Changes in head and neck position affect elbow joint position sense

Knox, JJ and Hodges, PW (2005) Changes in head and neck position affect elbow joint position sense. Experimental Brain Research, 165 1: 107-113. doi:10.1007/s00221-005-2293-y

Author Knox, JJ
Hodges, PW
Title Changes in head and neck position affect elbow joint position sense
Journal name Experimental Brain Research   Check publisher's open access policy
ISSN 0014-4819
Publication date 2005-01-01
Year available 2005
Sub-type Article (original research)
DOI 10.1007/s00221-005-2293-y
Open Access Status Not Open Access
Volume 165
Issue 1
Start page 107
End page 113
Total pages 7
Editor R.F. Schmidt
V.J. Wilson
Place of publication Berlin
Publisher Springer-Velag
Language eng
Subject C1
321403 Motor Control
730303 Occupational, speech and physiotherapy
Abstract Changes in the position of the head and neck have been shown to introduce a systematic deviation in the end-point error of an upper limb pointing task. Although previous authors have attributed this to alteration of perceived target location, no studies have explored the effect of changes in head and neck position on the perception of limb position. This study investigated whether changes in head and neck position affect a specific component of movement performance, that is, the accuracy of joint position sense (JPS) at the elbow. Elbow JPS was tested with the neck in four positions: neutral, flexion, rotation and combined flexion/rotation. A target angle was presented passively with the neck in neutral, after a rest period; this angle was reproduced actively with the head and neck in one of the test positions. The potential effects of distraction from head movement were controlled for by performing a movement control in which the head and neck were in neutral for the presentation and reproduction of the target angle, but moved into flexion during the rest period. The absolute and variable joint position errors (JPE) were greater when the target angle was reproduced with the neck in the flexion, rotation, and combined flexion/rotation than when the head and neck were in neutral. This study suggests that the reduced accuracy previously seen in pointing tasks with changes in head position may be partly because of errors in the interpretation of arm position.
Keyword Neurosciences
Upper Limb
Galvanic Vestibular Stimulation
Pointing Movements
Coordinate System
Visual Targets
Arm Movements
Q-Index Code C1
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 15:34:38 EST