Wyniki wyszukiwania

1

Intra-individual reaction time variability and response preparation: an EEG study

100%

Dankinas D., Parciauskaite V., Dapsys K.

Acta Neurobiologiae Experimentalis

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2015

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tom 75

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nr 4

To behave more efficiently the human brain must anticipate future events with different probabilities and prepare appropriate responses. Previous studies demonstrated that participants react faster to more probable stimuli. It has been shown that this effect in reaction time reduction is related to the response preparation process. However it is still unknown what the minimum difference in stimulus probabilities is that is sufficient to elicit response preparation as measured with the EEG. Intra-individual reaction time variability indicates the stability of an individual’s response performance and provides useful information about cognitive functioning. It’s use has become prevalent in recent clinical studies. In order to extend understanding of cognitive and neural mechanisms of response stability we hypothesized that intra-individual reaction time variability relates to the response preparation process. Specifically, we hypothesized that response preparation to more probable stimuli would result in not only faster reaction time but also in a reduction of response variability. To verify this hypothesis, we tested 14 healthy subjects using reaction time and EEG as dependent measures. Two different stimuli with probabilities of 33.3% and 66.6% were assigned to two counterbalanced responses. The results of our study showed that stimulus probabilities of 66.6% and 33.3% were sufficient to elicit response preparation. Our data also revealed that response preparation to more probable stimuli speeds RT and reduces RT variability.

2

Time-frequency-space localization of epileptic EEG oscillations

100%

Matysiak A., Durka P. J., Montes E. M., Barwinski M., Zwolinski P., Roszkowski M., Blinowska K. J.

Acta Neurobiologiae Experimentalis

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2005

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tom 65

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nr 4

3

EEG afterdischarge patterns and performance of the avoidance response in hippocampally kindled cats

100%

Majkowski J., Sobieszek A., Dlawichowska E.

Acta Neurobiologiae Experimentalis

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1989

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tom 49

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nr 1

4

Unibiased high resolution method of EEG analysis in time-frequency space

100%

Blinowska K. J., Durka P. J.

Acta Neurobiologiae Experimentalis

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2001

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tom 61

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nr 3

5

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Daily pattern of EEG activity in rats with lateral hypothalamic lesions

100%

Jurkowlaniec E., Trojniar W., Tokarski J.

Journal of Physiology and Pharmacology

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1994

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tom 45

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nr 3

6

Investigation of coherence structure and EEG activity propagation during sleep

100%

Kaminski M., Blinowska K., Szelenberger W.

Acta Neurobiologiae Experimentalis

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1995

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tom 55

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nr 3

7

The influence of acute progressive hypoxia on bioelectrical activity of the brain

84%

Jernajczyk W., Sobanska A., Marczak M., Maciejewski A., Latka M., West B., Pokorski M.

Journal of Physiology and Pharmacology. Supplement

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2006

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tom 57

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nr 4

165-174

Hypoxia, a noxious and hyperventilatory stimulus and a modifier of neuronal metabolism, could influence cortical function. In this study we attempted to assess any such influence, its determinants, and particularly the role in it of the accompanying hypoxic emotional distress. We addressed the issue by examining the associations among EEG, ventilation, and anxiety during progressive poikilocapnic hypoxia (end-point SaO2 75%) in 12 awake healthy volunteers (mean age 27.5 ±0.7 yr). All subjects hyperventilated in response to hypoxia and 3 of them had a high level of anticipatory anxiety that forced one person to discontinue the test. We failed to show any major effect of hypoxia on the EEG pattern analyzed by visual inspection or wavelet power spectra. Therefore, no relationship between the ventilatory and cortical activity responses to hypoxia could be established. Cortical activity changes appeared, however, in the subjects who experienced emotional distress during the test. These changes were apparent on an expanded analysis of the EEG signal by the use of the Lempel-Ziv complexity that takes into account the ordering of variations in the signal, rather than only the relative frequency of events analyzed by the Shannon entropy. The Lempel-Ziv complexity offers promise as a novel method for unraveling fine and otherwise unexpressed alterations in cortical bioelectrical activity.

8

Electrophysiological correlates of attentional processes in patients with liver cirrhosis without minimal or clinically-overt hepatic encephalopathy

84%

Ciecko-Michalska I., Binder M., Wyczesany M., Szewczyk J., Senderecka M., Wojcik J., Dziedzic T., Slowik A., Mach T.

