title: Slump Test: Effect of Contralateral Knee Extension on Response Sensations in Asymptomatic Subjects and Cadaver Study.
abstract: METHODS
  Part 1: A randomized, single-blind study on the effect of contralateral knee extension on sensations produced by the slump test (ST) in asymptomatic subjects. Part 2: A cadaver study simulating the nerve root behavior of part 1.
  
  
  OBJECTIVE
  Part 1: Test if contralateral knee extension consistently reduces normal stretch sensations with the ST.Part 2: Ascertain in cadavers an explanation for the results.
  
  
  BACKGROUND
  In asymptomatic subjects, contralateral knee extension reduces stretch sensations with the ST. In sciatica patients, contralateral SLR also can temporarily reduce sciatica. We studied this methodically in asymptomatic subjects before considering a clinical population.
  
  
  METHODS
  Part 1: Sixty-one asymptomatic subjects were tested in control (ST), sham, or intervention (contralateral ST) groups and their sensation response intensity compared.Part 2: Caudal tension was applied to the L5 nerve root of 3 cadavers and tension behavior of the contralateral neural tissue recorded visually.
  
  
  RESULTS
  Part 1: Reduction of stretch sensations occurred in the intervention group but not in control and sham groups (P ≤ 0.001).Part 2: Tension in the contralateral lumbar nerve roots and dura reduced in a manner consistent with the responses in the intervention (contralateral ST) group.
  
  
  CONCLUSIONS
  Part 1: In asymptomatic subjects, normal thigh stretch sensations with the ST reduced consistently with the contralateral ST, showing that this is normal and may now be compared with patients with sciatica.Part 2: Contralateral reduction in lumbar neural tension with unilateral application of tension-producing movements also occurred in cadavers, supporting the proposed explanatory hypothesis.
authors.affiliation: *Department of Physical and Rehabilitation Medicine, Kuopio University Hospital, Kuopio, Finland†Mercer University Physical Therapy Program, Atlanta, Georgia‡Ghent University, Ghent, Belgium§Amedisys Home Healthcare, Duluth, Georgia¶Gentiva Health Services, Seattle, Washington||Restore Health Group, Rosewell, Georgia**Neurodynamic Solutions, Adelaide, South Australia, Australia††Josip Juraj Strossmayer University of Osijek, Faculty of Medicine, Orthopaedic and Rehabilitation Hospital "Prim. dr.Martin Horvat", Rovinj, Croatia‡‡Department of Physical and Rehabilitation Medicine, Tampere University Hospital, Tampere, Finland§§Department of Orthopaedic, Traumatology and Hand Surgery, Kuopio University Hospital, Kuopio, Finland.
authors.forename: Michael
authors.initials: M
authors.lastname: Shacklock
authors.forename: Brian
authors.initials: B
authors.lastname: Yee
authors.forename: Tom
authors.initials: T
authors.lastname: Van Hoof
authors.forename: Russ
authors.initials: R
authors.lastname: Foley
authors.forename: Keith
authors.initials: K
authors.lastname: Boddie
authors.forename: Erin
authors.initials: E
authors.lastname: Lacey
authors.forename: J Bryan
authors.initials: JB
authors.lastname: Poley
authors.forename: Marinko
authors.initials: M
authors.lastname: Rade
authors.forename: Markku
authors.initials: M
authors.lastname: Kankaanpää
authors.forename: Heikki
authors.initials: H
authors.lastname: Kröger
authors.forename: Olavi
authors.initials: O
authors.lastname: Airaksinen
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007717:Knee / Q000502:physiology*; D017116:Low Back Pain / Q000503:physiopathology; D008161:Lumbosacral Region / Q000502:physiology*; D008297:Male; D052580:Muscle Stretching Exercises; D018482:Muscle, Skeletal / Q000502:physiology; D010808:Physical Examination; D013126:Spinal Nerve Roots / Q000502:physiology*; D055815:Young Adult