@article{MTMT:1252669,
	title = {Transient cortical excitation at the onset of visual fixation},
	url = {https://m2.mtmt.hu/api/publication/1252669},
	author = {Rajkai, Csaba and Lakatos, Péter and Chen, CM and Pincze, Zsuzsa and Karmos, György and Schroeder, CE},
	doi = {10.1093/cercor/bhm046},
	journal-iso = {CEREB CORTEX},
	journal = {CEREBRAL CORTEX},
	volume = {18},
	unique-id = {1252669},
	issn = {1047-3211},
	abstract = {Primates actively examine the visual world by rapidly shifting gaze
		(fixation) over the elements in a scene. Despite this fact, we
		typically study vision by presenting stimuli with gaze held constant.
		To better understand the dynamics of natural vision, we examined how
		the onset of visual fixation affects ongoing neuronal activity in the
		absence of visual stimulation. We used multiunit activity and current
		source density measurements to index neuronal firing patterns and
		underlying synaptic processes in macaque V1. Initial averaging of
		neural activity synchronized to the onset of fixation suggested that a
		brief period of cortical excitation follows each fixation. Subsequent
		single-trial analyses revealed that 1) neuronal oscillation phase
		transits from random to a highly organized state just after the
		fixation onset, 2) this phase concentration is accompanied by increased
		spectral power in several frequency bands, and 3) visual response
		amplitude is enhanced at the specific oscillatory phase associated with
		fixation. We hypothesize that nonvisual inputs are used by the brain to
		increase cortical excitability at fixation onset, thus "priming" the
		system for new visual inputs generated at fixation. Despite remaining
		mechanistic questions, it appears that analysis of fixation-related
		responses may be useful in studying natural vision.},
	year = {2008},
	eissn = {1460-2199},
	pages = {200-209}
}

@article{MTMT:1252674,
	title = {Intracortical generation and behavioral modulation of auditory cortical gamma activity and steady-state response in the cat},
	url = {https://m2.mtmt.hu/api/publication/1252674},
	author = {Karmos, György and Lakatos, Péter and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István},
	doi = {10.1016/j.ijpsycho.2004.05.006},
	journal-iso = {INT J PSYCHOPHYSIOL},
	journal = {INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY},
	volume = {54},
	unique-id = {1252674},
	issn = {0167-8760},
	year = {2004},
	eissn = {1872-7697},
	pages = {74-75},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1121145,
	title = {Attention and arousal related modulation of spontaneous gamma-activity in the auditory cortex of the cat.},
	url = {https://m2.mtmt.hu/api/publication/1121145},
	author = {Lakatos, Péter and Szilagyi, N and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István and Karmos, György},
	doi = {10.1016/j.cogbrainres.2003.10.023},
	journal-iso = {COGNITIVE BRAIN RES},
	journal = {COGNITIVE BRAIN RESEARCH},
	volume = {19},
	unique-id = {1121145},
	issn = {0926-6410},
	abstract = {Sensory information processing in neocortex is associated with 
		rhythmic
		synchronized gamma frequency firing of sensory cortical units 
		and similar
		frequency oscillations of the field potentials. Different 
		aspects of the gamma
		activity (20-80 Hz) have been suggested as correlates of 
		attention, arousal and
		sensory binding. It is clear that attention has a modality 
		selective influence,
		while arousal has a more general effect on the sensory systems. 
		We used an
		experimental conditioning paradigm to separate these 
		differential effects of
		attention and arousal on spontaneous neocortical gamma activity. 
		We recorded
		field potentials with epidural electrodes placed above the 
		auditory cortical
		areas of cats. The animals performed a simple instrumental 
		alimentary
		conditioning task with different modality (visual and auditory) 
		conditioned
		stimuli. When they attended to the auditory conditioned 
		stimulus, both frequency 
		and power increase of spontaneous gamma activity were detected. 