Journal of Physiology and Pharmacology

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2012

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tom 63

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nr 4

9

Brain-training for physical performance: a study of EEG-neurofeedback and alpha relaxation training in athletes

84%

Mikicin M., Orzechowski G., Jurewicz K., Paluch K., Kowalczyk M., Wrobel A.

Acta Neurobiologiae Experimentalis

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2015

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tom 75

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nr 4

In recent years, EEG-neurofeedback training (EEG-NFB) has been increasingly used to optimize various brain functions. Better performance in various activities was also reported after relaxation trainings, another popular method in therapeutic practice. Both these methods are used as a part of professional coaching in sports training centers. In the present study, we aimed to evaluate the impact of such holistic training on physiological (EEG) and behavioral measures on semi-professional athletes. EEG-NFB paradigm was intended for amplification of the amplitudes of SMR (12–15 Hz) and beta1 (13–20 Hz) bands and simultaneous reduction of the amplitude of theta (4–7.5 Hz) and beta2 (20–30 Hz). Participation in NFB sessions was accompanied with self-administration of relaxing, audio-visual stimulation after each daily athletic training session. The training program resulted in the increase of alpha and beta1 power of trained participants when assessed in rest with eyes-closed. In eyes – open state, participants of the trained group maintained the same level in all frequency bands, in opposite to the control subjects, whose power decreased in the second measurement in beta1 band when compared to the first one. The trained group exhibited greater reduction of reaction times in a test of visual attention than the control group and showed improvement in several performance measures of Kraepelin’s work-curve, used to evaluate speed, effectiveness and work accuracy. Together, these results present initial support for the use of holistic, neurophysiological training in sports workout.

10

Cognitive evoked response potentials in patients with liver cirrhosis without diagnosis of minimal or overt hepatic encephalopathy. A pilot study

84%

Ciecko-Michalska I., Wojcik J., Wyczesany M., Binder M., Szewczyk J., Senderecka M., Dziedzic T., Slowik A., Mach T.

Journal of Physiology and Pharmacology

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2012

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tom 63

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nr 3

11

Event-related desynchronization and synchronization in evoked K-complexes

84%

Zygierewicz J., Malinowska U., Suffczynski P., Piotrowski T., Durka P. J.

Acta Neurobiologiae Experimentalis

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2009

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tom 69

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nr 2

254-261

K-complexes - phenomena occurring in sleep EEG - pose severe challenges in terms of detection as well as finding their physiological origin. In this study, K-complexes (KCs) were evoked by auditory stimuli delivered during sleep. The use of evoked KCs enables testing the sleeping nervous system under good experimental control. This paradigm allowed us to adopt into the KC studies a method of signal analysis that provides time-frequency maps of statistically significant changes in signal energy density. Our results indicate that KCs and sleep spindles may be organized by a slow oscillation. Accordingly, KCs might be evoked only if the stimulus occurs in a certain phase of the slow oscillation. We also observed middle-latency evoked responses following auditory stimulation in the last sleep cycle. This effect was revealed only by the time-frequency maps and was not visible in standard averages.

12

The EEG activity after lesions of the diencephalic part of the zona incerta in rats

84%

Jurkowlaniec E., Trojniar W., Tokarski J.

Acta Physiologica Polonica

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1990

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tom 41

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nr 7

Jurkowlaniec E., Trojniar W. and Tokarski J.: The EEG activity after lesions of the diencephalic part of the zona incerta in rats, Acta Physiol. Pol. Neocortical and hippocampal EEG activity was recorded in 23 rats subjected to the bilateral electrolytic lesions of the diencephalic zona incerta (ZI). The aim was to find whether damage to ZI can replicate insomnia and disturbances in cortical EEG desynchronization and hippocampal theta rhythm found after lesions of the lateral hypothalamic (LH) area. No effect of the ZI lesions on waking-sleep cycle was found. The amplitude and frequency of cortical waves and hippocampal theta rhythm during waking were changed only in some rats. These changes were small, short-lasting and bidirectional (toward and increase or decrease in different subjects). Both the amplitude and frequency of paradoxical sleep theta were depressed in part of animals. Thus the marked EEG changes after LH lesions can not be attributed to simultaneous damage of the adjacent subthalamic region. However, the ZI seems to constitute a part of a larger system regulating cortical arousal and hippocampal theta rhythm.

13

Activation of tachykinin system in the pedunculopontine tegmental nucleus suppresses hippocampal theta rhythm in urethane-anesthetized rats

84%

Leszkowicz E., Trojniar W.

