Alcune caratteristiche funzionali delle proiezioni callosali all'area corticale SII del Gatto

Giorgio Maria Innocenti; Tullio Manzoni

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti (1970)

  • Volume: 49, Issue: 6, page 431-436
  • ISSN: 0392-7881

Abstract

top
The investigation whose preliminary results are reported herewith, was meant to ascertain the functional properties of SII neurones receiving callosal projections. Electrophysiological experiments were performed in 9 chloralose-anaesthetized, curarized cats. By means of glass micropipettes the electrical activity from 71 SII neurones was recorded. Each neurone has been tested with the stimulation of the peripheral receptive fields in order to classify the neuronal sample in lemniscal (Group I), extralemniscal (Group II) and unreactive (Group III) units. Sixty-seven units of the sample were further tested with electrical stimulation of contralateral SI, SII and ALA (anterior lateral associative) areas whereas the remaining 7 units were tested with the stimulation of the corpus callosum. From the data available it appears that, with the exception of one unit excited from contralateral ALA, only impulses set up in SI and SII were effective in eliciting excitation or inhibition of contralateral SII neurones. It appears moreover that, on some occasions, impulses from both areas converge on the same unit. The sign of the commissural effect, i.e. excitatory or inhibitory, is in general related to the kind of peripheral reactivity of the unit on which the effect is exerted. In fact, out of 5 inhibited units, 4 belonged to Group I, whereas among the 24 excited units, 23 pertained to Group II. No unit of Group III reacted to commissural impulses. The latency of the discharges to cortical and callosal stimulation allows one to regard most of the described effects as mediated through the corpus callosum.

How to cite

top

Innocenti, Giorgio Maria, and Manzoni, Tullio. "Alcune caratteristiche funzionali delle proiezioni callosali all'area corticale SII del Gatto." Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti 49.6 (1970): 431-436. <http://eudml.org/doc/296173>.

@article{Innocenti1970,
author = {Innocenti, Giorgio Maria, Manzoni, Tullio},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
language = {ita},
month = {12},
number = {6},
pages = {431-436},
publisher = {Accademia Nazionale dei Lincei},
title = {Alcune caratteristiche funzionali delle proiezioni callosali all'area corticale SII del Gatto},
url = {http://eudml.org/doc/296173},
volume = {49},
year = {1970},
}

TY - JOUR
AU - Innocenti, Giorgio Maria
AU - Manzoni, Tullio
TI - Alcune caratteristiche funzionali delle proiezioni callosali all'area corticale SII del Gatto
JO - Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti
DA - 1970/12//
PB - Accademia Nazionale dei Lincei
VL - 49
IS - 6
SP - 431
EP - 436
LA - ita
UR - http://eudml.org/doc/296173
ER -

References

top
  1. FADIGA, E. e MANZONI, T., «Arch. ital. Biol.», 107, 604 (1909). 
  2. MOUNTCASTLE, V. B., Some functional properties of the somatic afferent system. In W. A. Rosenblith (Ed.), «Sensory Communication», pp. 403-436, M.I.T. Press a. Wiley, New York (1961). MR134360
  3. MOUNTCASTLE, V. B. e DARIAN-SMITH, I., Neural mechanisms in somesthesia. In V. B. Mountcastle (Ed.), «Medical physiology», vol. II, pp. 1372-1423, The C. V. Mosby Co., St. Louis (1968). 
  4. CARRERAS, M. e ANDERSSON, S. A., «J. Neurophysiol.», 26, 100 (1963). 
  5. JONES, E. G. e POWELL, T. P. S., «J. Anat.», 103, 433 (1968). 
  6. BAVA, A., FADIGA, E., MANZONI, T. e MARICCHIOLO, M., «Arch. ital. Biol.», 108, 462 (1970). 
  7. ASANUMA, H. e OKUDA, O., «J. Neurophysiol.», 25, 198 (1962). 
  8. LI, C.-L. e CHOU, S. N., Inhibitory interneurons in the neocortex. In E. Roberts (Chief Ed.), «Inhibition in the neurons system and gamma aminobutyric acid», pp. 34-39, Pergamon Press, Oxford (1960). 
  9. MEYERSON, B. A., «Acta physiol, scand.», suppl. 312, 1-108 (1968). 
  10. NAITO, H., NAKAMURA, K., KUROSAKI, T. e TAMURA, I., «Brain Res.», 19, 299 (1970). 

NotesEmbed ?

top

You must be logged in to post comments.

To embed these notes on your page include the following JavaScript code on your page where you want the notes to appear.

Only the controls for the widget will be shown in your chosen language. Notes will be shown in their authored language.

Tells the widget how many notes to show per page. You can cycle through additional notes using the next and previous controls.

    
                

                
Note: Best practice suggests putting the JavaScript code just before the closing </body> tag.