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28 results on '"M. Bénita"'

1. Discussion on Extrapyramidal Hyperkinesias

Author

W. Wahren, D.M.C. Forster, F. Erbel, E. Gabriel, N.M. Chebotaryova, A. Takeda, F. Marossero, W. Umbach, P. Vogel, P. Richardson, J. Gybels, R. Nakamura, M. Bénita, J. Siegfried, B. Rewcastle, O. Tzavellas, R. Chow, V.A. Iliukhina, B. Stewart, T. Nagao, G. Kullberg, F. Mundinger, Y. Takaoka, A.N. Bondartchuk, E. Toivakka, V.M. Smirnov, Yu.K. Matveev, T. Doi, B. Friedel, V.B. Gretchin, R. Ahmed, C.H. Lücking, Y.K. Kim, K. Vaernet, R.R. Tasker, G. Schaltenbrand, S. Tóth, R. Hassler, A.N. Shandurina, G.R. Haase, J. Cophignon, D. Zivanovic, M. Dondey, K. Sugita, R.M. Lehman, P.-E. Almgren, F.J. Gillingham, L. Laitinen, F. Peluso, L. Infuso, G. Ettorre, B.S. Nashold, R. Emmers, K. Nittner, M. Haider, H. Spuler, K.A. West, H. Krayenbühl, N.P. Bechtereva, A. Struppler, J.A. Ganglberger, A.L. Andersson, V.K. Pozdeev, T. Hirota, E.P. Petushkov, I.A. Pullar, E.G. Szekely, T. Riechert, H. Narabayashi, N. Mutsuga, H.T. Wycis, K. Hartmann-von Monakow, W.P. Wilson, B.A. Meyerson, C.D. Ray, E. Groll-Knapp, K. Hahn, J. Tetteh, B. Rümler, P.L. Gildenberg, J.H. Dowson, G. Dieckmann, W. Pontzen, Ed. Kandel, G.R. Narayanaswamy, G.P. Cabrini, L. Leksell, H. Klasen, P.C. Potthoff, H. Condé, H.E. Diemath, B.-E. Roos, D.K. Kambarova, and A. Caracalos

Subjects
Surgery, Neurology (clinical)
Published
1972
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3. Discussion on Anatomical and Physiological Correlations

Author

Y.K. Kim, D.M.C. Forster, O. Tzavellas, M. Dondey, R. Ahmed, V.A. Iliukhina, P. Richardson, J.A. Ganglberger, A.N. Shandurina, G.R. Haase, R. Chow, E.G. Szekely, T. Riechert, S. Tóth, K. Vaernet, R.R. Tasker, A. Struppler, H. Narabayashi, K. Nittner, A. Caracalos, B. Stewart, R.M. Lehman, T. Nagao, F. Mundinger, L. Infuso, W. Umbach, B. Friedel, A.N. Bondartchuk, R. Emmers, H. Spuler, C.H. Lücking, C.D. Ray, B.S. Nashold, V.M. Smirnov, Yu.K. Matveev, T. Doi, P. Vogel, I.A. Pullar, H. Klasen, F. Erbel, W.P. Wilson, P.C. Potthoff, N. Mutsuga, R. Hassler, W. Wahren, M. Haider, H.E. Diemath, F.J. Gillingham, L. Laitinen, G. Ettorre, T. Hirota, E. Toivakka, B.-E. Roos, J. Cophignon, E.P. Petushkov, B. Rewcastle, H. Condé, D.K. Kambarova, J. Siegfried, E. Gabriel, G.R. Narayanaswamy, N.M. Chebotaryova, F. Peluso, K. Sugita, Y. Takaoka, G. Kullberg, K.A. West, A. Takeda, F. Marossero, H. Krayenbühl, N.P. Bechtereva, G. Schaltenbrand, D. Zivanovic, P.-E. Almgren, J. Tetteh, B. Rümler, E. Groll-Knapp, Ed. Kandel, K. Hahn, G.P. Cabrini, G. Dieckmann, W. Pontzen, L. Leksell, P.L. Gildenberg, J.H. Dowson, J. Gybels, R. Nakamura, M. Bénita, V.B. Gretchin, B.A. Meyerson, H.T. Wycis, K. Hartmann-von Monakow, A.L. Andersson, and V.K. Pozdeev