		However when they
		attended visual, we found no power increase of gamma activity 
		recorded above
		auditory areas, while the frequency increase was the same as in 
		the "attend
		auditory" condition. We conclude that the power modulation of 
		gamma activity is
		modality specific and thus can be attributed to selective 
		attention, whereas the 
		frequency modulation of gamma activity shows no modality 
		specificity, it is
		influenced by the arousal level.},
	year = {2004},
	pages = {1-9},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1252679,
	title = {Behavioral modulation of the auditory steady state response in the cat},
	url = {https://m2.mtmt.hu/api/publication/1252679},
	author = {Karmos, György and Lakatos, Péter and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István},
	journal-iso = {J COGNITIVE NEUROSCI},
	journal = {JOURNAL OF COGNITIVE NEUROSCIENCE},
	volume = {Suppl. 1},
	unique-id = {1252679},
	issn = {0898-929X},
	year = {2002},
	eissn = {1530-8898},
	pages = {70-70},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1252678,
	title = {Modulation of gamma-activity in the background of an instrumental conditioning paradigm in cats},
	url = {https://m2.mtmt.hu/api/publication/1252678},
	author = {Lakatos, Péter and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István and Karmos, György},
	journal-iso = {J COGNITIVE NEUROSCI},
	journal = {JOURNAL OF COGNITIVE NEUROSCIENCE},
	volume = {Suppl. 1.},
	unique-id = {1252678},
	issn = {0898-929X},
	year = {2002},
	eissn = {1530-8898},
	pages = {70-70},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1252677,
	title = {Effect of reversible blocade of the medial geniculate body on the auditory cortical ERP in cat},
	url = {https://m2.mtmt.hu/api/publication/1252677},
	author = {Rajkai, Csaba and Karmos, György and Lakatos, Péter and Pincze, Zsuzsa and Ulbert, István and Javitt, DC},
	journal-iso = {J COGNITIVE NEUROSCI},
	journal = {JOURNAL OF COGNITIVE NEUROSCIENCE},
	volume = {Suppl. 1.},
	unique-id = {1252677},
	issn = {0898-929X},
	year = {2002},
	eissn = {1530-8898},
	pages = {40-40},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1121143,
	title = {Frequency of gamma activity is modulated by motivation in the auditory cortex of cat.},
	url = {https://m2.mtmt.hu/api/publication/1121143},
	author = {Karmos, György and Lakatos, Péter and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István},
	doi = {10.1556/ABiol.53.2002.4.8},
	journal-iso = {ACTA BIOL HUNG},
	journal = {ACTA BIOLOGICA HUNGARICA (1983-2018)},
	volume = {53},
	unique-id = {1121143},
	issn = {0236-5383},
	abstract = {Repetitive acoustic stimuli elicit steady-state response (SSR) 
		in the gamma-band 
		both in humans and in mammals. Our aim was to investigate 
		changes of the
		spontaneous gamma activity and the SSR in the auditory cortex of 
		cats in the
		background of an instrumental conditioning situation. Epidural 
		electrodes were
		chronically implanted above the auditory neocortex. The 
		presentation rate of the 
		clicks varied between 20 and 65/s. Spontaneous EEG and SSR were 
		collected in
		three behavioral states: in an indifferent environment, in the 
		instrumental cage 
		while the cat was waiting for the light CS, and when she stepped 
		on the pedal and
		was waiting for the meat reward. Using different repetition rate 
		clicks we
		determined which stimulus rate elicited the largest SSR in these 
		three
		situations. In quiet animal the highest SSR appeared at 28-30/s. 
