Collegamenti transcallosali dei neuroni dell'area corticale somatica prima del Gatto

Giorgio Maria Innocenti; Tullio Manzoni

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti (1971)

  • Volume: 51, Issue: 3-4, page 254-259
  • ISSN: 0392-7881

Abstract

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In 16 chloralose-anaesthetized, curarized cats, extracellular recordings (glass micropipettes) were obtained from 197 SI neurones, and each one was tested with appropriate electrical stimulation both of their cutaneous receptive fields and of contralateral SI, SII, and anterior lateral associative (ALA) cortical areas. The study of peripheral reactivity showed that 97 neurones were endowed with very restricted, contralateral fields (somatotopic units, Group I), whereas 66 had wide fields, often bi- or ipsilateral (non-somatotopic units, Group II), and the remaining 34 showed no signs of peripheral reactivity (unreactive units, Group III). The stimulation of contralateral SI cortical area proved to be effective on 51 neurones of the sample; 44 of these (22.3%) exhibited excitatory responses (most after latencies consistent with the hypothesis of callosal transmission), 7 more were inhibited. Six neurones of the excited group were driven also by contralateral SII stimulation (although after long latencies); no neurones driven by SII alone or by ALA were found. By correlating the two sets of responses, the highest transcommissural reactivity was seen to characterize Group II neurones (54.5% excited, 3% inhibited); in this respect Group I ranked far behind (8.2% excited, 5.1% inhibited) and Group III was totally unreactive (no units excited, nor inhibited). The prevalence of Group II neurones in the transcallosally-excited sample might betray hitherto unsuspected mechanisms for the interhemispheric transfer of peripheral messages, including those from distal portions of limbs.

How to cite

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Innocenti, Giorgio Maria, and Manzoni, Tullio. "Collegamenti transcallosali dei neuroni dell'area corticale somatica prima del Gatto." Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti 51.3-4 (1971): 254-259. <http://eudml.org/doc/296069>.

@article{Innocenti1971,
author = {Innocenti, Giorgio Maria, Manzoni, Tullio},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
language = {ita},
month = {9},
number = {3-4},
pages = {254-259},
publisher = {Accademia Nazionale dei Lincei},
title = {Collegamenti transcallosali dei neuroni dell'area corticale somatica prima del Gatto},
url = {http://eudml.org/doc/296069},
volume = {51},
year = {1971},
}

TY - JOUR
AU - Innocenti, Giorgio Maria
AU - Manzoni, Tullio
TI - Collegamenti transcallosali dei neuroni dell'area corticale somatica prima del Gatto
JO - Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti
DA - 1971/9//
PB - Accademia Nazionale dei Lincei
VL - 51
IS - 3-4
SP - 254
EP - 259
LA - ita
UR - http://eudml.org/doc/296069
ER -

References

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  1. EBNER, F. F. e MYERS, R. E., «J. comp. Neurol.», 124, 353 (1965). 
  2. JONES, E. G. e POWELL, T. P. S., «J. Anat.», 103, 433 (1968). 
  3. PANDYA, D. N. e VIGNOLO, L. A., «Brain Res.», 15, 49 (1969). 
  4. WOOLSEY, C. N., Organization of somatic sensory and motor areas of the cerebral cortex. In H. F. Harlow e C. N. Woolsey (Eds.), «Biological and biochemical bases of behaviour», pp. 63-81, Madison, Wisconsin Press (1958). 
  5. INNOCENTI, G. M. e MANZONI, T., «Rend. Accad. Naz. Lincei, Cl. Sci. fis., mat. nat.», ser. VIII, 49, 431 (1970). 
  6. MOUNTCASTLE, V. B., «J. Neurophysiol.», 20, 408 (1957). 
  7. LEVITT, M. e LEVITT, J., «Exptl. Neurol.», 22, 276 (1968). 
  8. ZIMMERMAN, I. D. e KREISMAN, N. R., «Nature», 227, 1361 (1970). 
  9. MEYERSON, B. A., «Acta physiol, scand.», suppl. 312, 1 (1968). 
  10. NAITO, H., MIYAKAWA, F. e ITO, N., «Brain Res.», 27, 369 (1971). 
  11. NAITO, H., NAKAMURA, K., KUROSAKI, T. e TAMURA, Y., «Brain Res.», 19, 299 (1970). 
  12. JONES, E. G. e POWELL, T. P. S., «Brain Res.», 9, 71 (1968). 

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