Abstract:
STUDY DESIGN:Spine proprioception and postural control in unstable sitting were compared in 18 chronic low back pain patients using a repeated measures design. OBJECTIVE:The study objective was to determine if stochastic resonance (SR) stimulation of the paraspinal muscles improves spine proprioception and trunk postural control. SUMMARY OF BACKGROUND DATA:Decreased spine proprioception and larger postural sway have been found in low back pain patients, although several studies have also shown no differences in spine proprioception. METHODS:Spine proprioception, measuring subjects' sensitivity to change in position, was assessed in 3 orthopaedic planes. Postural control was assessed using an unstable seat with a hemisphere attached to the bottom. Subjects balanced with eyes closed on the most challenging size hemisphere they could manage while center-of-pressure was recorded with a force plate beneath the seat. Both tasks were performed with SR stimulation randomized at 0%, 25%, 50%, and 90% intensity levels. RESULTS:No significant differences in spine proprioception were observed between SR stimulation levels for any of the 3 orthopaedic planes. SR stimulation significantly improved postural control, but only in the lateral plane. No differences in postural control were observed between stimulation levels 25%, 50%, and 90% in the lateral plane. There was no correlation between spine proprioception and postural control. CONCLUSION:Results suggest that SR stimulation to the paraspinal muscles can improve postural control; however, this improvement cannot be attributed to improved spine proprioception based on the current study. People with compromised neuromuscular control or those exposed to unstable environments may benefit from SR stimulation.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Reeves NP,Cholewicki J,Lee AS,Mysliwiec LWdoi
10.1097/BRS.0b013e3181971e09subject
Has Abstractpub_date
2009-02-15 00:00:00pages
316-21issue
4eissn
0362-2436issn
1528-1159pii
00007632-200902150-00003journal_volume
34pub_type
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