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By E. Marani, J.H.R. Schoen

This quantity of Advances in Anatomy, Embryology and phone Biology relies on fabric assembled by means of Dr. Jaap H.R. Schoen who used to be one of many few neuroanatomists to use the Nauta approach to human fabric. Gaining perception within the outcomes of longitudinal harm to the human spinal wire is important ahead of reimplantation of the avulsed rootlets or an autologous transplant may be played in guy.

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Extra resources for A Reappraisal of the Ascending Systems in Man, with Emphasis on the Medial Lemniscus (Advances in Anatomy, Embryology and Cell Biology)

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Soon they fuse into a more or less triangular area, hardly to separate from the surroundings. From here on it proves impossible to follow its constituents separately by their fiber composition. 3 Degeneration Studies from Pathological Material In this section an attempt will be made to present conclusive evidence from cases in which small, mostly vascular lesions have damaged part of either the medial lemniscus or the internal arcuate fibers. 1 H3977 ml1 and mlp Components of the Medial Lemniscus This case with a 4-month survival time showed degenerated lemnicus fibers distinctly, since the lemniscal fibers degenerate retrogradely in a relatively short time.

Spinothalamic fibers make up only a small fraction of the ventrolateral funiculus. In Mehler’s estimate far less than one third of these fibers reach the thalamus, and in the fiber countings of Bowsher et al. (1960;12% of the 2– 4-µm and 36% of the 4–7-µm fibers present at the C1 level reach the intercollicular level) the tremendous numbers of thin ascending fibers in the ventrolateral funiculus probably were underestimated. There are few anatomical data that support a somatotopical arrangement in the spinothalamic pathway.

Fewer fibers can be traced into the parvocellular reticular formation. The nucleus ambiguus is negative for this degeneration. At the level of the pons the degeneration in the reticular formation is restricted to the ventrolateral funiculus. The motor nuclei of the facial, abducens, trochlear, and trigeminal nerves remain definitely free from degenerated fibers, as does the oculomotor nucleus. At the pontomesencephalic junction decreasing amounts of degenerated fibers are still concentrated around the dorsal tip of the lateral lemniscus, with preterminal degeneration in the sagulum, the dorsal parabrachial nucleus and, in H5631 (Fig.

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