Subjects
Surgery, Neurology (clinical)
Published
1972
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4. Discussion on Speech Disorders in Parkinsonism, Psychosurgery

Author

N. Mutsuga, V.A. Iliukhina, F. Peluso, E. Toivakka, H. Spuler, G.R. Narayanaswamy, G. Ettorre, R. Ahmed, W. Umbach, R. Hassler, C.D. Ray, S. Tóth, J. Siegfried, Y.K. Kim, K. Sugita, B. Rewcastle, A.N. Shandurina, G.R. Haase, H. Klasen, B. Stewart, B.A. Meyerson, M. Dondey, P.C. Potthoff, A.N. Bondartchuk, W.P. Wilson, P. Vogel, Y. Takaoka, F.J. Gillingham, V.M. Smirnov, R.M. Lehman, B.S. Nashold, Yu.K. Matveev, T. Doi, L. Laitinen, H. Condé, A. Caracalos, R. Chow, H.T. Wycis, G. Kullberg, M. Haider, E. Gabriel, K. Nittner, P. Richardson, N.M. Chebotaryova, J. Tetteh, O. Tzavellas, W. Wahren, B. Rümler, T. Nagao, F. Mundinger, H.E. Diemath, A. Takeda, G. Dieckmann, C.H. Lücking, K. Hartmann-von Monakow, D.M.C. Forster, B.-E. Roos, K.A. West, L. Infuso, H. Krayenbühl, D.K. Kambarova, W. Pontzen, R. Emmers, E. Groll-Knapp, J. Cophignon, N.P. Bechtereva, G. Schaltenbrand, K. Vaernet, R.R. Tasker, F. Marossero, V.B. Gretchin, F. Erbel, J. Gybels, R. Nakamura, M. Bénita, D. Zivanovic, P.-E. Almgren, B. Friedel, A. Struppler, J.A. Ganglberger, T. Hirota, A.L. Andersson, E.P. Petushkov, V.K. Pozdeev, Ed. Kandel, G.P. Cabrini, L. Leksell, P.L. Gildenberg, J.H. Dowson, K. Hahn, E.G. Szekely, T. Riechert, H. Narabayashi, and I.A. Pullar

Subjects
medicine.medical_specialty, Parkinsonism, medicine, Surgery, Neurology (clinical), Psychology, medicine.disease, Psychiatry, Psychosurgery
Published
1972
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5. Scheduled-training of cats to a simple reaction time performance

Author

H, Condé, J F, Dormont, A, Schmied, and M, Bénita

Subjects
Reinforcement Schedule, Time Factors, Computers, Movement, Conditioning, Psychological, Cats, Methods, Animals, Conditioning, Operant
Abstract

Cats were trained to release a lever at the onset of a sound, using a simple reaction time paradigm with different foreperiods. The training of the subjects was controlled by a PDP 8/L computer with a training schedule that avoided the problems of manual shaping except for the preliminary step, the lever press. This schedule successfully trained the cats in about 6 daily sessions up to the reaction time paradigm with a 3 sec criterion. In contrast, a programme designed to reduce the criterion value so as to induce the subjects to perform shorter latency movements failed because the cats learned to control it through an escape procedure.

Published
1978

6. Control of reaction time performance involves the striatum

Author

H, Condé, M, Bénita, J F, Dormont, A, Schmied, and A, Cadoret

Subjects
Cold Temperature, Thalamic Nuclei, Cats, Reaction Time, Animals, Humans, Parkinson Disease, Caudate Nucleus, Corpus Striatum
Abstract

Cats were tested for the effect of unilateral cooling of the centre median nucleus of the thalamus (CM) or of the caudate nucleus (Cd) as they performed a simple reaction time schedule. Shortening of reaction time occurred during CM cooling. Lengthening of the reaction time was observed during Cd cooling. Moreover, the Cd cooling was followed after a variable delay of a few minutes by a slowing down of the trial rate, and even by the arrest of performance for the lowest cooling temperature. The subject restarted at will after an arrest period, without motivational or motor disturbances, except for a short period of rotatory behaviour. The arrest period duration was about equal to the arrest period latency. Human subjects suffering from Parkinson's disease were tested with the same reaction time schedule. They showed lengthened reaction times and difficulty to perform reliably more than a ten of trials.

