Fiber Pathways of the Brain by Jeremy D. Schmahmann

By Jeremy D. Schmahmann

This certain quantity is a entire, well-illustrated research of the association of the white subject pathways of the mind. Schmahmann and Pandya have analyzed and synthesized the corticocortical and corticosubcortical connections of the foremost parts of the cerebral cortex of the rhesus monkey. the result's a close figuring out of the components of the cerebral white subject and the association of the fiber tracts. The findings from the 36 instances studied are offered on a unmarried template mind, facilitating comparability of the destinations of the several fiber pathways. The precis diagrams offer a complete atlas of the cerebral white topic. The textual content is enriched via shut cognizance to useful features of the anatomical observations. The scientific relevance of the pathways is addressed through the textual content and a bankruptcy is dedicated to human white topic ailments. The introductory account offers a close ancient historical past. Translations of seminal unique observations through early investigators are offered, and whilst those are thought of within the mild of the authors' new observations, many longstanding conflicts and debates are resolved. This scholarly booklet is a vital addition to platforms and cognitive neuroscience that may be of lasting worth to neurobiologists, anatomists, neurologists, neurosurgeons, neuroradiologists, psychiatrists, psychologists, and to their scholars and trainees.

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Santiago Ramón y Cajal (1852–1934) provided independent histological confirmation in 1888 of the contiguity of nerve cell elements. Cajal’s study of basket cells and Purkinje neurons in the cerebellar cortex, and then of neurons in the cerebral cortex, laid to rest the neural net theory of Golgi and established the neuron doctrine. ) In his Croonian lecture, Cajal (1894) summarized the understanding of the nerve cell and the fibers that make up the white matter systems. ” (Proc. R. Soc. 1894;55:444–468.

This led to the conclusion that animal spirits issued from the cortex, streamed through the fibers of the white matter, and crossed the corpora striata, made up of medullary (white matter) fibers, to form places where they could collect together. Great importance was placed on the corpus callosum by Giovanni Maria Lancisi (1654–1720). In 1718 he stated that “it is quite clear that the part formed by the weaving together of innumerable nerves is both unique and situated in the middle [of the brain]; and so it can be said it is like a common marketplace of the senses, in which the 12 White Matter Pathways in Early Neuroscience external impressions of the nerves meet.

Fig. 10 labels *, radiation of the corpus callosum into the hemisphere. Fig 11 labels: +, radiation of the optic nerve into the hemisphere. 23 Relevance of the Cerebral White Matter Fiber Pathways fluence at the time, strongly opposed Gall’s cortical localization theory and phrenology and believed in the functional omnivalence (equivalence) of the cerebrum and cerebellum. He did, however, propose that vision is localized in the cerebral cortex and argued against the notion that the cerebral cortex in some way presides over sensory functions without being able to see, hear, or feel.

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