Abstract
The Nauta-Gygax method was used to study the ipsilateral associative connections of motor cortex field 4y after local electrolytic lesioning of this zone. The relative quantitative distribution of associative fibers running from field 4y to somatosensory areas I and II, the motor cortex, and the parietal cortex was determined. The greatest projections of field 4y were found to be directed to field 2pri (the secondary somatosensory zone) and field 5ab. Occasional degenerative fibers passed to fields 1, 2, 3a, and 3b of the primary somatosensory zone of the cortex. Efferent fibers from field 4y were not directed to fields 4fu, 4sfu, 6aa, 6ab, or 6ifu. It is suggested that the morphological basis of motor reactions mediated by field 4y is not provided by the fundal (4fu, 4sfu, 6ifu) or premotor (6aa, 6ab) fields but by field 2pri and 5ab, with which it has more extensive connections.
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REFERENCES
N. M. Ipekchyan and O. G. Baklavadzhyan, “Projections of fields 5 and 7 to the subdivisions of the sensorimotor area of the cortex of the cat brain,” Neirofiziologiya, 20, No. 3, 319–326 (1988).
C. Avendano, E. Rausell, D. Peres-Aquilar, and S. Isorna, “Organization of the association cortical afferents connections of area 5: A retrograde tracer study in the cat,” J. Comp. Neurol., 278, neuron 1, 1–33 (1988).
R. Hassler and K. Muhs-Clement, “Architektonischer Aufbau des sensomotorischen und parietalen Cortex der Katze,” J. Hirnforsch., 6, No. 4, 377–420 (1964).
D. R. Humphrey, R. Gold, and D. J. Reed, “Sizes, laminar and topographic origin of cortical projections to the major division of the red nucleus in the monkey,” J. Comp. Neurol., 25, No. 1, 75–94 (1984).
E. G. Jones and T. P. S. Powell, “The ipsilateral cortical connections of the somatic sensory area in the cat,” Brain Res., 9, No. 1, 71–94 (1968).
K. Kawamura and K. Otani, “Corticocortical fiber connections in the cat cerebrum: The frontal region,” J. Comp. Neurol., 139, No. 4, 423–448 (1970).
A. Mori, R. S. Waters, and H. Asanuma, “Physiological properties and patterns of projection in the cortico-cortical connections from the second somatosensory cortex to the motor cortex, area 4y in the cat,” Brain Res., 504, No. 2, 206–210 (1989).
W. I. H. Nauta and P. A. Gygax, “Silver impregnation of degenerating axons in the central nervous system: a modified technique,” Stain Technol., 29, No. 1, 91–93 (1954).
C. R. Olson and I. Jeffers, “Organization of cortical and subcortical projections to area 6m of the cat,” J. Comp. Neurol., 226, No. 1, 73–94 (1987).
G. Rizzolatti, G. Luppino, and M. Matelli, “The organization of the cortical motor system: new concepts,” EEG Clin. Neurophysiol., 106, 283–296 (1998).
H. Yumiya and C. Ghez, “Specialized subregion in the cat motor cortex: anatomical demonstration of differential projections to rostral and caudal sectors,” Exptl. Brain Res., 53, No. 2, 259–276 (1984).
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.
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Translated from Morfologiya, Vol. 127, No. 1, pp. 10–13, January–February, 2005.
Director Dr L. B. Nersesyan
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Ipekchyan, N.M. Quantitative Characteristics of the Associative Projections of Field 4y to Subfields of the Sensorimotor and Parietal Cortex of the Cat. Neurosci Behav Physiol 36, 265–269 (2006). https://doi.org/10.1007/s11055-006-0009-9
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DOI: https://doi.org/10.1007/s11055-006-0009-9