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In order to investigate the basic cellular mechanisms involved in neuronal interactions within the striatum, we prepared a primary striatal cell culture from rat fetal brain in chemically defined medium. Using morphological and whole-cell recording methods, we observed that an intensive neuritic elongation with a progressive build up of a sodium-dependent(More)
The VD1 and RPD2 neurons of Lymnaea stagnalis innervate other central neurons, certain skin areas, the pneumostome area, and the auricle of the heart. Recently, a set of four (λ, ω, α, β) neuropeptides produced by these giant neurons and by certain other central neurons has been characterized. Although alternative splicing of the preprohormone of these(More)
Two interneurons modulating the firing pattern of two endogeneous bursting neurons have been identified in the visceral ganglion. They are characterized by large depolarizing afterpotentials and doublets due to the delayed firing of a dense layer of terminal processes converging onto the axon branches from the two bursters. Firing of the terminal processes(More)
The mechanism by which an identified interneuron modulates bursting activity was studied in the mollusc Helix pomatia. Firing of the interneuron was found to enhance endogenous bursting activity by causing a slow, persistent decrease in resting K-conductance, leading to a relative increase in the effectiveness of the burst-generating mechanism.
We describe the anatomical and electrophysiological characteristics of a group of Helix nerve cells, styled P cells, that generate long-lasting depolarizations in response to repeated stimulations at low frequencies. Four neurones were identified in the perioesophageal ganglia of the snail Helix pomatia. Their structure was determined by intracellular(More)
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