W. J. Mollevanger

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The synthetic opiate D-Alaninemethionine enkephalin (D-Ala) affects neuronal activity of the fascia dentata (FD). D-Ala causes a depression of the population spike evoked by stimulation of the perforant path, which is antagonized by naloxone. In so called “Tandem” experiments it was shown that D-Ala had opposite effects on the CA1 pyramidal and FD granule(More)
Hippocampal responses to electrical stimulation of the prepyriform cortex in the cat were studied both in acute experiments under halothane anesthesia and in awake cats with chronically indwelling electrodes. Analysis of field potentials and unit activity indicated the extent to which different hippocampal subareas were activated, the laminar level at which(More)
Hippocampal EEG changes in response to stimulation of several mesodiencephalic inputs (mesodiencephalic reticular formation, MRF; medial and lateral hypothalamus, MH and LH; medial septum, MS) were quantitatively investigated by means of spectral analysis in cats with chronically indwelling electrodes. The rhythmic activity of the hippocampus, in the theta(More)
Conduction velocities (c.vs) of different hippocampal fibre groups have been measured in slices in vitro. In the mossy fibres, Schaffer collaterals and Str. oriens fibres the c.v. varied from 0.36–0.38 m/s; in the alveus c.v. was 1.20 m/s. In the perforant path (p.p.) two groups of c.vs were found: in the medial p.p. the mean (± s.e) c.v. was 0.32 ± 0.02(More)
Slices of rat brain hippocampus were tetanized in the perforant path fibers. In individual slices long-term changes of the electrophysiological parameters were determined simultaneously with post hoc endogeneous phosphorylation of proteins in a lyzed crude mitochondrial/synaptosomal fraction. A quantitative relation between the electrophysiological(More)
In a group of 21 cats, the middle cerebral artery pressure (MCAP) was recorded by means of a catheter introduced into the artery at its origin, just distal to the occlusion. The effects of hypertension, hypercapnia, and hypocapnia were studied. In a group of five cats, both middle cerebral arteries (MCA) were catheterized and the pressure was recorded(More)
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