Chaos in the Brain. - Brain Dynamics Laboratory
... Nonlinear dynamics and Chaos Systems behaving in this manner are now called “chaotic.” They are essentially nonlinear, indicating that initial errors in measurements do not remain constant, rather they grow and decay nonlinearly (usually exponentially) with time. Since prediction becomes impossible ...
... Nonlinear dynamics and Chaos Systems behaving in this manner are now called “chaotic.” They are essentially nonlinear, indicating that initial errors in measurements do not remain constant, rather they grow and decay nonlinearly (usually exponentially) with time. Since prediction becomes impossible ...
Neuronal basis of contrast discrimination
... visual pattern perception have paralleled research on the neurophysiological response properties of neurons in the visual cortex. The prevailing view has been that psychophysical judgements about pattern discrimination and pattern appearance are limited by neuronal signals in early visual cortical a ...
... visual pattern perception have paralleled research on the neurophysiological response properties of neurons in the visual cortex. The prevailing view has been that psychophysical judgements about pattern discrimination and pattern appearance are limited by neuronal signals in early visual cortical a ...
Current BCI Platforms
... · BCI changes signals from mere reflections of CNS activity (EEG rhythms, neuronal firing rate)into the intended products of that activity · Two BCI Systems Input BCI(perception) Output BCI ...
... · BCI changes signals from mere reflections of CNS activity (EEG rhythms, neuronal firing rate)into the intended products of that activity · Two BCI Systems Input BCI(perception) Output BCI ...
Foundation and practice of neurofeedback for the treatment of epilepsy
... CLINICAL FINDINGS WITH EPILEPSY Since the first single-case study, reported over 30 years ago (Sterman & Friar, 1972), a fair number of controlled clinical studies, stemming from many different laboratories, have produced consistent data on the efficacy of SMR training in epileptic patients. It is p ...
... CLINICAL FINDINGS WITH EPILEPSY Since the first single-case study, reported over 30 years ago (Sterman & Friar, 1972), a fair number of controlled clinical studies, stemming from many different laboratories, have produced consistent data on the efficacy of SMR training in epileptic patients. It is p ...
Electroencephalography - Department of Computational and
... fMRI have time resolution between seconds and minutes. EEG measures the brain's electrical activity directly, while other methods record changes in blood flow (e.g., SPECT, fMRI) or metabolic activity (e.g., PET), which are indirect markers of brain electrical activity. EEG can be used simultaneousl ...
... fMRI have time resolution between seconds and minutes. EEG measures the brain's electrical activity directly, while other methods record changes in blood flow (e.g., SPECT, fMRI) or metabolic activity (e.g., PET), which are indirect markers of brain electrical activity. EEG can be used simultaneousl ...
Methods of Studying The Nervous System
... • Standard X-rays can’t be used for studying the brain because the brain is composed of many overlapping structures that all absorb X-rays to about the same degree • Contrast X-rays solve this problem in some cases; a radio-opaque material is introduced into the structure of interest to make it “sta ...
... • Standard X-rays can’t be used for studying the brain because the brain is composed of many overlapping structures that all absorb X-rays to about the same degree • Contrast X-rays solve this problem in some cases; a radio-opaque material is introduced into the structure of interest to make it “sta ...
Here is a link
... amplifying recording device. In the case of a time constant of 1 second or less, the extracellular field potentials correspond with that which is commonly known as the EEG. If the recording is carried out with an infinite time constant, that is, with direct current (DC) amplifier, then slower potent ...
... amplifying recording device. In the case of a time constant of 1 second or less, the extracellular field potentials correspond with that which is commonly known as the EEG. If the recording is carried out with an infinite time constant, that is, with direct current (DC) amplifier, then slower potent ...
Neurofeedback Treatment of Epilepsy
... patients, with an A-B-A design).8 Sterman reported that he trained at CZ because that was where the 12-15 Hz activity was best seen. Sterman reviewed all of the literature up to 2000, and found that every single study of neurofeedback for epilepsy reported positive results.1 In his meta-analysis, 8 ...
... patients, with an A-B-A design).8 Sterman reported that he trained at CZ because that was where the 12-15 Hz activity was best seen. Sterman reviewed all of the literature up to 2000, and found that every single study of neurofeedback for epilepsy reported positive results.1 In his meta-analysis, 8 ...
annual report 2004 - OV Lounasmaa Laboratory
... our new premises, finally started in November about one year behind the original schedule. The LTL will move into the new premises, recently renamed as Nanotalo, in April 2007. The new performance-based salary system, UPJ, will phase out the old age-based system in 2006. The first steps towards the ...
... our new premises, finally started in November about one year behind the original schedule. The LTL will move into the new premises, recently renamed as Nanotalo, in April 2007. The new performance-based salary system, UPJ, will phase out the old age-based system in 2006. The first steps towards the ...
Neuronal activity in human primary visual cortex correlates with
... © 2000 Nature America Inc. • http://neurosci.nature.com ...
