Feedforward activity of the cervical flexor muscles during voluntary arm movements is delayed in chronic neck pain

Falla, D, Jull, G and Hodges, PW (2004) Feedforward activity of the cervical flexor muscles during voluntary arm movements is delayed in chronic neck pain. Experimental Brain Research, 157 1: 43-48. doi:10.1007/s00221-003-1814-9


Author Falla, D
Jull, G
Hodges, PW
Title Feedforward activity of the cervical flexor muscles during voluntary arm movements is delayed in chronic neck pain
Journal name Experimental Brain Research   Check publisher's open access policy
ISSN 0014-4819
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1007/s00221-003-1814-9
Volume 157
Issue 1
Start page 43
End page 48
Total pages 6
Editor R F Schmidt
V J Wilson
Place of publication Germany
Publisher Springer-Verlag
Language eng
Subject C1
321024 Rehabilitation and Therapy - Occupational and Physical
730303 Occupational, speech and physiotherapy
Abstract The objective of this study was to compare onset of deep and superficial cervical flexor muscle activity during rapid, unilateral arm movements between ten patients with chronic neck pain and 12 control subjects. Deep cervical flexor (DCF) electromyographic activity (EMG) was recorded with custom electrodes inserted via the nose and fixed by suction to the posterior mucosa of the oropharynx. Surface electrodes were placed over the sternocleidomastoid (SCM) and anterior scalene (AS) muscles. While standing, subjects flexed and extended the right arm in response to a visual stimulus. For the control group, activation of DCF, SCM and AS muscles occurred less than 50 ms after the onset of deltoid activity, which is consistent with feedforward control of the neck during arm flexion and extension. When subjects with a history of neck pain flexed the arm, the onsets of DCF and contralateral SCM and AS muscles were significantly delayed (p<0.05). It is concluded that the delay in neck muscle activity associated with movement of the arm in patients with neck pain indicates a significant deficit in the automatic feedforward control of the cervical spine. As the deep cervical muscles are fundamentally important for support of the cervical lordosis and the cervical joints, change in the feedforward response may leave the cervical spine vulnerable to reactive forces from arm movement.
Keyword Neurosciences
Neck Muscle
Electromyography
Neck Pain
Postural Control
Low-back-pain
Transversus Abdominis
Limb Movement
Trunk
Contraction
Whiplash
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 13:07:48 EST