Cerebellar Lesions

1440 Words6 Pages
Cerebellar Lesions Introduction: The Cerebellum The Cerebellum, accounting for approximately 25 percent of the brain, sits above the brainstem and communicates with nearly all areas of the neuroaxis. It is implicated in sensory, motor, cognitive, emotional and speech processing, display neuroplasticity, learning, and memory. (Joseph, 2000.) The cerebellum is made up of several structures, and differing regions have different functions with a primary motor component, including visual processing, speech, and the visual guidance of movement (Joseph, 2000). Its main function continues to be “stabilizing the body and providing information about the position and movement of the head in relation to gravity” (Joseph), as well as coordination of axial and appendicular (trunk and limb) muscles, which takes place in the anterior lobes. The neocerebellum (the dentate gyrus and cerebellar hemispheres) evolved to coordinate upper/lower limb movements and gait. It is the neocerebellum that controls multiple joint and voluntary movements, and is indicative of fine motor skills and the resulting learned, then automatic, behavior. Appearing homogenous, the cerebellum is made up of a three layered cortex “which overlays and communicates with three pairs of deep cerebellar nuclei: the dentate, fastigious, and interpositus” (Joseph). It is further structurally and functionally divided up into the anterior lobes, posterior lobes, and flocculonodular lobes. The cerebellar body is divided into the archicerebellum (including the flocculonodular lobe), the paleocerebellum (aneterior lobe) and, lastly, the neocerebellum, so influential in motor, somatic, and cognitive activity. T... ... middle of paper ... ... They also experienced dysfunction in visuospatial short term memory. References Fabbro, F; Tavano, A; Corti, S; Bresolin, N; De-Fabritiis, P; Borgatti, R, (2004). The Long-term neuropsychological deficits after cerebellar infarctions in two young adult twins. Journal of Neuropsychologia.2004; Vol. 42 (4): 536-545. Information on Cerebellar disorders. Retrieved April 2005. Available at http://www.disabledworld.com/artman/publish/glossary.shtml. Information on the causes of cerebellar disorders. Retrieved April 2005. Available at http://www.merck.com/mmhe.html The Treasure at the Bottom of the Brain. Retrieved April 2005. Available at http:// www.newhorizons.org/neuro/leiner.htm Carlson’s Movement: The cerebellum. Information on cerebellar dysfunctions. Retrieved April 2005. Available at http://nawrot.psych.ndsu./cerebellumhtml.

More about Cerebellar Lesions

Open Document