Neuronal rebound spiking, resonance frequency and theta
... Figure 1. (a(i)) Experimental data showing the membrane potential of a layer II medial entorhinal cortex stellate cell during resonance testing (data in (a(i)(ii)) gathered by Shay [37]). In response to oscillating current injection that increases in frequency, the neuron shows a gradual increase in ...
... Figure 1. (a(i)) Experimental data showing the membrane potential of a layer II medial entorhinal cortex stellate cell during resonance testing (data in (a(i)(ii)) gathered by Shay [37]). In response to oscillating current injection that increases in frequency, the neuron shows a gradual increase in ...
A PRIMER ON EEG AND RELATED MEASURES OF BRAIN ACTIVITY
... digitization. Fig. 2a shows three EEG epochs. Suppose that for each of the three epochs a stimulus had been presented at the beginning of the trace. Fig. 2b shows how signal averaging goes about. For each of the three epochs (trials) samples are taken at fixed time intervals, resulting in a time ser ...
... digitization. Fig. 2a shows three EEG epochs. Suppose that for each of the three epochs a stimulus had been presented at the beginning of the trace. Fig. 2b shows how signal averaging goes about. For each of the three epochs (trials) samples are taken at fixed time intervals, resulting in a time ser ...
Role of Active Movement in Place-Specific Firing of Hippocampal
... open the possibility that hippocampal neurons may actively discharge during passive movement if rats are not physically restrained. Indeed, a more recent study has shown that place cells do not shut off under a less restrained condition. In this study, rats were passively moved on a mobile robot wit ...
... open the possibility that hippocampal neurons may actively discharge during passive movement if rats are not physically restrained. Indeed, a more recent study has shown that place cells do not shut off under a less restrained condition. In this study, rats were passively moved on a mobile robot wit ...
ARTICLE IN PRESS
... data provides a compelling argument that many of the capacities for episodic memory shown in humans can be found in animals [36]. In addition, electrophysiological recordings from animals show phenomena that support the existence of mental time travel along previously experienced trajectories [93,10 ...
... data provides a compelling argument that many of the capacities for episodic memory shown in humans can be found in animals [36]. In addition, electrophysiological recordings from animals show phenomena that support the existence of mental time travel along previously experienced trajectories [93,10 ...
Volume and Number of Neurons of the Human
... Indexing terms: cortex; memory; stereology; neurobiology ...
... Indexing terms: cortex; memory; stereology; neurobiology ...
Hippocampus duality: memory and novelty detection are subserved
... to OB targets and famous faces recorded along successive contacts of an electrode implanted in the hippocampus in Patient 1. Both tasks elicited a negative component culminating at 200 ms (N2). Its amplitude (larger for the famous faces task) and polarity did not vary across the successive contacts ...
... to OB targets and famous faces recorded along successive contacts of an electrode implanted in the hippocampus in Patient 1. Both tasks elicited a negative component culminating at 200 ms (N2). Its amplitude (larger for the famous faces task) and polarity did not vary across the successive contacts ...
Hippocampus, hippocampal sclerosis and epilepsy
... “latency” of these interneurons is due to the lack of their physiological stimulation by damaged hilar mossy cells [88]. In addition to neuronal degeneration and gliosis, the so called mossy fiber sprouting and the dentate gyrus granule cell dispersion are also characteristic of HS [14]. They consti ...
... “latency” of these interneurons is due to the lack of their physiological stimulation by damaged hilar mossy cells [88]. In addition to neuronal degeneration and gliosis, the so called mossy fiber sprouting and the dentate gyrus granule cell dispersion are also characteristic of HS [14]. They consti ...
Desired EEG Signals For Detecting Brain Tumor Using Indu Sekhar Samant
... physiological functioning of the brain as a whole both at the time of initial diagnosis or as part of a long term management of the patient. ...
... physiological functioning of the brain as a whole both at the time of initial diagnosis or as part of a long term management of the patient. ...
Neuron Production, Neuron Number, and Structure Size Are
... same BrdU injection regimen as the chickadees used in this study were sectioned and processed along with six of the chickadee brains. All positive control sections examined demonstrated clear labeling of cells at frequencies similar to those reported in another juvenile bird (Ling, Zuo, AlvarezBuyll ...
... same BrdU injection regimen as the chickadees used in this study were sectioned and processed along with six of the chickadee brains. All positive control sections examined demonstrated clear labeling of cells at frequencies similar to those reported in another juvenile bird (Ling, Zuo, AlvarezBuyll ...
