Characteristics of Corticocortical Ipsilateral Connections of the Primary, Secondary, and Tertiary Sensorimotor Zones of the Cat Cerebral Cortex
- 36 Downloads
Experiments on 30 cats using the Nauta–Gigax method addressed the comparative distribution of associative fibers in the primary motor MI (field 4y) and the secondary SMII (2pri) and tertiary SMIII (field 5) sensorimotor zones of the cortex. A minor proportion of associative fibers was found to project to the primary sensory zone SI (fields 1, 2, 3a, 3b). Massive bilateral connections between the MI and the SMII (2pri) and SMIII (field 5) were demonstrated. It is suggested that recovery of motor functions after local lesions to SMI, SMII, and SMIII occur as a result of these multiple horizontal associative connections between the functional circuits of these sensorimotor centers.
Keywordsbrain sensorimotor cortex associative connections cat
Unable to display preview. Download preview PDF.
- 1.A. S. Batuev, Higher Integrative Centers of the Brain [in Russian], Nauka, Leningrad (1981).Google Scholar
- 2.S. N. Busheneva, A. S. Kadykov, and M. V. Krotenkova, “Current potential for studies of the functioning and reorganization of brain structures (review),” Neironauki i Klin. Nevropatol., No. 3, 37–41 (2007).Google Scholar
- 3.N. M. Ipekchyan, “Efferent connections of field 5 of the cat parietal cortex with the brainstem and spinal cord,” Biol. Zh. Armenii, No. 2, 193–198 (1980).Google Scholar
- 4.N. M. Ipekchyan, “Quantitative characteristics of the associative projections of field 4y to subfields of the sensorimotor and parietal cortex of the cat brain,” Morfologiya, 125, No. 1, 10–13 (2005).Google Scholar
- 5.N. M. Ipekchyan and O. G. Baklavadzhyan, “Projections of fields 5 and 7 in the subdivision of the sensorimotor area of the cat brain,” Neirofiziol., 20, No. 3, 319–326 (1988).Google Scholar
- 6.V. Mountcastle, “An organizing principle for cerebral function: the unit model and the distributed system,” in: The Mindful Brain, [Russian translation], Mir, Moscow (1981), pp. 15–67.Google Scholar
- 7.N. N. Traugott, S. I. Kaidanova, and Ya. A. Meerson, “Syndromes associated with lesions to the parietal lobes of the brain,” in: Evolution of the Parietal Lobes of the Brain [in Russian], Nauka, Leningrad (1973), pp. 118–125.Google Scholar
- 8.E. G. Shkolnik-Yarros, Neurons and Interneuronal Connections. The Visual Analyzer [in Russian], Meditsina, Leningrad (1965).Google Scholar
- 11.K. Brodmann, Vergleichende Lokalizationslehre der Großhirnrinde in ihren Prinzipien dargestellt auf Grund des Zellenbaues, J. A. Barth, Leipzig (1925).Google Scholar
- 13.R. Hassler and K. Muhs-Clement, “Architektonischer Aufbau des sensomotorischen und parietalen Cortex der Katze,” J. Hirnforsch., 6, No. 4, 377–420 (1964).Google Scholar
- 20.C. N. Woolsey, “Organization of somatic sensory and motor areas of the cerebral cortex,” in: Biological and Biochemical Bases of Behavior, University of Wisconsin Press, Madison (1958), pp. 63–81.Google Scholar