Publication

Increased basal-ganglia activation performing a non-dystonia-related task in focal dystonia

Journal Paper/Review - Aug 1, 2008

Units
PubMed
Doi

Citation
Obermann M, Diener H, Gizewski E, Vollmer-Haase J, Putzki N, Buhl A, Tumczak F, Lachenmayer M, Konczak J, de Greiff A, Yaldizli O, Maschke M. Increased basal-ganglia activation performing a non-dystonia-related task in focal dystonia. European journal of neurology : the official journal of the European Federation of Neurological Societies 2008; 15:831-8.
Type
Journal Paper/Review (English)
Journal
European journal of neurology : the official journal of the European Federation of Neurological Societies 2008; 15
Publication Date
Aug 1, 2008
Issn Electronic
1468-1331
Pages
831-8
Brief description/objective

BACKGROUND AND PURPOSE: We tried to determine whether altered sensorimotor cortex and basal-ganglia activation in blepharospasm (BSP) and cervical dystonia (CD) are restricted to areas directly responsible for the innervation of dystonic muscles, or whether impairment in focal dystonia reaches beyond these direct associations supporting a more global disturbance of sensory and motor control in focal dystonia. METHODS: Twenty patients with focal dystonia (11 BSP, 9 CD) and 14 healthy controls were investigated with functional magnetic resonance imaging (fMRI) performing a simple grip force forearm contraction task. RESULTS: BSP and CD patients and healthy controls showed similar activation in the pre-motor, primary motor and primary sensory cortex, whilst basal-ganglia activation was increased in BSP and CD with related activation patterns compared with controls. BSP patients had increased activation in the thalamus, caudate nucleus, putamen and lateral globus pallidus, whilst CD patients showed increased activation in the caudate nucleus, putamen and thalamus. No differences in applied grip force were detected between groups. CONCLUSIONS: In both, BSP and CD, increased basal-ganglia activation could be demonstrated in a task not primarily involving the dystonic musculature affected by these disorders. Comparable activation changes may also indicate a common pathway in the pathophysiology in BSP and CD.