Electromyographic activity of erector spinae and external oblique muscles during trunk lateral bending and axial rotation in patients with adolescent idiopathic scoliosis and healthy subjects

Farahpour, Nader; Younesian, Hananeh; Bahrpeyma, Farid

doi:10.1016/j.clinbiomech.2015.03.018

Cited by 32 publications

(35 citation statements)

References 32 publications

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“…Peak head, trunk and pelvis inclination evoked by GVS over the later part of the response was also not different between stimulus polarities. These results confirm previous research revealing symmetrical responses of the bilateral axial muscles to unexpected balance perturbations (Farahpour et al., ; Kuo et al., ) despite the asymmetric activation of the same muscles in posture (Cheung, Veldhuizen, Halberts, Sluiter, & Horn, ; Farahpour et al., ; Kuo et al., ; de Oliveira et al., ). Based on this evidence, it is suggested that in AIS patients, any slight imbalance in the descending vestibulospinal drive depicted in the short‐ and medium‐latency responses of the ankle muscles is compensated by motion‐related feedback from the weight‐bearing (load‐related) receptors of the lower limbs during the late response phase.…”

Section: Discussionsupporting

confidence: 91%

“…Human studies have confirmed that AIS patients adopt an asymmetric posture (Dalleau et al., ) and show asymmetric activation of the axial muscles (Cheung et al., ; Farahpour, Younesian, & Bahrpeyma, ; de Oliveira, Gianini, Camarini, & Bevilaqua‐Grossi, ) with increased EMG activation in the convex side (Cheung et al., ; Farahpour et al., ; Kuo, Hong, Lai, & Tan, ). It is not clear, however, whether this asymmetry reflects a vestibular imbalance or alternatively is an adaptation to the spine deformity.…”

Section: Introductionmentioning

confidence: 89%

“…Despite the asymmetric habitual muscle activation for postural control, AIS patients react with synchronized and symmetrical recruitment of the bilateral postural muscles to unexpected balance perturbations. This suggests that the asymmetry in posture is an adaptation to counteract the spine deformity rather than an inherent feature of vestibular origin (Farahpour et al., ; Kuo et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Postural and muscle responses to galvanic vestibular stimulation reveal a vestibular deficit in adolescents with idiopathic scoliosis

Hatzilazaridis

Hatzitaki

Antoniadou

et al. 2019

Eur J of Neuroscience

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One of the most appealing hypotheses around the aetiopathogenesis of adolescent idiopathic scoliosis attributes the development of the spine deformity to an imbalance in the descending vestibulospinal drive to the muscles resulting in a differential mechanical pull on the spine during the early life stages. In this study, we explored this hypothesis by examining postural and muscle responses to binaural bipolar galvanic vestibular stimulation (GVS) of randomly alternating polarity. Adolescents diagnosed with idiopathic scoliosis (n = 12) and healthy age‐matched controls (n = 12) stood quietly with feet together (stance duration 66–102 s), eyes closed and facing forward, while 10 short (2s), transmastoidal, bipolar square wave GVS pulses (0.3–2.0 mA) of randomly alternating polarity were delivered at varying time intervals. Responses depicted in the electromyographic (EMG) activity of bilateral axial and appendicular muscles, vertical reaction forces and segment kinematics were recorded and analysed. Scoliotic patients demonstrated smaller ankle muscle responses and a delayed postural shift to the right relative to controls during anode right/cathode left GVS. When GVS polarity was reversed, patients had a greater soleus short‐latency response on the left anodal side, while the rest of the muscle and postural responses were similar between groups. Vestibular stimulation also evoked greater head and upper trunk sway in scoliotic compared with healthy adolescents irrespective of stimulus polarity. Results provide new preliminary evidence for a vestibular imbalance in adolescents with idiopathic scoliosis that is compensated by somatosensory, load‐related afferent feedback from the lower limbs during the latter part of the response.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Postural and muscle responses to galvanic vestibular stimulation reveal a vestibular deficit in adolescents with idiopathic scoliosis

Hatzilazaridis

Hatzitaki

Antoniadou

et al. 2019

Eur J of Neuroscience

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“…In most studies, increased EMG activity has been reported on the convex side of the scoliotic curve [11,12,19]; however, it is still not clear whether EMG changes reflect only local neurogenic or muscle disturbance or whether these findings are secondary to central nervous system involvement. Other authors [20] analyzed the electrical activity of the trunk muscles in adolescent idiopathic scoliosis patients during trunk lateral bending and rotation movements. They conclude that adolescent idiopathic scoliosis is associated with asymmetrical muscle activity.…”

