Third Ventricular Width and the Thalamocapsular Border

Abstract

65 patients were selected to assess variations in third ventricular width. The patients suffered from various extrapyramidal movement disorders, and all had undergone stereotactic VL thalamotomies. Third ventricular width was correlated with age, sex, diagnosis and intercommissural distance. Based upon the analysis of somatosensory response mappings, a medial displacement of the thalamocapsular border was demonstrated for patients with narrow third ventricles.

Deep Brain Stimulation of the Dentato-Rubro-Thalamic Tract: Outcomes of Direct Targeting for Tremor

“…Larger third ventricular widths would typically displace the DRTt tract laterally and hence our coordinate as well, in accordance with historic post‐mortem studies and thalamotomy reports of physiologically defined regions relative to anatomy . Sometimes, with a very wide third ventricle, it is possible that ex vacuo enlargement occurred associated with thalamic atrophy, which would cause less displacement of normal anatomy, as contended by others .…”

Neurophysiological Atlas of the Human Thalamus and Adjacent Structures

“…However, recent neuro physiological studies revealed that the lateral thalamic borders of the patient group with large third ventricles were laterally localized when compared with those with small third ventricles [5,7] with little overlap between the two groups [5]. The current study did not show such a defi nite tendency.…”

Investigation of the Surgical Target for Alleviation of Involuntary Movement Disorders

“…Figure 4 plots the usual, tetanizing motor effects, virtually all of which reflect activation of corticospinal fibers in inter nal capsule. Apparent thalamic responses arose in patients whose thalami were narrower than that of the brain used for the Schaltenbrand and Bailey atlas [4], The upper panels of figure 3 display a special type of motor effect incapable of following rapid rates of stimulation, centred in or close to the common lesion site in V.i.m. or in the poste rior ventral oral nucleus; it presumably reflects transsynaptic activa tion of area 4 [8].…”