Acta Neurobiologiae Experimentalis

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2005

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tom 65

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nr 4

14

Molecular hydrogen affords neuroprotection in a translational piglet model of hypoxic-ischemic encephalopathy

84%

Nemeth J., Toth-Szuki V., Varga V., Kovacs V., Remzso G., Domoki F.

Journal of Physiology and Pharmacology

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2016

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tom 67

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nr 5

15

Gamma activity in the piriform cortex and behavioral thresholds for electrical stimulation in the olfactory bulb

84%

Jirsa R., Radil T.

Acta Neurobiologiae Experimentalis

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1997

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tom 57

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nr 1

16

Effect of lateral hypothalamic lesion on sleep-waking pattern and EEG power spectra in the rat

84%

Jurkowlaniec E., Pracki T., Trojniar W., Tokarski J.

Acta Neurobiologiae Experimentalis

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1996

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tom 56

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nr 1

17

20 Hz bursting beta activity in the cortico-thalamic system of visually attending cats

84%

Wrobel A., Bekisz M., Kublik E., Waleszczyk W. J.

Acta Neurobiologiae Experimentalis

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1994

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tom 54

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nr 2

18

EEG analysis with nonlinear deterministic and stochastic methods: a combined strategy

84%

Fell J., Kaplan A., Darkhovsky B., Roschke J.

Acta Neurobiologiae Experimentalis

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2000

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tom 60

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nr 1

We describe nonlinear deterministic versus stochastic methodology, their applications to EEG research and the neurophysiological background underlying both approaches. Nonlinear methods are based on the concept of attractors in phase space. This concept on the one hand incorporates the idea of an autonomous (stationary) system, on the other hand implicates the investigation of a long time evolution. It is an unresolved problem in nonlinear EEG research that nonlinear methods per se give no feedback about the stationarity aspect. Hence, we introduce a combined strategy utilizing both stochastic and nonlinear deterministic methods. We propose, in a first step to segment the EEG time series into piecewise quasi-stationary epochs by means of nonparametric change point analysis. Subsequently, nonlinear measures can be estimated with higher confidence for the segmented epochs fullfilling the stationarity condition.

19

Effect of unilateral ibotenate lesions of the ventral tegmental area on cortical and hippocampal EEG in freely behaving rats

84%

Jurkowlaniec E., Tokarski J., Trojniar W.

Acta Neurobiologiae Experimentalis

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2003

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tom 63

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nr 4

20

Electroencephalographic and respiratory activities during acute intermittent hypoxia in anesthetized rats

67%

Budzinska K., Ilasz R.

Journal of Physiology and Pharmacology. Supplement

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2007

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tom 58

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nr 5

Ograniczanie wyników

Intra-individual reaction time variability and response preparation: an EEG study

Time-frequency-space localization of epileptic EEG oscillations

EEG afterdischarge patterns and performance of the avoidance response in hippocampally kindled cats

Unibiased high resolution method of EEG analysis in time-frequency space

Daily pattern of EEG activity in rats with lateral hypothalamic lesions

Investigation of coherence structure and EEG activity propagation during sleep

The influence of acute progressive hypoxia on bioelectrical activity of the brain

Electrophysiological correlates of attentional processes in patients with liver cirrhosis without minimal or clinically-overt hepatic encephalopathy

Brain-training for physical performance: a study of EEG-neurofeedback and alpha relaxation training in athletes

Cognitive evoked response potentials in patients with liver cirrhosis without diagnosis of minimal or overt hepatic encephalopathy. A pilot study

Event-related desynchronization and synchronization in evoked K-complexes

The EEG activity after lesions of the diencephalic part of the zona incerta in rats

Activation of tachykinin system in the pedunculopontine tegmental nucleus suppresses hippocampal theta rhythm in urethane-anesthetized rats

Molecular hydrogen affords neuroprotection in a translational piglet model of hypoxic-ischemic encephalopathy

Gamma activity in the piriform cortex and behavioral thresholds for electrical stimulation in the olfactory bulb

Effect of lateral hypothalamic lesion on sleep-waking pattern and EEG power spectra in the rat

20 Hz bursting beta activity in the cortico-thalamic system of visually attending cats

EEG analysis with nonlinear deterministic and stochastic methods: a combined strategy

Effect of unilateral ibotenate lesions of the ventral tegmental area on cortical and hippocampal EEG in freely behaving rats

Electroencephalographic and respiratory activities during acute intermittent hypoxia in anesthetized rats