Section: Discussionmentioning

confidence: 99%

Electrophysiological and histological changes of paraspinal muscles in adolescent idiopathic scoliosis

et al. 2016

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“…paraspinal muscle control during an educational rehabilitative treatment of "AIS", different studies tried to describe the SEMG signals of the trunk muscles in braced and unbraced conditions under different muscle contractions and underlying to different trunk excercises [7][8][9][10][11][12][13]. Kwok et al [14] proposed a very original and signi icative point of view to support the purpose of our study.…”

Section: Introductionmentioning

confidence: 69%

Perceptive and Rehabilitative Muscle Recruitment Facilitation Secondary to the use of a Dynamic and Asymmetric Spine Brace in the treatment of Adolescent Idiopathic Scoliosis (AIS)

Falso¹

2018

J Nov Physiother Rehabil

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Background: Supporting our adolescent people in realizing his/her self ability to reorganize and to establish a cross-linked paraspinal muscle control can be considered the most effective approach for muscle rehabilitation in adolescents affected by "AIS. Aim of this study was to evaluate the SEMG activity of paraspinal erector muscles by using an innovative dynamic and asymmetric spine brace called "BRIXIA" in the conservative treatment of patients affected by adolescent idiopathic scoliosis (AIS). Methods: Five patients affected by adolescent idiopathic scoliosis were recruited for the aim of this study in line with an informed consent and simple inclusion criteria. Each patient underwent a fi rst task-specifi c evaluation at time T0 and T1 and a secondary experimental course at time T2, T3 and T4. After a fi rst postural and total spine X-ray evaluation, recruited patients began to use our innovative spine brace called BRIXIA (time T0 and T1). During the second experimental phase, a SEMG bilateral activity of the trunk large rhomboid, the latissimus dorsi and the quadratus lumborum was investigated without spine brace, by using a common Chenêau brace and afterwards the dynamic BRIXIA spine brace, with the acquisition of the so-called RMS SEMG Ratio value. The SEMG measurements were acquired in six study conditions: a. SiRP=Sitting Resting Position; b. SiRCP=Sitting Recruiting Position with a so-called pneumothorax thrust; c. StRP = Standing Resting Position; d. StRCP = Standing Recruiting Position; e. BA = Anterior Trunk Bending; f. BARC = Anterior Trunk Recruiting Bending. At the end of this SEMG evaluation, each patient received (for a daily use around 18 hours per day) the fi nal version of the BRXIA spine brace and began an individualized educational postural rehabilitative treatment course (time T2). At time T3 and T4 a second and third SEMG assessment was made without using a spine brace and by using BRIXIA, with each patient evaluated in a resting condition and realizing a self-made crosslinked postural correction. Finally, a functional, radiographic and postural evaluation were made to defi ne and quantify an amelioration and modifi cation of patients' postural attitude at the end of a combined rehabilitative and device supported treatment. Findings: A comparative analysis of our SEMG data acquired in six study conditions showed different trends in all patients recruited proceeding from time T2 to time T5. Particularly, we observed at time T2 an homogeneous grade of paraxial muscle recruitment acquisition, expressed by the RMSsEMG ratio index, without using spine brace (53,3%) and by using Chêneau and BRIXIA brace (46,7%); specifi cally, a 57,14% of our patients used BRIXIA brace and a 42,86% Chêneau brace; the most homogeneous response was acquired in BA study condition; a symmetric paraxial

show abstract

Electromyographic activity of erector spinae and external oblique muscles during trunk lateral bending and axial rotation in patients with adolescent idiopathic scoliosis and healthy subjects

Cited by 32 publications

References 32 publications

Postural and muscle responses to galvanic vestibular stimulation reveal a vestibular deficit in adolescents with idiopathic scoliosis

Postural and muscle responses to galvanic vestibular stimulation reveal a vestibular deficit in adolescents with idiopathic scoliosis

Electrophysiological and histological changes of paraspinal muscles in adolescent idiopathic scoliosis

Perceptive and Rehabilitative Muscle Recruitment Facilitation Secondary to the use of a Dynamic and Asymmetric Spine Brace in the treatment of Adolescent Idiopathic Scoliosis (AIS)

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