Medical dictionary. 2011.
prepyramidal — adj. 1) situated in the middle lobe of the cerebellum, in front of the pyramid. 2) describing nerve fibres in tracts that descend from the cerebral cortex to the spinal cord, before the crossing over that occurs at the pyramid of the medulla… … The new mediacal dictionary
prepyramidal fissure — fissura prebiventralis … Medical dictionary
tract — An elongated area, e.g., path, track, way. SEE ALSO: fascicle. SYN: tractus. [L. tractus, a drawing out] alimentary t. SYN: digestive t.. anterior corticospinal t. uncrossed fibers forming a small bundle in the anterior funiculus of the … Medical dictionary
Fissure — A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall. A fissure in the anus is distinctly abnormal. It is a painful… … Medical dictionary
fissura — 1. SYN: fissure. 2. In neuroanatomy, a particularly deep sulcus of the surface of the brain or spinal cord. [L. fr. findo, to cleave] f. antitragohelicina [TA] a fissure in the auricular cartilage between the … Medical dictionary
fissura prebiventralis cerebelli — [TA] prebiventral fissure: a fissure of the cerebellum separating the tuber vermis from the pyramid. Called also f. prepyramidalis cerebelli [TA alternative] and prepyramidal fissure … Medical dictionary
