Results 51 to 60 of about 40,448 (203)

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, Vojtěch Trávníček, Jonathan Curot, Martin Pail, Monika Służewska‐Niedźwiedź, Robert Roman, Filip Plešinger, Emmanuel Barbeau, Michal Kucewicz, Petr Klimeš, Jan Cimbálník, Pavel Jurák, William C. Stacey, Gregory A. Worrell   +13 more
wiley   +1 more source

Involvement of the hippocampus, amygdala, entorhinal cortex and posterior parietal cortex in memory consolidation

Brazilian Journal of Medical and Biological Research, 1997
A total of 182 young adult male Wistar rats were bilaterally implanted with cannulae into the CA1 region of the dorsal hippocampus and into the amygdaloid nucleus, the entorhinal cortex, and the posterior parietal cortex. After recovery, the animals were
M.S. Zanatta, J.H. Quillfeldt, E. Schaeffer, P.K. Schmitz, J. Quevedo, J.H. Medina, I. Izquierdo   +6 more
doaj   +1 more source

Paroxysmal slow waves mark ictal networks

Epilepsia, EarlyView.
Abstract Objective Epilepsy diagnosis and treatment monitoring are hindered by the episodic, heterogeneous expression of seizures and by normal‐appearing scalp electroencephalography (EEG) in many patients. We previously described paroxysmal slow‐wave events (PSWEs), brief epochs of broadband slowing detectable on EEG in people with epilepsy.
Florent J. M. Boyer‐Aymé, Hamza Imtiaz, Ofer Prager, Evyatar Swissa, Alaa Abu Ahmad, Yonatan Serlin, Refat Aboghazleh, Ilan Goldberg, Maayan Ben nun Caller, Idit Tamir, Oded Shor, Ben Whatley, Felix Benninger, Alon Friedman   +13 more
wiley   +1 more source

Speed cells in the medial entorhinal cortex

Nature, 2015
Grid cells in the medial entorhinal cortex have spatial firing fields that repeat periodically in a hexagonal pattern. When animals move, activity is translated between grid cells in accordance with the animal's displacement in the environment. For this translation to occur, grid cells must have continuous access to information about instantaneous ...
Emilio Kropff, James E. Carmichael, May-Britt Moser, Edvard I. Moser   +3 more
openaire   +3 more sources

Anatomy and Function of the Primate Entorhinal Cortex

Annual Review of Vision Science, 2020
The entorhinal cortex (EC) is a critical element of the hippocampal formation located within the medial temporal lobe (MTL) in primates. The EC has historically received attention for being the primary mediator of cortical information going into and coming from the hippocampus proper.
Garcia, Aaron D, Buffalo, Elizabeth A
openaire   +2 more sources

Trajectory Encoding in the Hippocampus and Entorhinal Cortex [PDF]

Neuron, 2000
We recorded from single neurons in the hippocampus and entorhinal cortex (EC) of rats to investigate the role of these structures in navigation and memory representation. Our results revealed two novel phenomena: first, many cells in CA1 and the EC fired at significantly different rates when the animal was in the same position depending on where the ...
Frank, Loren M, Brown, Emery N, Wilson, Matthew   +2 more
openaire   +2 more sources

Basal forebrain degeneration precedes and predicts the cortical spread of Alzheimer’s pathology

Nature Communications, 2016
Whether Alzheimer’s disease originates in basal forebrain or entorhinal cortex remains highly debated. Here the authors use structural magnetic resonance data from a longitudinal sample of participants stratified by cerebrospinal biomarker and clinical ...
Taylor W. Schmitz, R. Nathan Spreng, The Alzheimer's Disease Neuroimaging Initiative   +2 more
doaj   +1 more source

Two Alzheimer’s disease risk genes increase entorhinal cortex volume in young adults

Frontiers in Human Neuroscience, 2014
Alzheimer’s disease (AD) risk genes alter brain structure and function decades before disease onset. Apolipoprotein E (APOE) is the strongest known genetic risk factor for Alzheimer’s disease, and a related gene, apolipoprotein J (APOJ), also affects ...
Amanda Marie Dibattista, Benson W Stevens, Benson W Stevens, G William Rebeck, Adam E. Green   +4 more
doaj   +1 more source

Timing is everything: The effect of early‐life seizures on developing neuronal circuits subserving spatial memory

Epilepsia Open, EarlyView.
Abstract Spatial memory, the aspect of memory involving encoding and retrieval of information regarding one's environment and spatial orientation, is a complex biological function incorporating multiple neuronal networks. Hippocampus‐dependent spatial memory is not innate and emerges during development in both humans and rodents.
Gregory L. Holmes
wiley   +1 more source

Predictive grid cells: Future spatial representations in the hippocampal-entorhinal circuit

Neuroscience Research
Place cells in the hippocampus and grid cells in the entorhinal cortex have long been interpreted as neural representations of an animal’s current location in space. However, an increasing amount of theoretical and experimental evidence suggests that the
Ayako Ouchi
doaj   +1 more source