Analisi microfisiologica sui collegamenti intrinseci cortico—corticali tra l'area SI e Varea SII

Roberto Caminiti; Tullio Manzoni; Giuseppe Spidalieri

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti (1975)

  • Volume: 58, Issue: 4, page 662-669
  • ISSN: 0392-7881

Abstract

top
Microelectrode recordings from the SII cortical area of chloralose-anaesthetized cats have been performed in order to ascertain the peripheral reactivity of the neurones receiving cortico-cortical projections from the ipsilateral SI area. With glass micropipettes, extracellular records were obtained from 64 cells isolated in the forepaw focus, and each one was tested with stimulation both of its peripheral receptive field (PRF) and of the forepaw region of the SI. Twenty-two such units were endowed with very strict, contralateral fields (Group IR), 7 with contralateral wide fields (Group IA), 14 with bilateral fields, either very wide (11 units; Group IIA) or strict (3 units; Group IIR). The remaining 21 neurones, not excitable from the periphery or excited only by peripheral electric shocks, were included in Group III. Upon single-shock stimulation of the ipsilateral SI, excitatory responses of short-latency (range, 1.8-7 msec; mean, 4.16 msec ± 0.15 s.d.) were recorded from 19 units, all excitable from PRF (Group IA: 6 cells; Group IIA: 10 cells; Group IIR: 3 cells). No unit of Group IR and III were seen to react to transcortical impulses. When PRF shocks were applied during subliminal stimulation of ipsilateral SI, a strong facilitatory effect was obtained. Comparison of the latency of the discharges elicited in SII neurones by SI stimulation with the latency of the effects obtained on the same units by stimulation of the ipsilateral thalamic VPL nucleus showed that most of the former effects did not imply any thalamic mediation.

How to cite

top

Caminiti, Roberto, Manzoni, Tullio, and Spidalieri, Giuseppe. "Analisi microfisiologica sui collegamenti intrinseci cortico—corticali tra l'area SI e Varea SII." Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti 58.4 (1975): 662-669. <http://eudml.org/doc/291243>.

@article{Caminiti1975,
author = {Caminiti, Roberto, Manzoni, Tullio, Spidalieri, Giuseppe},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
language = {ita},
month = {4},
number = {4},
pages = {662-669},
publisher = {Accademia Nazionale dei Lincei},
title = {Analisi microfisiologica sui collegamenti intrinseci cortico—corticali tra l'area SI e Varea SII},
url = {http://eudml.org/doc/291243},
volume = {58},
year = {1975},
}

TY - JOUR
AU - Caminiti, Roberto
AU - Manzoni, Tullio
AU - Spidalieri, Giuseppe
TI - Analisi microfisiologica sui collegamenti intrinseci cortico—corticali tra l'area SI e Varea SII
JO - Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti
DA - 1975/4//
PB - Accademia Nazionale dei Lincei
VL - 58
IS - 4
SP - 662
EP - 669
LA - ita
UR - http://eudml.org/doc/291243
ER -

References

top
  1. ANDERSEN, P., ANDERSSON, S. A. e LANDGREN, S. (1966) - Some properties of the thalamic relay cells in the spino-cervical-lemniscal path, «Acta physiol, scand.», 68, 72. 
  2. ANDERSEN, P., ECCLES, J. C., SCHMIDT, R. F. e YOKOTA, T. (1964) - Identification of relay cells and interneurones in the cuneate nucleus, «J. Neurophysiol.», 27, 1096. 
  3. BURCHFIELD, J. L. e DUFFY, F. H. (1974) - Corticofugal influence upon cat thalamic ventrobasal complex, «Brain Res.», 70, 395. 
  4. CARRERAS, M. e ANDERSSON, S. A. (1963) - Functional properties of neurones of the anterior ectosylvian gyrus of the cat., «J. Neurophysiol.», 26, 100. 
  5. DARIAN-SMITH, I., ISBISTER, J., MOK, H. e YOKOTA, T. (1966) - Somatic sensory cortical projection areas excited by tactile stimulation of the cat: a triple representation, «J. Physiol.», 182, 671. 
  6. FADIGA, E., INNOCENTI, G. M., MANZONI, T. e SPIDALIERI, G. (1972) - Peripheral and transcallosal reactivity of neurones sampled from the face subdivision of the SI cortical area, «Arch. ital. Biol.», 110, 444. 
  7. HOSKOM. J. e HELM, F. C. (1969) - Augmentation of the somatosensory thalamic response by "local" cerebral ischemia, «Life Sci.», 8, 301. 
  8. INNOCENTI, G. M. e MANZONI, T. (1972) - Response pattern of somatosensory cortical neurones to peripheral stimuli. An intracellular study, «Arch. ital. Biol.», 110, 322. 
  9. INNOCENTI, G. M., MANZONI, T. e SPIDALIERI, G. (1972) - Peripheral and transcallosal reactivity of neurones within SI and SII cortical areas. Segmental divisions, «Arch. ital. Biol.», 110, 415. 
  10. INNOCENTI, G. M., MANZONI, T. e SPIDALIERI, G. (1973) - Relevance of the callosal transfer in defining the peripheral reactivity of somesthetic cortical neurones, «Arch. ital. Biol.», 111, 187. 
  11. JONES, E. G. e POWELL, T. P. S. (1968) - The ipsilateral cortical connexions of the somatic sensory areas in the cat, «Brain Res.», 9, 71. 
  12. KAWAMURA, K. e OTANI, K. (1970) - Cortico-cortical fiber connection in the cat cerebrum: the frontal region, «J. Comp. Neurol », 139, 423. 
  13. MACCHI, G., ANGELERI, F. e GUAZZI, G. (1959) - Thalamo-cortical connections of the first and second somatic sensory areas in the cat, «J. Comp. Neurol.», 111, 387. 
  14. NAKAHAMA, I. (1959) - Cerebral response in somatic area II of ipsilateral somatic I origin, «J. Neurophysiol.», 22, 16. 
  15. SENCER, W. (1950) - Interconnection of somatic afferent areas I and II of cerebral cortex of the cat, «Amer. J. Physiol.», 163, 749. 
  16. SZENTÁGOTHAI, J. (1970) - Les circuits neuronaux de l'écorce cérébrale, «Bull. Acad. Méd. Belg.», VII Série, 10, 475. 
  17. WOOLSEY, C. N. e WANG, G. (1945) - Somatic sensory area I and II of the cerebral cortex of the rabbit, «Fed. Proc.», 4, 79. 

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.