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Ultrafast oscillations in the human brain and their functional significance
Epilepsia, EarlyView.Abstract Objective The upper frequency limit of human brain activity remains unknown. Using ultrahigh sampling rate (≥20 kHz) intracranial microelectroencephalography, this study aimed to systematically explore and quantitatively characterize brain field oscillations beyond the established high‐frequency oscillation range (>2 kHz), and to determine ...
Milan Brázdil +13 more
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Activity-dependent expression of Fezf2 regulates inhibitory synapse formation in pyramidal cells
Kroon T +5 more
europepmc +1 more source
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Ratio of pyramidal cells versus non-pyramidal cells in sector CA1 of the human Ammon's horn
Anatomy and Embryology, 1985Combined Golgi/pigment studies revealed that pyramidal neurons and non-pyramidal cells of the Ammon's horn of the human adult can be distinguished from each other by their characteristic lipofuscin pigment deposits. In sector CA1, both the typical pyramidal neurons and the modified forms of pyramidal cells contain a modest amount of fine lipofuscin ...
H Braak, Braak Heiko
exaly +3 more sources
Somatostatin hyperpolarizes hippocampal pyramidal cells in vitro
Brain Research, 1981Superfusion onto hippocampal slices of low concentrations of the tetradecapeptide somatostatin (SS), or an SS analogue having CNS activity, reversibly hyperpolarized pyramidal neurons, as revealed by intracellular recording. The hyperpolarizations were accompanied by reductions in spontaneous and evoked spike discharge and in input resistance; the ...
Quentin J Pittman, G R Siggins
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A comparison of rat hippocampal mossy cells and CA3c pyramidal cells
Journal of Neurophysiology, 1993 1. There is a long-standing debate about whether the large spiny cells in the hilar region of the hippocampus should be classified as pyramidal cells of Ammon's horn or as a distinct cell type of the dentate gyrus. The rationale for grouping these hilar neurons (termed "mossy cells") with pyramidal cells of Ammon's horn is shared characteristics.
P S, Buckmaster +2 more
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Regulating firing rate of networks of pyramidal cells
Neurocomputing, 2001 Abstract In a minimal network model consisting of two pyramidal cells and one interneuron, we show how excitation and inhibition cooperate to produce firing rate changes in pyramidal cells that are consistent with observed place cell firing in region CA3 of the hippocampus. We show that inhibition from a common interneuron can synchronize networks of
Victoria Booth, Amitabha Bose
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Effect of phencyclidines on hippocampal pyramidal cells
Brain Research, 1982Phencyclidine (PCP) and several behaviorally active or inactive structural analogs were administered i.v. to urethane-anesthetized rats in order to determine their effects on CA1 pyramidal cell discharges elicited by contralateral CA3 (cCA3) stimulation.
J L, Stringer, P G, Guyenet
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The effect of muscimol on hippocampal pyramidal cells
European Journal of Pharmacology, 1979The effects of muscimol on rabbit hippocampal pyramidal cell firing were studied and compared after iontophoretic, topical, and intravenous administration of the drug. All modes of application resulted in a bicuculline-sensitive, strychnine-insensitive, depression of the monosynaptically activated population spike evoked by micro-stimulation of the ...
J, Defrance +3 more
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Granulovacuolar degeneration in pyramidal cells of the hippocampus
Acta Neuropathologica, 1978We have shown that as the number of granulovacuolar bodies in affected pyramidal cells of the hippocampus increases so cytoplasmic RNA contant is reduced. Prior to its degeration, the nucleolus is increased in volume while that of the nucleus remains unchanged in size throughout.
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Preservation of hippocampal pyramidal cells in paraphrenia
Schizophrenia Research, 2003A recent article classifies paraphrenia within the tauopathy spectrum [Acta Neuropathol., 103 (2002) 313]. More specifically, neurofibrillary changes appear restricted to the hippocampus and are accompanied by scant amyloid deposition. The present study adds the preservation of hippocampal (CA1) pyramidal cell numbers to the neuropathological findings ...
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