nerves, and the control group subjects received an injection of saline. The kinesthesia of the 2 groups was then tested in 2 conditions by measuring the error in an active and passive wrist repositioning task. Results were analyzed using a repeated measures analysis of variance.
  
  
  RESULTS
  In both active and passive conditions, there was no difference in the repositioning errors between the test group and the control group.
  
  
  CONCLUSIONS
  Our results show that kinesthesia is not impaired by blocking the anterior and posterior interosseous nerves. These findings are consistent for both active and passive motion. The study gives strong evidence that partial denervation does not impair wrist kinesthesia. However, because only kinesthesia was studied, we cannot conclude that partial denervation is a totally safe procedure for all aspects of proprioception.
  
  
  METHODS
  Therapeutic I.
authors.affiliation: Division of Orthopedic Research, Mayo Clinic, Rochester, MN 55905, USA.
authors.forename: Andre
authors.initials: A
authors.lastname: Gay
authors.forename: Kimberly
authors.initials: K
authors.lastname: Harbst
authors.forename: Diana K
authors.initials: DK
authors.lastname: Hansen
authors.forename: Edward R
authors.initials: ER
authors.lastname: Laskowski
authors.forename: Richard A
authors.initials: RA
authors.lastname: Berger
authors.forename: Kenton R
authors.initials: KR
authors.lastname: Kaufman
mesh_terms: D000328:Adult; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007699:Kinesthesis / Q000502:physiology*; D008012:Lidocaine / Q000008:administration & dosage; D008297:Male; D008875:Middle Aged; D009121:Muscle Denervation / Q000379:methods*; D011434:Proprioception / Q000502:physiology*; D011446:Prospective Studies; D016059:Range of Motion, Articular / Q000502:physiology*; D012016:Reference Values; D013647:Task Performance and Analysis; D014955:Wrist Joint / Q000294:innervation* / Q000502:physiology; D055815:Young Adult
chemical_list: D008012:Lidocaine