Published
1981

8. Effects of local cooling upon conduction and synaptic transmission

Author

H. Condé and M. Bénita

Subjects
Materials science, Red nucleus, Efferent, Neural Conduction, Neurotransmission, Synaptic Transmission, Thalamus, medicine, Animals, Molecular Biology, Closed circuit, Red Nucleus, Freon, General Neuroscience, Subthalamus, Anatomy, Thermal conduction, Cold Temperature, medicine.anatomical_structure, Cerebellar Nuclei, Synapses, Biophysics, Cats, Neurology (clinical), Excitation, Developmental Biology, Brain Stem
Abstract

Summary A closed circuit cryogenic apparatus, and its probes, are described. The regulated expansion of the liquid (freon 12) and the apparatus allow cooling to be obtained within 10 sec within a range of −20°C and +20°C, with a precision of 1°C, in the deep structures of the mammalian brain. The cooling surface is limited to the tip of the probe, there being an insulating vacuum jacket extending to about 1mm from this tip. A study of the rubro-thalamic relay of dentate impulses shows that, at 10°C or above, cooling localised to the rostral levels of the red nucleus reversibly blocks transsynaptic excitation. Elsewhere in the red nucleus or cephalad, i.e. , in the subthalamus, even with cooling to lower temperatures (above 0°C) it is impossible to block conduction along dentato-thalamic fibres. This supports the theory that the origin of a rostral, ipsilateral efferent tract is located in the most rostral cells of the red nucleus, i.e. , the anterior red nucleus (NRA). These results demonstrate the possibility of blocking transsynaptic excitation by moderate cooling without impairing conduction along the fibres intermingled with the cells. At lower temperatures (0°C to – 10°C) a reversible blockage of conduction in the coursing fibres in the NRA occurs. Below −10°C the blockage becomes irreversible due to cryocoagulation. The validity of the data and use of this technique for producing strictly localised cooling in acute or chronic experiments are discussed.

Published
1972

11. Etude des eff�rences du noyau centre m�dian du thalamus du chat vers le cortex et les structures strio-pallidales

Author

M. Bénita and H. Condé

Subjects
Internal capsule, General Neuroscience, Putamen, Thalamus, Caudate nucleus, Striatum, Anatomy, Biology, medicine.anatomical_structure, Globus pallidus, nervous system, Gyrus, Cortex (anatomy), medicine, Neuroscience
Abstract

1. Evoked potentials were recorded in cats to study the distribution of axons leaving the Centrum Medianum of thalamus (CM). 2. Non-repetitive CM stimulation elicits surface-positive potentials onto the associative cortex: anterior sigmoid gyrus, anterior marginal gyrus and suprasylvian gyrus (minimal latencies, 2, 4, 6 ms). The stimulation of these cortical foci by electrodes in the grey matter does not evoke in the CM any asynaptic response. It is concluded that the cortical response is not a sufficient indication of a cortical projection of the CM. 3. Associative cortical responses evoked by somatic stimulation are not affected either by electrocoagulation of CM or by cooling the CM with a cryogenic probe insulated except at the tip. Hence the CM does not seem to contribute to relay somatic activation from the periphery to the ipsilateral cortex. 4. Asynaptic responses (0.2–0.8 ms latency) and corresponding postsynaptic responses (0.5–1.5 ms latency) are recorded in the internal capsule, dorsal parts of putamen and globus pallidus, and in the entopedoncular nucleus. 5. Long latency waves are also recorded in these regions, in the amygdaloid complex (2–9 ms latency) and in the caudate nucleus (minimal latency, 12 ms). Their distribution and their latencies are not related to those of the asynaptic responses. 6. The hypothesis that the CM plays a role in pain is discussed on the basis of hodological data.

