Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex

Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex Publisher Pubmed

Salimi O¹ ; Zangbar HS² ; Shadiabad SH³ ; Ghorbani M¹ ; Ghadiri T² ; Kalan AE² ; Kheyrkhah H⁴ ; Shahabi P¹

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1. Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
2. Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
3. Division of Cognitive Neuroscience, Faculty of Education and Psychology, University of Tabriz, Tabriz, Iran
4. Department of Physiology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

Source: ASN Neuro Published:2021

Abstract

The loss of spinal sensorimotor pathways following spinal cord injury (SCI) can induce retrograde neurodegeneration in the primary motor cortex (M1). However, the effect of thoracic SCI on forelimb motor skills has not been studied clearly. So, herein we aimed to examine the effects of the thoracic SCI model on forelimb motor skills learning, parallel with dopaminergic and oscillatory changes in hindlimb and forelimb areas (HLA and FLA) of M1 in rats. Male Wistar rats were randomly subjected to laminectomy (Control) or contusion SCI at the thoracic (T10) level. Oscillatory activity and motor skills performance were evaluated for six consecutive days using local field potential (LFP) recording and skilled forelimb reaching task, respectively. Dopamine (DA) levels and expression of dopamine receptors (D1R and D2R) were determined in HLA and FLA by ELISA and western blotting. LFP recording results showed a sustained increase of LFP power in SCI rats compared with uninjured rats through skilled reaching training. Also, the SCI group had a lower reaching performance and learning rate in contrast to the Control group. Biochemical analysis of HLA and FLA showed a reduction in DA levels and expression of D1R and D2R after SCI. According to these findings, thoracic SCI causes aberrant changes in the oscillatory activity and dopaminergic system of M1, which are not restricted to HLA but also found in FLA accompanied by a deficit in forelimb motor skills performance. Summary statement: The reorganization of the primary motor cortex, following spinal cord injury, is not restricted to the hind limb area, and interestingly extends to the forelimb limb area, which appears as a dysfunctional change in oscillations and dopaminergic system, associated with a deficit in motor skills learning of forelimb. © The Author(s) 2021.

2. Combined Treatment of High-Intensity Interval Training With Neural Stem Cell Generation on Contusive Model of Spinal Cord Injury in Rats, Brain and Behavior (2023)

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Hojatallah Alaei (1)

Style	Citing Format
MLA	Salimi O, et al.. "Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex." ASN Neuro, vol. 13, no. , 2021, pp. -.
APA	Salimi O, Zangbar HS, Shadiabad SH, Ghorbani M, Ghadiri T, Kalan AE, Kheyrkhah H, Shahabi P (2021). Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex. ASN Neuro, 13(), -.
Chicago	Salimi O, Zangbar HS, Shadiabad SH, Ghorbani M, Ghadiri T, Kalan AE, Kheyrkhah H, Shahabi P. "Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex." ASN Neuro 13, no. (2021): -.
Harvard	Salimi O et al. (2021) 'Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex', ASN Neuro, 13(), pp. -.
Vancouver	Salimi O, Zangbar HS, Shadiabad SH, Ghorbani M, Ghadiri T, Kalan AE, et al.. Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex. ASN Neuro. 2021;13():-.
BibTex	@article{ author = {Salimi O and Zangbar HS and Shadiabad SH and Ghorbani M and Ghadiri T and Kalan AE and Kheyrkhah H and Shahabi P}, title = {Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex}, journal = {ASN Neuro}, volume = {13}, number = {}, pages = {-}, year = {2021} }
RIS	TY - JOUR AU - Salimi O AU - Zangbar HS AU - Shadiabad SH AU - Ghorbani M AU - Ghadiri T AU - Kalan AE AU - Kheyrkhah H AU - Shahabi P TI - Forelimb Motor Skills Deficits Following Thoracic Spinal Cord Injury: Underlying Dopaminergic and Neural Oscillatory Changes in Rat Primary Motor Cortex JO - ASN Neuro VL - 13 IS - SP - EP - PY - 2021 ER -

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