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ROBERT J. s AND SPIKE TIMOTHY Department of Neurological Surgery, College of Physicians University, New York City for publication March and Surgeons, Columbia (Received 25, 1965) PREVIOUS ONTOGENETIC STUDIES from this laboratory have been concerned largely with attempts to relate changes in evoked cortical potentials to the development of and axodendritic and axosomatic synaptic systems in feline cerebral and cerebellar cortex (27,28,32,33,39, SO). Although these correlative studies have provided some information on the morphogenetic events associated with developmental alterations in different components of evoked potentials, few results have been obtained which bear directly on the of and synaptic processes in the immature brain. The present report supplies data relevant to this problem. Intracellular recording from in the sensorimotor cortex of young kittens has been carried out with two objectives in mind: 1) to elucidate the major characteristics of postsynaptic potentials evoked in immature neocortical by specific thalamocortical afferents, and 2) to compare patterns of evoked synaptic activities and spike discharges with similar data obtained in intracellular studies of specific thalamocortical responses in of adult animals (1, H-22, 24, 36, 38, 40). METHODS Experiments were carried out in kittens ranging in age from newborn to 1 month old. The
Journal of Neurophysiology – The American Physiological Society
Published: Sep 1, 1965
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