Vestibulospinal Reflex Activity in Patients with Adolescent Idiopathic Scoliosis:<i>Postural Effects During Caloric Labyrinthine Stimulation Recorded by Stabilometry</i>

Sahlstrand, Tage; Petruson, Björn; Örtengren, Roland

doi:10.3109/17453677908989768

Cited by 46 publications

(30 citation statements)

References 9 publications

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“…The type of curves was also shown to influence static and dynamic postural control in SCO [18] as well as body morphology was associated with standing imbalance in SCO [2]. Balance impairments in SCO girls was reported by Sahlstrand et al [36] and later associated with a deficit on a cerebral level [19], vestibular imbalance [37,38] and proprioceptive disorders [5,22]. Asymmetries in electromyographic responses of paraspinal muscles to postural disturbance were reported by Perret and Robert [34] in scoliotic children.…”

Section: Discussionmentioning

confidence: 86%

Free moment contribution to quiet standing in able-bodied and scoliotic girls

et al. 2007

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Adolescent idiopathic scoliosis girls are known to display standing imbalance. In addition to a motor deficit problem, the axial torsion of the spine and trunk torsion could reflect an imbalance around the vertical axis. Unlike the excursion of the center of pressure (COP), the forces and moments were rarely addressed to characterize the quiet standing balance. Nonetheless, one dynamical parameter, called free moment (T V ), representing the vertical torque on the feet can reflect the oscillation around the vertical axis associated to the standing imbalance. The objectives of this study were to test if the free moment variability can be utilized to characterize standing balance in a group of able-bodied and non-treated scoliotic girls and to determine if it was associated with that of the COP among each group of subjects tested. Forty-six adolescent girls with half of them presenting an adolescent idiopathic scoliosis were tested during quiet standing balance.Standing balance was assessed with the subjects standing upright and bare feet on a force plate. RMS and range of COP excursions and free moment were calculated.The scoliotic group displayed higher variability in COP excursion by about 24% than the able-bodied girls. Similarly, the T V RMS (P = 0.00136) and range (P = 0.00197) were statistically higher by about 42% in the scoliotic group. The variability of T V was associated with that of the COP in both groups. In the medio-lateral direction, the significant correlations between the RMS and range of the free moment and those of the COP were about 0.7 for the able-bodied group and 0.5 for the medio-lateral COP range for the scoliotic group girls. Along the antero-posterior axis, the only statistically significant correlations were observed for the scoliotic group. The free moment variability about the COP measured during quiet standing can be suggestive of an asymmetry control of the trunk around the vertical axis during standing balance. Its variability was more pronounced in scoliotic girls and was associated with the antero-posterior COP variability reflecting both biomechanical and motor control deficits. Free moment calculation could be a supplement insight into the standing balance of scoliotic subjects. Keywords Scoliosis Á Standing balance Á Free moment Abbreviations APAntero-posterior direction COM The center of mass is a point equivalent of the total body mass resulting from the location of each body segment COP The center of pressure is the location of the net ground reaction force. ML Medio-lateral direction x where X m is the arithmetic mean of the variable X. X i is the ith value of the variable X measured at the instant i, and N is the number of X i values

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Section: Discussionmentioning

confidence: 86%

Free moment contribution to quiet standing in able-bodied and scoliotic girls

et al. 2007

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“…A neurological origin has been postulated in particular since research showed that vestibular [10] or posterior column dysfunctions [1] are present in subjects with IS. A developmental abnormality in the central nervous system creating rib-vertebra angle asymmetry has also been postulated as a possible cause of IS [2].…”

Section: Introductionmentioning

confidence: 99%

Gait asymmetries in patients with idiopathic scoliosis using vertical forces measurement only

Schizas

Quervain

Stüssi

et al. 1998

European Spine Journal

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“…Yamada et al (1984) noted equilibrium dysfunction with abnormalities in proprioceptive and ocular reflex systems, and several reports (Sahlstrand & Petruson 1979a, b, Sahlstrand et al 1979 found dysfunction in labyrinthine or postural control mechanisms. These phenomena may be secondary to the existing spinal deformity, although if the observed disturbances are of etiologic importance in idiopathic scoliosis, the area implicated in the central nervous system would not be the subcortical structures, as suggested by the EEG studies, but the brain stem.…”

Section: Discussionmentioning

confidence: 99%