@article{MTMT:2717967,
	title = {Evoked effective connectivity of the human neocortex},
	url = {https://m2.mtmt.hu/api/publication/2717967},
	author = {Entz, László and Tóth, Emília and Keller, CJ and Bickel, S and Groppe, DM and Fabó, Dániel and Kozák, Lajos Rudolf and Erőss, Loránd and Ulbert, István and Mehta, AD},
	doi = {10.1002/hbm.22581},
	journal-iso = {HUM BRAIN MAPP},
	journal = {HUMAN BRAIN MAPPING},
	volume = {35},
	unique-id = {2717967},
	issn = {1065-9471},
	abstract = {The role of cortical connectivity in brain function and pathology is increasingly being recognized. While in vivo magnetic resonance imaging studies have provided important insights into anatomical and functional connectivity, these methodologies are limited in their ability to detect electrophysiological activity and the causal relationships that underlie effective connectivity. Here, we describe results of cortico-cortical evoked potential (CCEP) mapping using single pulse electrical stimulation in 25 patients undergoing seizure monitoring with subdural electrode arrays. Mapping was performed by stimulating adjacent electrode pairs and recording CCEPs from the remainder of the electrode array. CCEPs reliably revealed functional networks and showed an inverse relationship to distance between sites. Coregistration to Brodmann areas (BA) permitted group analysis. Connections were frequently directional with 43% of early responses and 50% of late responses of connections reflecting relative dominance of incoming or outgoing connections. The most consistent connections were seen as outgoing from motor cortex, BA6-BA9, somatosensory (SS) cortex, anterior cingulate cortex, and Broca's area. Network topology revealed motor, SS, and premotor cortices along with BA9 and BA10 and language areas to serve as hubs for cortical connections. BA20 and BA39 demonstrated the most consistent dominance of outdegree connections, while BA5, BA7, auditory cortex, and anterior cingulum demonstrated relatively greater indegree. This multicenter, large-scale, directional study of local and long-range cortical connectivity using direct recordings from awake, humans will aid the interpretation of noninvasive functional connectome studies. Hum Brain Mapp, 2014. (c) 2014 Wiley Periodicals, Inc.},
	year = {2014},
	eissn = {1097-0193},
	pages = {5736-5753},
	orcid-numbers = {Fabó, Dániel/0000-0001-5141-5351; Kozák, Lajos Rudolf/0000-0003-0368-3663; Erőss, Loránd/0000-0002-5796-5546; Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:3359032,
	title = {gamma-oscillations modulated by picture naming and word reading: intracranial recording in epileptic patients.},
	url = {https://m2.mtmt.hu/api/publication/3359032},
	author = {Wu, HC and Nagasawa, T and Brown, EC and Juhász, Csaba and Rothermel, R and Hoechstetter, K and Shah, A and Mittal, S and Fuerst, D and Sood, S and Asano, E},
	doi = {10.1016/j.clinph.2011.03.011},
	journal-iso = {CLIN NEUROPHYSIOL},
	journal = {CLINICAL NEUROPHYSIOLOGY},
	volume = {122},
	unique-id = {3359032},
	issn = {1388-2457},
	abstract = {OBJECTIVE: We measured cortical gamma-oscillations in response to visual-language tasks consisting of picture naming and word reading in an effort to better understand human visual-language pathways. METHODS: We studied six patients with focal epilepsy who underwent extraoperative electrocorticography (ECoG) recording. Patients were asked to overtly name images presented sequentially in the picture naming task and to overtly read written words in the reading task. RESULTS: Both tasks commonly elicited gamma-augmentation (maximally at 80-100 Hz) on ECoG in the occipital, inferior-occipital-temporal and inferior-Rolandic areas, bilaterally. Picture naming, compared to reading task, elicited greater gamma-augmentation in portions of pre-motor areas as well as occipital and inferior-occipital-temporal areas, bilaterally. In contrast, word reading elicited greater gamma-augmentation in portions of bilateral occipital, left occipital-temporal and left superior-posterior-parietal areas. Gamma-attenuation was elicited by both tasks in portions of posterior cingulate and ventral premotor-prefrontal areas bilaterally. The number of letters in a presented word was positively correlated to the degree of gamma-augmentation in the medial occipital areas. CONCLUSIONS: Gamma-augmentation measured on ECoG identified cortical areas commonly and differentially involved in picture naming and reading tasks. Longer words may activate the primary visual cortex for the more peripheral field. SIGNIFICANCE: The present study increases our understanding of the visual-language pathways.},
	keywords = {Adult; Adolescent; Female; Male; Humans; Child; Reaction Time/physiology; Brain Mapping/methods; Epilepsy/*physiopathology; Electroencephalography/methods; Visual Cortex/*physiology; Visual Pathways/*physiology; Photic Stimulation/*methods; Brain Waves/*physiology; *Reading},
	year = {2011},
	eissn = {1872-8952},
	pages = {1929-1942}
}

@article{MTMT:1661000,
	title = {SYNCHRONIZATION OF NEURONAL-ACTIVITY IN HIPPOCAMPUS BY INDIVIDUAL GABAERGIC INTERNEURONS},
	url = {https://m2.mtmt.hu/api/publication/1661000},
	author = {COBB, SR and BUHL, EH and Halasy, Katalin and PAULSEN, O and Somogyi, Péter Pál},
	doi = {10.1038/378075a0},
	journal-iso = {NATURE},
	journal = {NATURE},
	volume = {378},
	unique-id = {1661000},
	issn = {0028-0836},
	abstract = {SYNCHRONIZATION Of neuronal activity is fundamental in the operation of cortical networks(1). With respect to an ongoing synchronized oscillation, the precise timing of action potentials is an attractive candidate mechanism for information coding(2-5) Networks of inhibitory interneurons have been proposed to have a role in entraining cortical, synchronized 40-Hz activity(6,7). Here we demonstrate that individual GABAergic interneurons(8) can effectively phase spontaneous firing and subthreshold oscillations in hippocampal pyramidal cells at theta frequencies (4-7 Hz). The efficiency of this entrainment is due to interaction of GABA(A)-receptor-mediated hyperpolarizing synaptic events with intrinsic oscillatory mechanisms tuned to this frequency range in pyramidal cells. Moreover, this GABAergic mechanism is sufficient to synchronize the firing of pyramidal cells. Thus, owing to the divergence of each GABAergic interneuron(9,10), more than a thousand pyramidal cells may share a common temporal reference established by an individual interneuron.},
	year = {1995},
	eissn = {1476-4687},
	pages = {75-78}
}