Vertical heterophoria and postural control in nonspecific chronic low back pain.

The purpose of this study was to test postural control during quiet standing in nonspecific chronic low back pain (LBP) subjects with vertical heterophoria (VH) before and after cancellation of VH; also to compare with healthy subjects with, and without VH. Fourteen subjects with LBP took part in th...

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Autores principales:	Eric Matheron, Zoï Kapoula
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a1114579b76c435ab52b20d887cfb458
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spelling	oai:doaj.org-article:a1114579b76c435ab52b20d887cfb4582021-11-18T06:56:31ZVertical heterophoria and postural control in nonspecific chronic low back pain.1932-620310.1371/journal.pone.0018110https://doaj.org/article/a1114579b76c435ab52b20d887cfb4582011-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21479210/?tool=EBIhttps://doaj.org/toc/1932-6203The purpose of this study was to test postural control during quiet standing in nonspecific chronic low back pain (LBP) subjects with vertical heterophoria (VH) before and after cancellation of VH; also to compare with healthy subjects with, and without VH. Fourteen subjects with LBP took part in this study. The postural performance was measured through the center of pressure displacements with a force platform while the subjects fixated on a target placed at either 40 or 200 cm, before and after VH cancellation with an appropriate prism. Their postural performance was compared to that of 14 healthy subjects with VH and 12 without VH (i.e. vertical orthophoria) studied previously in similar conditions. For LBP subjects, cancellation of VH with a prism improved postural performance. With respect to control subjects (with or without VH), the variance of speed of the center of pressure was higher, suggesting more energy was needed to stabilize their posture in quiet upright stance. Similarly to controls, LBP subjects showed higher postural sway when they were looking at a target at a far distance than at a close distance. The most important finding is that LBP subjects with VH can improve their performance after prism-cancellation of their VH. We suggest that VH reflects mild conflict between sensory and motor inputs involved in postural control i.e. a non optimal integration of the various signals. This could affect the performance of postural control and perhaps lead to pain. Nonspecific chronic back pain may results from such prolonged conflict.Eric MatheronZoï KapoulaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 3, p e18110 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Eric Matheron Zoï Kapoula Vertical heterophoria and postural control in nonspecific chronic low back pain.
description	The purpose of this study was to test postural control during quiet standing in nonspecific chronic low back pain (LBP) subjects with vertical heterophoria (VH) before and after cancellation of VH; also to compare with healthy subjects with, and without VH. Fourteen subjects with LBP took part in this study. The postural performance was measured through the center of pressure displacements with a force platform while the subjects fixated on a target placed at either 40 or 200 cm, before and after VH cancellation with an appropriate prism. Their postural performance was compared to that of 14 healthy subjects with VH and 12 without VH (i.e. vertical orthophoria) studied previously in similar conditions. For LBP subjects, cancellation of VH with a prism improved postural performance. With respect to control subjects (with or without VH), the variance of speed of the center of pressure was higher, suggesting more energy was needed to stabilize their posture in quiet upright stance. Similarly to controls, LBP subjects showed higher postural sway when they were looking at a target at a far distance than at a close distance. The most important finding is that LBP subjects with VH can improve their performance after prism-cancellation of their VH. We suggest that VH reflects mild conflict between sensory and motor inputs involved in postural control i.e. a non optimal integration of the various signals. This could affect the performance of postural control and perhaps lead to pain. Nonspecific chronic back pain may results from such prolonged conflict.
format	article
author	Eric Matheron Zoï Kapoula
author_facet	Eric Matheron Zoï Kapoula
author_sort	Eric Matheron
title	Vertical heterophoria and postural control in nonspecific chronic low back pain.
title_short	Vertical heterophoria and postural control in nonspecific chronic low back pain.
title_full	Vertical heterophoria and postural control in nonspecific chronic low back pain.
title_fullStr	Vertical heterophoria and postural control in nonspecific chronic low back pain.
title_full_unstemmed	Vertical heterophoria and postural control in nonspecific chronic low back pain.
title_sort	vertical heterophoria and postural control in nonspecific chronic low back pain.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/a1114579b76c435ab52b20d887cfb458
work_keys_str_mv	AT ericmatheron verticalheterophoriaandposturalcontrolinnonspecificchroniclowbackpain AT zoikapoula verticalheterophoriaandposturalcontrolinnonspecificchroniclowbackpain
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Vertical heterophoria and postural control in nonspecific chronic low back pain.

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