Published
1971
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14. Discussion on Stereotaxic Techniques

Author

R. Chow, B.S. Nashold, V.A. Iliukhina, A. Struppler, A.N. Shandurina, G.R. Haase, K. Sugita, G. Schaltenbrand, C.D. Ray, F. Marossero, B. Friedel, E. Gabriel, F.J. Gillingham, N.M. Chebotaryova, L. Laitinen, W. Wahren, E. Groll-Knapp, J. Cophignon, P. Vogel, O. Tzavellas, H.T. Wycis, Y.K. Kim, H.E. Diemath, J. Siegfried, D.M.C. Forster, R. Ahmed, M. Dondey, B.-E. Roos, W. Umbach, G.R. Narayanaswamy, K. Hahn, Ed. Kandel, E.G. Szekely, D.K. Kambarova, T. Riechert, R. Hassler, K. Hartmann-von Monakow, B. Stewart, G. Kullberg, P. Richardson, H. Narabayashi, A. Caracalos, G. Dieckmann, G.P. Cabrini, A.N. Bondartchuk, F. Erbel, W.P. Wilson, H. Klasen, W. Pontzen, N. Mutsuga, P.C. Potthoff, B.A. Meyerson, J. Tetteh, I.A. Pullar, B. Rümler, H. Condé, L. Leksell, S. Tóth, R.M. Lehman, V.M. Smirnov, Yu.K. Matveev, T. Doi, M. Haider, P.L. Gildenberg, J.H. Dowson, A. Takeda, F. Peluso, B. Rewcastle, A.L. Andersson, V.K. Pozdeev, Y. Takaoka, E. Toivakka, H. Spuler, J.A. Ganglberger, K. Vaernet, R.R. Tasker, T. Nagao, F. Mundinger, C.H. Lücking, G. Ettorre, L. Infuso, R. Emmers, J. Gybels, R. Nakamura, M. Bénita, V.B. Gretchin, D. Zivanovic, P.-E. Almgren, T. Hirota, E.P. Petushkov, K. Nittner, K.A. West, H. Krayenbühl, and N.P. Bechtereva

Subjects
Computer science, Stereotaxic technique, Surgery, Neurology (clinical), Biomedical engineering
Published
1972
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15. Discussion on Hyperkinesias

Author

J.A. Ganglberger, K. Vaernet, R. Ahmed, R.R. Tasker, S. Tóth, G.R. Narayanaswamy, A.L. Andersson, V.K. Pozdeev, K.A. West, H. Krayenbühl, E.G. Szekely, N.P. Bechtereva, A.N. Shandurina, G.R. Haase, T. Riechert, Ed. Kandel, C.D. Ray, W. Umbach, R. Hassler, G.P. Cabrini, D.M.C. Forster, R.M. Lehman, V.M. Smirnov, L. Leksell, Yu.K. Matveev, T. Doi, B.A. Meyerson, K. Nittner, F. Peluso, N. Mutsuga, P.L. Gildenberg, J.H. Dowson, H. Narabayashi, P. Richardson, K. Hartmann-von Monakow, A. Struppler, M. Haider, G. Dieckmann, K. Sugita, F. Erbel, E.P. Petushkov, O. Tzavellas, H. Klasen, T. Nagao, V.A. Iliukhina, A. Takeda, B. Friedel, H.T. Wycis, P.C. Potthoff, F. Mundinger, R. Chow, W. Pontzen, V.B. Gretchin, E. Toivakka, J. Gybels, F.J. Gillingham, L. Laitinen, B.S. Nashold, C.H. Lücking, R. Nakamura, M. Bénita, H. Condé, J. Cophignon, T. Hirota, P. Vogel, J. Tetteh, B. Rümler, G. Ettorre, F. Marossero, E. Groll-Knapp, J. Siegfried, K. Hahn, H. Spuler, W.P. Wilson, G. Kullberg, I.A. Pullar, W. Wahren, B. Stewart, A.N. Bondartchuk, L. Infuso, R. Emmers, H.E. Diemath, B.-E. Roos, D.K. Kambarova, A. Caracalos, B. Rewcastle, Y. Takaoka, E. Gabriel, N.M. Chebotaryova, G. Schaltenbrand, Y.K. Kim, M. Dondey, D. Zivanovic, and P.-E. Almgren

