Clinical and Surgical Applications of the Ventral Intermediate Subnucleus

The thalamus is a complex anatomical structure where most of the nerve pathways pass by. It is considered a diencephalic subcortical basal ganglia. It consists of a large number of nuclei and subnuclei, which perform varied functions. From the functional point of view it can be classified as: 1 - Motor Thalamus, 2 -Sensory Thalamus and 3- Limbic Thalamus.The motor thalamus is defined as the cytoarchitechtonic portion of the thalamus which links motor subcortical grey structures (basal ganglia and cerebellum) to cortical regions such as primary motor cortex, supplementary motor area and premotor cortex.The concept of motor thalamus is not related to the corticospinal tract but with classic extrapyramidal system.For this work, cadaveric material, histological preparations, stereotactic neurosurgery atlas and bibliography were used, as well as two videotapes about neurosurgical patients with tremor, with two different methodologies were filmed.Our goal is to determine the anatomical features of motor thalamus, specifically the ventral intermediate subnucleus constitent of ventral lateral nucleus, and their therapeutic relevance in neurosurgical treatment of tremor.