Ciccarelli, O and Toosy, AT and Marsden, JF and Wheeler-Kingshott, CM and Sahyoun, C and Matthews, PM and Miller, DH and Thompson, AJ (2005) Identifying brain regions for integrative sensorimotor processing with ankle movements. EXP BRAIN RES , 166 (1) 31 - 42. 10.1007/s00221-005-2335-5.
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The objective of this study was to define cortical and subcortical structures activated during both active and passive movements of the ankle, which have a fundamental role in the physiology of locomotion, to improve our understanding of brain sensorimotor integration. Sixteen healthy subjects, all right-foot dominant, performed a dorsi-plantar flexion task of the foot using a custom-made wooden manipulandum, which enabled measurements of the movement amplitude. All subjects underwent a training session, which included surface electromyography, and were able to relax completely during passive movements. Patterns of activation during active and passive movements and differences between functional MRI (fMRI) responses for the two types of movement were assessed. Regions of common activation during the active and passive movements were identified by conjunction analysis. We found that passive movements activated cortical regions that were usually similar in location to those activated by active movements, although the extent of the activations was more limited with passive movements. Active movements of both feet generated greater activation than passive movements in some regions (such as the ipsilateral primary motor cortex) identified in previous studies as being important for motor planning. Common activations during active and passive movements were found not only in the contralateral primary motor and sensory cortices, but also in the premotor cortical regions (such as the bilateral rolandic operculum and contralateral supplementary motor area), and in the subcortical regions (such as the ipsilateral cerebellum and contralateral putamen), suggesting that these regions participate in sensorimotor integration for ankle movements. In future, similar fMRI studies using passive movements have potential to elucidate abnormalities of sensorimotor integration in central nervous system diseases that affect motor function.
|Title:||Identifying brain regions for integrative sensorimotor processing with ankle movements|
|Keywords:||functional MRI, motor system, active movement, passive movement, sensorimotor integration, PASSIVE MOVEMENTS, FINGER MOVEMENT, BASAL GANGLIA, ACTIVATION, FMRI, REPRESENTATION, DORSIFLEXION, CEREBELLUM, DISORDERS, INFERENCE|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > Brain Repair and Rehabilitation|
UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > IoN - Neuroinflammation
UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > Motor Neuroscience and Movement Disorders
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