Synaptic Targets of Medial Septal Projections in the Hippocampus
... glutaraldehyde for PHAL-injected mice and with 0.3% glutaraldehyde for two AAV-injected PV-Cre mice (animals GU41 and GU42). Following overnight postfixation in a glutaraldehyde-free fixative, brains were washed thoroughly in 0.1 M PB and sectioned coronally or horizontally at 60 – 80 m thickness u ...
... glutaraldehyde for PHAL-injected mice and with 0.3% glutaraldehyde for two AAV-injected PV-Cre mice (animals GU41 and GU42). Following overnight postfixation in a glutaraldehyde-free fixative, brains were washed thoroughly in 0.1 M PB and sectioned coronally or horizontally at 60 – 80 m thickness u ...
Occlusion and brain function: mastication as a prevention of
... the hippocampal function, leading to a gradual decline (39, 40). At this stage, elimination of sensory input from the masticatory organ may accelerate the senile process in the hippocampus. As the hippocampus is one of the target brain regions of stress hormone corticosteroids regulating its negativ ...
... the hippocampal function, leading to a gradual decline (39, 40). At this stage, elimination of sensory input from the masticatory organ may accelerate the senile process in the hippocampus. As the hippocampus is one of the target brain regions of stress hormone corticosteroids regulating its negativ ...
Lab 6
... Neurons in the brain can impact all aspects of human life including completing motor activities, performing mental thought, memories, and dreaming. The electroencephalogram (EEG) is a recording from the surface of the scalp generated by many biopotentials in the cerebrum of the brain. More specifica ...
... Neurons in the brain can impact all aspects of human life including completing motor activities, performing mental thought, memories, and dreaming. The electroencephalogram (EEG) is a recording from the surface of the scalp generated by many biopotentials in the cerebrum of the brain. More specifica ...
Impaired synaptic transmission was also observed in the DG in
... appropriate animal models of adrenal insufficiency accompanied by relatively chronic hyponatremia. Although many studies on cell degradation or apoptosis in the hippocampus following bilateral adrenalectomy (ADX) have been reported, animals in those studies were given saline after ADX to avoid decr ...
... appropriate animal models of adrenal insufficiency accompanied by relatively chronic hyponatremia. Although many studies on cell degradation or apoptosis in the hippocampus following bilateral adrenalectomy (ADX) have been reported, animals in those studies were given saline after ADX to avoid decr ...
Electroencephalogram based Brain
... P300 visual evoked potential (VEP) is another type of EEG that is evoked around 300-600 ms after visual stimulus onset (hence the term P300) and is maximal is midline locations (such as Fz, Cz and Pz). The potential is limited to 8 Hz and hence a low pass filter is normally used to filter VEP prior ...
... P300 visual evoked potential (VEP) is another type of EEG that is evoked around 300-600 ms after visual stimulus onset (hence the term P300) and is maximal is midline locations (such as Fz, Cz and Pz). The potential is limited to 8 Hz and hence a low pass filter is normally used to filter VEP prior ...
Zola-Morgan et al. 1986
... damage in these cases has not usually been confined to the hippocampus, and the status of memory functions has often been based on incomplete neuropsychological information. Thus, the human cases have until now left some uncertainty as to whether lesions limited to the hippocampus are sufficient to ...
... damage in these cases has not usually been confined to the hippocampus, and the status of memory functions has often been based on incomplete neuropsychological information. Thus, the human cases have until now left some uncertainty as to whether lesions limited to the hippocampus are sufficient to ...
521 THE CHOLINERGIC LIMBIC SYSTEM: PROJECTIONS TO
... replacing them with high frequency low amplitude activity, but also produces a synchronized hippocampal EEG, with slow high amplitude waves (e rhythm: Jung and Kommuller, 1938; Green and Arduini, 1954), on which fast activity may be superimposed. The significance, however, of these different pattern ...
... replacing them with high frequency low amplitude activity, but also produces a synchronized hippocampal EEG, with slow high amplitude waves (e rhythm: Jung and Kommuller, 1938; Green and Arduini, 1954), on which fast activity may be superimposed. The significance, however, of these different pattern ...
How the hippocampus preserves order: the role of
... cycle have been found to fire at earlier phases of theta as the rodent repeatedly traverses a track or maze. This process, dubbed ‘theta phase precession’, is interpreted as evidence for a prospective code in the hippocampus that may be used to predict upcoming locations [70]. Furthermore, represent ...
