@article{MTMT:31980426,
	title = {Gamma rhythm communication between entorhinal cortex and dentate gyrus neuronal assemblies},
	url = {https://m2.mtmt.hu/api/publication/31980426},
	author = {Fernández-Ruiz, A. and Oliva, A. and Soula, M. and Rocha-Almeida, F. and Nagy, Attila Gergő and Martin-Vazquez, G. and Buzsáki, G.},
	doi = {10.1126/science.abf3119},
	journal-iso = {SCIENCE},
	journal = {SCIENCE},
	volume = {372},
	unique-id = {31980426},
	issn = {0036-8075},
	abstract = {Gamma oscillations are thought to coordinate the spike timing of functionally specialized neuronal ensembles across brain regions. To test this hypothesis, we optogenetically perturbed gamma spike timing in the rat medial (MEC) and lateral (LEC) entorhinal cortices and found impairments in spatial and object learning tasks, respectively. MEC and LEC were synchronized with the hippocampal dentate gyrus through high- and low-gamma-frequency rhythms, respectively, and engaged either granule cells or mossy cells and CA3 pyramidal cells in a task-dependent manner. Gamma perturbation disrupted the learning-induced assembly organization of target neurons. Our findings imply that pathway-specific gamma oscillations route task-relevant information between distinct neuronal subpopulations in the entorhinal-hippocampal circuit. We hypothesize that interregional gamma-time-scale spike coordination is a mechanism of neuronal communication. Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works},
	keywords = {Brain; Animals; Male; Male; NEURONS; CELL; RATS; ARTICLE; RECALL; animal; Neural Pathways; physiology; controlled study; nonhuman; animal experiment; animal cell; spatial orientation; oscillation; learning; learning; learning; learning; HIPPOCAMPAL CA3 REGION; PYRAMIDAL CELLS; ENTORHINAL CORTEX; ENTORHINAL CORTEX; ENTORHINAL CORTEX; nerve cell; spike; Action Potentials; action potential; Maze Learning; dentate gyrus; dentate gyrus; dentate gyrus; Spatial learning; Spatial learning; Rats, Long-Evans; pyramidal nerve cell; maze test; rodent; Mental Recall; gamma rhythm; gamma rhythm; granule cell; nerve tract; spatial analysis; coordinate; Spatial navigation; optogenetics; optogenetics; Long Evans rat; rat},
	year = {2021},
	eissn = {1095-9203},
	orcid-numbers = {Nagy, Attila Gergő/0000-0001-5525-7872}
}

@article{MTMT:1428425,
	title = {Dentate EEG spikes and associated interneuronal population bursts in the hippocampal hilar region of the rat},
	url = {https://m2.mtmt.hu/api/publication/1428425},
	author = {BRAGIN, A and Jandó, Gábor and Nádasdy, Zoltán and VANLANDEGHEM, M and Buzsáki, György},
	doi = {10.1152/jn.1995.73.4.1691},
	journal-iso = {J NEUROPHYSIOL},
	journal = {JOURNAL OF NEUROPHYSIOLOGY},
	volume = {73},
	unique-id = {1428425},
	issn = {0022-3077},
	abstract = {1. This paper describes two novel population patterns in the dentate gyrus of the awake rat, termed type 1 and type 2 dentate spikes (DS1, DS2). Their cellular generation and spatial distribution were examined by simultaneous recording of field potentials and unit activity using multiple-site silicon probes and wire electrode arrays. 2. Dentate spikes were large amplitude (2-4 mV), short duration (<30 ms) field potentials that occurred sparsely during behavioral immobility and slow-wave sleep. Current-source density analysis revealed large sinks in the outer (DS1) and middle (DS2) thirds of the dentate molecular layer, respectively. DS1 and DS2 had similar longitudinal, lateral, and interhemispheric synchrony. 3. Dentate spikes invariably were coupled to synchronous population bursts of putative hilar interneurons. CA3 pyramidal cells, on the other hand were suppressed during dentate spikes. 4. After bilateral removal of the entorhinal cortex, dentate spikes disappeared, whereas sharp wave-associated bursts, reflecting synchronous discharge of the CA3-CA1 network, increased several fold. 5. These physiological characteristics of the dentate spikes sug gest that they are triggered by a population burst of layer II stellate cells of the lateral (DS1) and medial (DS2) entorhinal cortex. 6. We suggest that dentate spike-associated synchronized bursts of hilar-region interneurons provide a suppressive effect on the excitability of the CA3-CA1 network in the intact brain.},
	keywords = {STIMULATION; NEURONS; RESPONSES; CORTEX; organization; POTENTIALS; PYRAMIDAL CELLS; OSCILLATIONS; SLICE; SOURCE-DENSITY ANALYSIS},
	year = {1995},
	eissn = {1522-1598},
	pages = {1691-1705},
	orcid-numbers = {Nádasdy, Zoltán/0000-0002-6515-9683}
}