		Before and
		during the CS the optimal stimulus rate shifted to 32-38/s. The 
		frequency of the 
		spontaneous gamma activity changed in parallel way depending on 
		the situation. We
		conclude that both the SSR and the spontaneous gamma activity 
		reflect resonant
		activity of the same neuronal circuit of the auditory cortex, 
		and it is modulated
		by the motivational state of the animal.},
	year = {2002},
	eissn = {1588-256X},
	pages = {473-483},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1121142,
	title = {Effect of deviant probability and interstimulus/interdeviant interval on the auditory N1 and mismatch negativity in the cat auditory cortex.},
	url = {https://m2.mtmt.hu/api/publication/1121142},
	author = {Pincze, Zsuzsa and Lakatos, Péter and Rajkai, Csaba and Ulbert, István and Karmos, György},
	doi = {10.1016/S0926-6410(01)00105-7},
	journal-iso = {COGNITIVE BRAIN RES},
	journal = {COGNITIVE BRAIN RESEARCH},
	volume = {13},
	unique-id = {1121142},
	issn = {0926-6410},
	abstract = {In passive oddball paradigm the effects of changes in 
		interstimulus/interdeviant 
		interval (ISI; IDI) and deviant probability were investigated on 
		mismatch
		negativity (MMN), auditory N1 wave and the exogenous P1 
		component of the auditory
		event-related potential in the cat. An epidural electrode matrix 
		was chronically 
		implanted over the auditory fields of the neocortex, and the 
		amplitudes of the
		aforementioned components were measured in the location of their 
		amplitude
		maxima. Dependence of the MMN both on the ISI and IDI as well as 
		deviant
		probability was revealed, while the amplitude of the P1 and N1 
		showed dependence 
		merely on the ISI. This method can be used for separation of the 
		two negative,
		often overlapping components in the cat.},
	year = {2002},
	pages = {249-253},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1252680,
	title = {Interaction of auditory ERP and steady-state response in cat:intracortical study},
	url = {https://m2.mtmt.hu/api/publication/1252680},
	author = {Karmos, György and Lakatos, Péter and Pincze, Zsuzsa and Rajkai, Csaba and Ulbert, István},
	doi = {10.1016/S0167-8760(01)00145-3},
	journal-iso = {INT J PSYCHOPHYSIOL},
	journal = {INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY},
	volume = {41},
	unique-id = {1252680},
	issn = {0167-8760},
	year = {2001},
	eissn = {1872-7697},
	pages = {233-233},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}

@article{MTMT:1121141,
	title = {Separation of mismatch negativity and the N1 wave in the auditory cortex of the cat: a topographic study.},
	url = {https://m2.mtmt.hu/api/publication/1121141},
	author = {Pincze, Zsuzsa and Lakatos, Péter and Rajkai, Csaba and Ulbert, István and Karmos, György},
	doi = {10.1016/S1388-2457(01)00509-0},
	journal-iso = {CLIN NEUROPHYSIOL},
	journal = {CLINICAL NEUROPHYSIOLOGY},
	volume = {112},
	unique-id = {1121141},
	issn = {1388-2457},
	abstract = {OBJECTIVE: The amplitude distribution of the frequency mismatch 
		negativity (MMN) 
		and that of P1 and N1 components were investigated in cats to 
		reveal their
		sources in the auditory areas of the neocortex. METHODS: Pure 
		tone stimuli were
		given in a passive oddball paradigm with different degrees of 
		deviance between
		the standard and deviant tones. Amplitude maps of event-related 
		potential (ERP)
		components were generated from the responses, recorded in awake, 
		freely moving
		animals by a chronically implanted epidural electrode matrix, 
		covering both the
		primary and secondary auditory fields. RESULTS: The P1 and N1 
		components appeared
		with highest amplitude on the middle ectosylvian gyrus, while 
		the amplitude
		maximum of the MMN was ventral and rostral to them on the AII 
		area. Both the
		latency and the peak amplitude of the MMN depended on the degree 
		of deviance.
		CONCLUSIONS: The MMN is generated in the rostroventral part of 
		the secondary
		auditory area, well separated from the sources of the P1 and N1 
		components.},
	year = {2001},
	eissn = {1872-8952},
	pages = {778-784},
	orcid-numbers = {Ulbert, István/0000-0001-9941-9159}
}