Abstract
Efferent connections of medial (nucleus cuneiformis) and lateral regions of the midbrain reticular formation (MRF) were investigated using an anterograde autoradiographic technique in cats. Efferent fibers from the MRF ascend to the globus pallidus, substantia innominata, hypothalamus, subthalamus, and nonspecific associative and relay nuclei of the thalamus. Descending pathways to the conclusion that the cuneiform nucleus is more of a nonspecific structure than an association auditory center. The lateral reticular region had numerous projections to the lateral geniculate body and, together with the parabigeminal nucleus, forms the midbrain visual complex.
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Literature cited
T. S. Sotnichenko and L. A. Istomina, "Efferent connections of the cat thalamic midline shown by use of autoradiographic technique," Neirofiziologiya,16, No. 2, 224–230 (1984).
T. S. Sotnichenko and I. A. Istomina, "Ascending and descending projections of the reticular formation in cat midbrain," Arkh. Anat. Gistol. Embriol.,88, No. 8, 35–41 (1985).
D. Bowsher, "Reticular projections to lateral geniculate in cat," Brain Res.,23, No. 2, 247–249 (1970).
S. M. Edley and A. M. Graybiel, "The afferent and efferent connections of the feline nucleus tegmenti pedunulo-pontis pars compacta," J. Comp. Neurol.,217, No. 2, 187–218 (1983).
S. B. Edwards, "Autoradiographic studies of the projections of the midbrain reticular formation descending projections of nucleus cuneiformis," J. Comp. Neurol.,161, No. 3, 341–358 (1975).
S. B. Edwards and J. S. Olmos, "Autoradiographic studies of the projections of the midbrain reticular formation: ascending projections of nucleus cuneiformis," J. Comp. Neurol.,165, No. 4, 17–432 (1976).
Y. Lamour, P. Dutar, and A. Jobert, "Topographic organization of basal forebrain neurons projecting to the rat cerebral cortex," Neurosci. Lett.,34, No. 2, 117–122 (1982).
L. Leger, K. Sakai, D. Salvert, et al., "Delineation of dorsal lateral geniculate afferents from the cat brain stem as visualized by the horseradish peroxidase technique," Brain Res.,93, No. 3, 490–496 (1975).
N. Mizuno, M. Uemura-Sumi, Y. Yasui, et al., "Direct projections from the extrathalamic forebrains structures to the neocortex in the macaque monkey," Neurosci. Lett.,29, No. 1, 13–17 (1982).
D. K. Morest, "The lateral tegmental system of the midbrain and the medial geniculate body: study with Golgi and Nauta methods in cat," J. Anat.,99, No. 3, 611–634 (1965).
D. K. Morest and D. L. Oliver, "The neuronal architecture of the inferior colliculus in the cat: defining the functional anatomy of the auditory midbrain," J. Comp. Neurol.,222, No. 2, 209–236 (1984).
C. E. Ribak and W. G. Kramer, "Cholinergic neurons in the basal forebrain of the cat have direct projection to the sensorimotor cortex," Exp. Neurol.,75, No. 2, 453–465 (1982).
R. B. Veazey and C. M. Severin, "Efferent projections of the deep mesencephalic nucleus (pars lateralis) in the rat," J. Comp. Neurol.,190, No. 2, 231–244 (1980).
R. B. Veazey and C. M. Severin, "Efferent projections of the deep mesencephalic nucleus (pars medialis) in the rat," J. Comp. Neurol.,190, No. 2, 245–258 (1980).
M. Wiberg and A. B. Blomqvist, "The spinomesencephalic tract in the cat: its cells of origin and termination pattern as demonstrated by the intra-axonal transport method," Brain Res.,291, No. 1, 1–18 (1984).
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I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. Translated from Neirofiziologiya, Vol. 17, No. 5, pp. 646–652, September–October, 1985.
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Sotnichenko, T.S. Differentiation of efferent projections of the medial (cuneiform nucleus) and lateral regions of the reticular formation in cat midbrain. Neurophysiology 17, 466–471 (1985). https://doi.org/10.1007/BF01052183
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DOI: https://doi.org/10.1007/BF01052183