... cycle have been found to fire at earlier phases of theta as the rodent repeatedly traverses a track or maze. This process, dubbed ‘theta phase precession’, is interpreted as evidence for a prospective code in the hippocampus that may be used to predict upcoming locations [70]. Furthermore, represent ...
Validation of hippocampal volumes measured using a
... 1.000). In the test of agreement between the volumetric methods, the ICCs were right 0.846 and left 0.848 (manual and FreeSurfer), and right 0.654 and left 0.717 (manual and IBASPM). Conclusion The automated hippocampal volumetric methods showed good agreement with manual hippocampal volumetry, but ...
... 1.000). In the test of agreement between the volumetric methods, the ICCs were right 0.846 and left 0.848 (manual and FreeSurfer), and right 0.654 and left 0.717 (manual and IBASPM). Conclusion The automated hippocampal volumetric methods showed good agreement with manual hippocampal volumetry, but ...
Suzuki and Eichenbaum, 2000
... all projections (except those between the different subregions of the hippocampal formation) are strongly reciprocal. For example, the perirhinal and parahippocampal cortices not only have strong and reciprocal connections with the entorhinal cortex, but also have weaker interconnections with the CA ...
... all projections (except those between the different subregions of the hippocampal formation) are strongly reciprocal. For example, the perirhinal and parahippocampal cortices not only have strong and reciprocal connections with the entorhinal cortex, but also have weaker interconnections with the CA ...
ARTICLE IN PRESS Neural Networks entorhinal cortex
... cortex demonstrate the capacity to display persistent spiking activity after a depolarizing current injection or a period of repetitive synaptic input (Egorov, Hamam, Fransen, Hasselmo, & Alonso, 2002; Fransén, Tahvildari, Egorov, Hasselmo, & Alonso, 2006; Klink & Alonso, 1997; Tahvildari, Fransen, ...
... cortex demonstrate the capacity to display persistent spiking activity after a depolarizing current injection or a period of repetitive synaptic input (Egorov, Hamam, Fransen, Hasselmo, & Alonso, 2002; Fransén, Tahvildari, Egorov, Hasselmo, & Alonso, 2006; Klink & Alonso, 1997; Tahvildari, Fransen, ...
Power Shifts Track Serial Position and Modulate Encoding in
... of subsequent recall, a t-statistic was calculated comparing the distribution of mean Z-transformed wavelet power for all events where the word was subsequently recalled and the distribution of powers for the presentation of words that were not subsequently recalled. This “subsequent memory effect” ...
... of subsequent recall, a t-statistic was calculated comparing the distribution of mean Z-transformed wavelet power for all events where the word was subsequently recalled and the distribution of powers for the presentation of words that were not subsequently recalled. This “subsequent memory effect” ...
CONTROL OF MOVEMENT BY THE BRAIN A. PRIMARY MOTOR
... __________________________ Early passive theory of sleep (Bremer, 1936) were quickly discarded in favor of more active sleep mechanisms in the brain -Moruzzi and Magoun (1949) electrically stimulated the “pontine reticular formation” in sleeping cats to either produce a desynchronized EEG in anesthe ...
... __________________________ Early passive theory of sleep (Bremer, 1936) were quickly discarded in favor of more active sleep mechanisms in the brain -Moruzzi and Magoun (1949) electrically stimulated the “pontine reticular formation” in sleeping cats to either produce a desynchronized EEG in anesthe ...
Spindle-Like Thalamocortical Synchronization in a Rat Brain Slice
... Kynurenic acid was applied close to the site from which field potential recordings were obtained. Moreover, to limit possible activity-dependent variabilities in oscillation shape and/or duration, we used stimuli delivered every 10 –30 s, and we avoided the occurrence of stimuli immediately after a ...
... Kynurenic acid was applied close to the site from which field potential recordings were obtained. Moreover, to limit possible activity-dependent variabilities in oscillation shape and/or duration, we used stimuli delivered every 10 –30 s, and we avoided the occurrence of stimuli immediately after a ...
“Epileptic Neurons” in Temporal Lobe Epilepsy
... 53). This holds true despite the fact that the intrinsic discharge behavior of hippocampal neurons has been thought important in synchronization processes. In modeling studies, neurons that generate a high-frequency burst of action potentials as their minimal response to threshold stimulation, and p ...
... 53). This holds true despite the fact that the intrinsic discharge behavior of hippocampal neurons has been thought important in synchronization processes. In modeling studies, neurons that generate a high-frequency burst of action potentials as their minimal response to threshold stimulation, and p ...