猫の皮質連合領および周囲の皮質から起こる投射線維群

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Fifteen cat brains containing surgical lesions in the association cortex and the surrounding cortices were studied by the use of the Nauta staining technique for degenerating fibers. Lesions were strictly localized at the cortex and the subjacent white matters were free from invasion. From the cortical lesions in the association cortex (anterior two third of the middle suprasylvian gyrus and anterior one third of the anterior lateral gyrus) numerous degenerating fibers could be followed into the diverse subcortical structures. However, these projection fibers were divided into following four main pathways. (1) Projection fibers entering the caudate nucleus by way of the ipsilateral internal capsule. (2) Projection fibers through thalamic reticular nucleus [a] to the dorsal lateral nucleus, [b] to the lateral central nucleus and the adjacent part of the posterior lateral nucleus and [c], in somewhat posterior, to the lateral part of the posterior lateral nucleus and to the pulvinar. (3) The fibers, which has been located in the ventral part of the thalamic reticular nucleus at the level of the lateral geniculate body dividing the thalamic reticular nucleus into the dorsal and ventral parts, course to the following four directions : Projection fibers [a] to the ventral nucleus of the lateral geniculate body, [b] through the ventral part of the posterior lateral nucleus to the centrum medianum nucleus, [c] following the "b" group fibers mentioned above, through the ventral part of the posterior lateral nucleus and the suprageniculate nucleus mainly to the nucl. pretectalis profundus (Bucher & Nauta) and, to a lesser extent, to str. griseum intermedium of the superior collieulus and to the mesencephalic reticular formation,[d] from the internal capsule and the cerebral peduncle through the ventral part of the thalamic reticular nucleus to the zona incerta and Forel's H neld and further caudally to the dorsolateral part of the red nucleus (distributed mainly around the medium sized cells) and the adjacent mesencephalic reticular formation as well. (4) Fibers remaining in the cerebral peduncle, to the ipsilateral pontine nuclei. Among these projection fibers, the tracts to the striatum, pontine nuclei, centrum medianum nucleus and str. griseum intermedium of the superior colliculus originate not only in the association cortex but in the gyri anterior and ventral to it. The cortical area projecting to the ventral nucleus of the lateral geniculate body and to pulvinar corresponds mainly to the visual cortex but partially to the association cortex from behind. The area in which the tract takes its origin to the posterior lateral nucleus corresponds mostly to the association cortex but, strictly speaking, this area shows somewhat wider extent. The tracts to the dorsal lateral nucleus, lateral central nucleus, nucl. pretectalis profundus (Bucher & Mauta), ventral part of the thalamic reticular nucleus, zona incerta, Forel's H fieldr red nucleus and mesencephalic reticular formation take origins mainly within the association cortex.
千葉大学の論文
1965-05-28

猫の皮質連合領および周囲の皮質から起こる投射線維群

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