Subjects
business.industry, Medicine, Surgery, Neurology (clinical), business
Published
1972
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16. Discussion on Treatment of Epilepsy and Intractable Pain

Author

O. Tzavellas, B.S. Nashold, B. Stewart, B. Friedel, J. Gybels, R. Nakamura, M. Bénita, N. Mutsuga, V.B. Gretchin, R. Chow, J. Cophignon, W. Wahren, E. Toivakka, A.N. Bondartchuk, B. Rewcastle, H. Klasen, A. Takeda, Y. Takaoka, P. Richardson, J. Siegfried, B.A. Meyerson, K. Nittner, P.C. Potthoff, M. Haider, P. Vogel, C.D. Ray, H.E. Diemath, S. Tóth, K. Sugita, H. Spuler, W. Umbach, A. Struppler, B.-E. Roos, G. Kullberg, D.K. Kambarova, E. Gabriel, N.M. Chebotaryova, V.M. Smirnov, Yu.K. Matveev, L. Infuso, R.M. Lehman, T. Doi, A. Caracalos, F. Erbel, R. Hassler, T. Nagao, K. Vaernet, H. Condé, R. Emmers, F.J. Gillingham, R.R. Tasker, F. Mundinger, L. Laitinen, R. Ahmed, K.A. West, E.P. Petushkov, K. Hartmann-von Monakow, H. Krayenbühl, G.R. Narayanaswamy, C.H. Lücking, A.N. Shandurina, G.R. Haase, N.P. Bechtereva, F. Marossero, V.A. Iliukhina, G. Ettorre, G. Schaltenbrand, H.T. Wycis, W.P. Wilson, D. Zivanovic, P.-E. Almgren, J.A. Ganglberger, T. Hirota, A.L. Andersson, V.K. Pozdeev, Ed. Kandel, G.P. Cabrini, L. Leksell, E.G. Szekely, T. Riechert, P.L. Gildenberg, J.H. Dowson, J. Tetteh, H. Narabayashi, B. Rümler, F. Peluso, I.A. Pullar, D.M.C. Forster, Y.K. Kim, G. Dieckmann, W. Pontzen, E. Groll-Knapp, M. Dondey, and K. Hahn

Subjects
medicine.medical_specialty, Epilepsy, business.industry, Anesthesia, medicine, Surgery, Intractable pain, Neurology (clinical), medicine.disease, business
Published
1972
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17. Discussion on Metabolic and Vegetative Disorders in Parkinsonism

