Read e-book online Brain and Conscious Experience: Study Week September 28 to PDF

By M. L. Colonnier (auth.), John C. Eccles (eds.)

ISBN-10: 3642491685

ISBN-13: 9783642491689

ISBN-10: 3642491707

ISBN-13: 9783642491702

The making plans of this examine Week on the Pontifical Academy of technology from September 28 to October four, 1964, begun simply years sooner than while the President, Professor Lemaitre, requested me if 1 will be chargeable for a examine Week referring to Psychology to what we may well name the Neurosciences. 1 authorised this accountability at the knowing that 1 can have as­ sistance from colleagues within the Academy, Professors Heymans and Chagas. in addition to partaking within the learn Week they gave me a lot­ wanted suggestions and suggestion within the hard and, now and then, complicated job that 1 had undertaken, and 1 gratefully recognize my indebtedness to them. notwithstanding there were lately many symposia inquisitive about the so-called larger features of the mind, for instance with percep­ tion, studying and conditioning, and with the processing of knowledge within the mind, there has to my wisdom been no symposium in particular with mind features and awareness because the memorable treating Laurentian convention of 1953, which was once later released in 1954 because the ebook, "Brain Mechanisms and Consciousness.

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Extra info for Brain and Conscious Experience: Study Week September 28 to October 4, 1964, of the Pontificia Academia Scientiarum

Example text

Time line is at zero potential. (E,F) Another cell with repetitive stimulation at 78 per sec to show build up of synaptically induced depolarization to a level at which antidromic spikes failed partially and then completely [Phillips, 1961]. currents to cortical pyramidal cells. In Fig. 2 electric currents of 200 msec duration and of the specified intensities were applied to a pyramidal tract cell. The responses very closely resemble those obtained by Granit, Kernell, and Shortess [1963] with the tonic variety of rat and cat motoneurons.

Eccles C]TIT r::JI D . . 10m sec E F . •.... :...... ',,::~:... ]. 1Omse c Fig. 1. Intracellular records of responses evoked in neocortical pyramidal cells in response to repetitive stimulation of the pyramidal tract. 4 msec interval. In A there is a clear inflection on the rising phase indicating a delay in antidromic transmission between the initial segment (IS) and somadendrite (SD) components of the pyramidal cell, while in B the SD response failed. As indicated, the membrane potential was -49 mY.

COLONNIER: The point I wanted to make was that the long axis of the tangentially elongated stellate cells of the IVth layer of the visual cortex tend to be orientated mainly along the vertical axis of the cortical retina. This is the difficulty when one tries to relate these elongated fields to the work of The Structural Design of the Neocortex / 21 Rubel and Wiesel. They do not find that the slit-like visual fields of the cortical cells have a preferential orientation. The visual fields are orientated in all directions.

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Brain and Conscious Experience: Study Week September 28 to October 4, 1964, of the Pontificia Academia Scientiarum by M. L. Colonnier (auth.), John C. Eccles (eds.)


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