title: Correlation of three different knee joint position sense measures.
abstract: OBJECTIVE
  The purpose of this study was to investigate correlation during concurrent measurement among three knee joint position sense (JPS) measures in sitting position and between two measures in standing position.
  
  
  METHODS
  Isokinetic dynamometer, electrogoniometer, and two dimensional (2D) video analysis were used for measuring knee JPS. The JPS was measured both in sitting and standing positions. All three measures were employed concurrently to measure knee JPS in sitting position; however, only the electrogoniometer and 2D video analysis were concurrently used in the standing position. The knee JPS was recorded in sitting position at 15 degrees, 30 degrees, and 45 degrees and in standing at high, mid and low knee flexion positions.
  
  
  RESULTS
  The results of the study suggest excellent correlation (0.94-0.98) between the electrogoniometer and 2D video analysis measures in standing position. In sitting position, good to excellent correlation (0.63-0.92) was found between the isokinetic dynamometer and electrogoniometer; however, fair to good correlation was found between 2D video analysis and either of the two measures (electrogoniometer [0.52-0.57] and isokinetic dynamometer [0.41-0.63].
  
  
  CONCLUSIONS
  Either 2D video or an electrogoniometer may be used to measure JPS in standing position; however, in sitting position 2D video should not be used if the camera is required to be placed at 10 degrees from the plane of motion.
authors.affiliation: Physical Therapy Program, University of Texas at El Paso, 1101, N Campbell Street, El Paso 79902, USA. dkiran@miners.utep.edu
authors.forename: Dayanand
authors.initials: D
authors.lastname: Kiran
authors.forename: Mary
authors.initials: M
authors.lastname: Carlson
authors.forename: Daniel
authors.initials: D
authors.lastname: Medrano
authors.forename: Darla R
authors.initials: DR
authors.lastname: Smith
mesh_terms: D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D053581:Muscle Strength Dynamometer; D011446:Prospective Studies; D014743:Videotape Recording; D055815:Young Adult