Author

F. Erbel, J. Cophignon, G. Dieckmann, K. Nittner, Ed. Kandel, W. Pontzen, V.A. Iliukhina, B. Rewcastle, G. Ettorre, G.P. Cabrini, Y. Takaoka, F. Peluso, B.S. Nashold, L. Leksell, J. Tetteh, C.D. Ray, B. Rümler, H. Klasen, E. Groll-Knapp, P. Vogel, D.M.C. Forster, P.C. Potthoff, K. Hahn, P. Richardson, P.L. Gildenberg, J.H. Dowson, W. Umbach, R. Chow, H. Condé, G.R. Narayanaswamy, T. Hirota, K.A. West, H. Krayenbühl, D. Zivanovic, N.P. Bechtereva, P.-E. Almgren, R. Ahmed, G. Schaltenbrand, R. Hassler, L. Infuso, R. Emmers, A.N. Shandurina, G.R. Haase, E.P. Petushkov, V.B. Gretchin, K. Sugita, J. Gybels, T. Nagao, F. Mundinger, R. Nakamura, C.H. Lücking, M. Bénita, A. Takeda, V.M. Smirnov, Yu.K. Matveev, T. Doi, E. Toivakka, J.A. Ganglberger, A. Struppler, K. Vaernet, R.R. Tasker, F.J. Gillingham, L. Laitinen, E. Gabriel, N.M. Chebotaryova, B. Stewart, H. Spuler, A.N. Bondartchuk, A.L. Andersson, V.K. Pozdeev, N. Mutsuga, W.P. Wilson, B. Friedel, Y.K. Kim, E.G. Szekely, T. Riechert, M. Dondey, H. Narabayashi, I.A. Pullar, H.E. Diemath, B.A. Meyerson, B.-E. Roos, D.K. Kambarova, A. Caracalos, O. Tzavellas, J. Siegfried, M. Haider, G. Kullberg, S. Tóth, R.M. Lehman, W. Wahren, F. Marossero, H.T. Wycis, and K. Hartmann-von Monakow

Subjects
business.industry, Parkinsonism, Medicine, Surgery, Neurology (clinical), business, medicine.disease, Neuroscience
Published
1972
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18. Control of reaction time performance involves the striatum.

Author

Condé H, Bénita M, Dormont JF, Schmied A, and Cadoret A

Subjects
Animals, Cats, Caudate Nucleus physiopathology, Cold Temperature, Corpus Striatum physiopathology, Humans, Thalamic Nuclei physiopathology, Corpus Striatum physiology, Parkinson Disease physiopathology, Reaction Time physiology
Abstract

Cats were tested for the effect of unilateral cooling of the centre median nucleus of the thalamus (CM) or of the caudate nucleus (Cd) as they performed a simple reaction time schedule. Shortening of reaction time occurred during CM cooling. Lengthening of the reaction time was observed during Cd cooling. Moreover, the Cd cooling was followed after a variable delay of a few minutes by a slowing down of the trial rate, and even by the arrest of performance for the lowest cooling temperature. The subject restarted at will after an arrest period, without motivational or motor disturbances, except for a short period of rotatory behaviour. The arrest period duration was about equal to the arrest period latency. Human subjects suffering from Parkinson's disease were tested with the same reaction time schedule. They showed lengthened reaction times and difficulty to perform reliably more than a ten of trials.

Published
1981

19. Effects of ventrolateral thalamic nucleus cooling on initiation of forelimb ballistic flexion movements by conditioned cats.

Author

Bénita M, Condé H, Dormont JF, and Schmied A

Subjects
Animals, Cats, Dominance, Cerebral physiology, Evoked Potentials, Motor Cortex physiology, Neurons physiology, Reaction Time physiology, Cold Temperature, Conditioning, Psychological physiology, Forelimb innervation, Movement, Muscle Contraction, Thalamic Nuclei physiology
Abstract

Five cats were trained to perform a forelimb ballistic flexion on a reaction time paradigm including an upper limit of about 400 ms for reinforcement (food pellets). They were implanted with a cyrogenic probe thermically insulated, except at the tip, by a vacuum jacket (outer diameter, 1.1 mm). Four cats had the probe inserted into the ventrolateral thalamic nucleus (VL), contralateral to the moving limb. During cooling they showed increased reaction times, which remained constant throughout daily sessions performed during many weeks, independent of the foreperiod but varying from 25 to 100 ms according to the subject. The temperatures used to upset the reaction times varied from +10 decrees C to -8 degrees C, depending on the localisation of the probe and on the insulation of the silver tip used to prevent nervous tissue reaction, but for each subject the reaction times always increased when the temperature was lowered. The fifth cat, with a probe inserted between VL and the Centre Median, showed a decrease of reaction times on cooling to 0 degrees C and an increase of the reaction times for a cooling at -10 degrees C. For one of the four cats with a probe properly inserted into the VL, strain-gauges were stuck on the lever to measure the latency of the decrease of the pressure exerted by the subject when the subject initiated the forelimb flexion in response to the CS. Reaction times and latencies of pressure changes were closely correlated with the movement onset, and they were equally delayed during cooling. This result demonstrates that it is not by slowing down movement velocity that reaction times are upset during VL cooling but by delaying the movement onset.

