Visual hemi-inattention after ventrolateral thalamotomy

Motor neglect associated with loss of action inhibition

“…Thalamotomy, a procedure used to treat dyskinesia, has previously been shown to result in motor neglect 13. Two of our patients had lesions that incorporated much of the thalamus and one patient had a lesion that encroached onto the ventral part of the thalamus.…”

Cognitive function in patients with Parkinson's disease undergoing stereotaxic thalamotomy.

“…Vilkki found that patients with surgery on the left side were more affected than patients with surgery on the right side when tested for visual search, showing a type of hemispatial neglect. 25 Almgren et al found that patients with left sided thalamotomy were more impaired than patients with a right sided thalamotomy on both a verbal memory test and the Stroop task.26 However, none of these authors found that cognitive function was in general impaired after the operation. The sample sizes were small in both studies, hence making it difficult to draw definitive conclusions.…”

Diaschisis.

“…Lesions of the left or right medio-dorsal nucleus may produce verbal and visual amnesia respectively, while bilateral lesions may result in global amnesia or dementia. 40 ' 41 Some of these thalamic injury syndromes have also been reproduced in nonhuman primates. 42 In view of the dense thalamocortical projections, it has been speculated that these behavioral consequences of thalamic damage result from cortical dysfunction after loss of these important cortical afferents -perhaps a loss of cortical "activation."…”