Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11951
Title: Neural correlates of motor impairment during motor imagery and motor execution in sub-cortical stroke
Authors: Wong, WW
Chan, ST
Tang, KW
Meng, F
Tong, KY
Keywords: Brain activation
Functional MRI
Motor imagery
Stroke
Issue Date: 2013
Publisher: Taylor & Francis
Source: Brain injury, 2013, v. 27, no. 6, p. 651-663 How to cite?
Journal: Brain injury 
Abstract: Objective: This study aims at identifying the neural substrates for motor execution (ME) and motor imagery (MI) in patients after stroke and their correlations with functional outcomes. Methods: 10 chronic stroke patients with left sub-cortical lesions and 10 unimpaired subjects were recruited. Their cortical processes were studied when they were asked to perform ME and MI unimanually using their unaffected and affected wrists during fMRI. Results: From correlation results, the supplementary motor area (SMA), its activation volume and congruence in functional neuroanatomy associated with ME and MI using affected wrist positively correlated with motor performance. During ME of the affected wrist, the precuneus, its activation volume and congruence in functional neuroanatomy between patient and unimpaired groups showed a negative correlation, while, in non-primary motor areas, the hemispheric balance of premotor cortex and the congruence in functional neuroanatomy of contralesional inferior parietal lobule between patient and unimpaired groups showed a positive correlation with motor performance. Conclusions: The non-primary motor-related areas were revealed to play a critical role in determining motor outcomes after left sub-cortical stroke, which was demonstrated in the stroke patients. In particular, SMA might be the key neural substrate associated with motor recovery.
URI: http://hdl.handle.net/10397/11951
ISSN: 0269-9052
EISSN: 1362-301X
DOI: 10.3109/02699052.2013.771796
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