Published
1979
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21. Scheduled-training of cats to a simple reaction time performance.

Author

Condé H, Dormont JF, Schmied A, and Bénita M

Subjects
Animals, Cats, Computers, Conditioning, Operant physiology, Methods, Reinforcement Schedule, Time Factors, Conditioning, Psychological physiology, Movement
Abstract

Cats were trained to release a lever at the onset of a sound, using a simple reaction time paradigm with different foreperiods. The training of the subjects was controlled by a PDP 8/L computer with a training schedule that avoided the problems of manual shaping except for the preliminary step, the lever press. This schedule successfully trained the cats in about 6 daily sessions up to the reaction time paradigm with a 3 sec criterion. In contrast, a programme designed to reduce the criterion value so as to induce the subjects to perform shorter latency movements failed because the cats learned to control it through an escape procedure.

Published
1978

22. Activity of ventrolateral thalamic neurons in relation to a simple reaction time task in the cat.

Author

Schmied A, Bénita M, Condé H, and Dormont JF

Subjects
Animals, Cats, Conditioning, Psychological physiology, Dominance, Cerebral physiology, Forelimb innervation, Movement, Muscle Contraction, Neurons physiology, Reaction Time physiology, Thalamic Nuclei physiology
Abstract

Unrestrained cats performed ballistic forelimb flexion movements triggered by an auditory stimulus (CS) on a simple reaction time (RT) paradigm. During the variable foreperiod the subject was required to hold down a lever and to release it on presentation of the CS. The RTs ranged from 200 to 300 ms. The activity of single neurons of the ventrolateral nucleus of the thalamus (VL) was recorded bilaterally. More than 40% of the 166 units recorded in the VL contralateral to the performing limb presented, after the CS, changes of activity with a latency less than 100 ms and were classified into three types: (1) Twenty-five units had a short latency transient increase of activity 10 to 30 ms after the CS, followed by a longer increase or decrease in activity. Short latency increase as well as subsequent increase of the firing rate were not correlated to the RTs. (2) Twenty-nine units showed a 40-60 ms latency increase of activity which lasted long enough to continue during the forelimb movement. These units displayed a correlation between the RTs and the mean firing rate measured in the 40-100 ms period after the CS. The more the cells were activated, the shorter the RTs. (3) Fifteen units presented a reciprocal pattern of discharge with respect to the type (2) units. The firing rate decreased with latencies ranging from 20 to 90 ms after the CS. Only 14,5% of the 96 units recorded in the VL ipsilateral to the performing limb presented changes of activity starting in the 100 ms period following the CS. Background firing levels as well as phasic activity were rather low compared to those observed contralaterally. Sixteen units showed burst activity while the cat was performing but burst pattern was not time-related to the task. In an unconditioned animal, a very low level of activity and an absence of modulations were observed in both VLs.

Published
1979
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24. [Studies on the efferences from the nucleus medialis of the thalamus to the cortex and strio-pallidal structures in cats].

Author

Bénita M and Condé H

Subjects
Amygdala physiology, Animals, Axons physiology, Cats, Caudate Nucleus physiology, Cold Temperature, Electric Stimulation, Electrocoagulation, Electrophysiology, Evoked Potentials, Pain, Reflex, Basal Ganglia physiology, Globus Pallidus physiology, Somatosensory Cortex physiology, Thalamic Nuclei physiology
Published
1971
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26. Intranuclear organization of the centre médian nucleus of thalamus.

Author

Bénita M and Condé H

Subjects
Animals, Cats, Electric Stimulation, Evoked Potentials, Models, Theoretical, Neurons, Efferent physiology, Reticular Formation cytology, Thalamic Nuclei cytology, Thalamus physiology, Time Factors, Thalamic Nuclei physiology
Published
1972

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