... © 2000 Nature America Inc. • http://neurosci.nature.com ...
Methods of Studying The Nervous System - U
... (1) nothing must be injected into the subject (2) one image provides structural and functional information (3) the spatial resolution is better (4) changes can be measured in real time (although, the temporal resolution is poor compared to ERP) Pinel's Biopsychology, 5th Ed. ...
... (1) nothing must be injected into the subject (2) one image provides structural and functional information (3) the spatial resolution is better (4) changes can be measured in real time (although, the temporal resolution is poor compared to ERP) Pinel's Biopsychology, 5th Ed. ...
BRAIN DYNAMICS AT MULTIPLE SCALES: CAN ONE RECONCILE
... Dynamics in Brain Activity The above results are consistent with the idea that awake brain activity may be associated with high-dimensional dynamics, perhaps analogous to a stochastic system. To further investigate this aspect, we have examined data from animal experiments in which both microscopic ...
... Dynamics in Brain Activity The above results are consistent with the idea that awake brain activity may be associated with high-dimensional dynamics, perhaps analogous to a stochastic system. To further investigate this aspect, we have examined data from animal experiments in which both microscopic ...
Document
... To determine the MT, the coil is placed over the motor cortex and moved until the smallest possible impulse produces either a small motor evoked potential (MEP; usually 50 microvolts; Rossini et al, 1994) or a visible movement of the thumb, wrist or fingers (Pridmore et al, 1998) in at least half of ...
... To determine the MT, the coil is placed over the motor cortex and moved until the smallest possible impulse produces either a small motor evoked potential (MEP; usually 50 microvolts; Rossini et al, 1994) or a visible movement of the thumb, wrist or fingers (Pridmore et al, 1998) in at least half of ...
brain computer interaction elg5121 (multimedia communication)
... MRI is a technique used in radiology to visualize detailed internal structures Functional MRI or fMRI is a type of MRI scan that measures the hemodynamic response (change in blood flow) related to neural activity in the brain or spinal cord ...
... MRI is a technique used in radiology to visualize detailed internal structures Functional MRI or fMRI is a type of MRI scan that measures the hemodynamic response (change in blood flow) related to neural activity in the brain or spinal cord ...
The influence of current direction on phosphene
... phenes than currents flowing in the opposite direction. The same directional preference was reported by Amassian et al. (1994) for the visual extinction effect. An induced current passing the occipital pole from left to right disturbed the perception of visual stimuli in the right visual hemifield a ...
... phenes than currents flowing in the opposite direction. The same directional preference was reported by Amassian et al. (1994) for the visual extinction effect. An induced current passing the occipital pole from left to right disturbed the perception of visual stimuli in the right visual hemifield a ...
A simultaneous ERP/fMRI investigation of the P300 aging effect
... components that is apparent across a range of different tasks (Fabiani et al., 1998; Friedman, 2003; Richardson et al., 2011; West et al., 2010). This increasingly frontal orientation appears to mirror 1 of the most consistently observed phenomena in neuroimaging investigations of aging; the greater ...
... components that is apparent across a range of different tasks (Fabiani et al., 1998; Friedman, 2003; Richardson et al., 2011; West et al., 2010). This increasingly frontal orientation appears to mirror 1 of the most consistently observed phenomena in neuroimaging investigations of aging; the greater ...
KISHORE Aswathy - School of Computing
... human brain. However, in the human brain, this leads to another problem as discussed below. When multiple objects of different types are present in the visual scene, the situation changes from that discussed above. If for example, we have a ‘red circle’ and a ‘blue square’ in a visual scene, neurons ...
... human brain. However, in the human brain, this leads to another problem as discussed below. When multiple objects of different types are present in the visual scene, the situation changes from that discussed above. If for example, we have a ‘red circle’ and a ‘blue square’ in a visual scene, neurons ...
Relationship between muscle output and functional MRI
... outside of the MRI room. These included the pressure transducer (part of the transducer is made of stainless steel), EMG and force amplifiers, the associated power supply, and the data acquisition unit (laptop computer and its docking station). The electrode wires were formed into a flat cable runni ...
... outside of the MRI room. These included the pressure transducer (part of the transducer is made of stainless steel), EMG and force amplifiers, the associated power supply, and the data acquisition unit (laptop computer and its docking station). The electrode wires were formed into a flat cable runni ...
The Anterior Midline Field: Coercion or decision making? Brain and
... which has been shown to engender processing costs in self-paced reading (e.g., McElree, Traxler, Pickering, Seely, & Jackendoff, 2001), eye-tracking (e.g., Traxler, McElree, Williams, & Pickering (2005), and speed–accuracy tradeoff measures (McElree, Pylkkänen, Pickering, & Traxler, 2006). Important ...
... which has been shown to engender processing costs in self-paced reading (e.g., McElree, Traxler, Pickering, Seely, & Jackendoff, 2001), eye-tracking (e.g., Traxler, McElree, Williams, & Pickering (2005), and speed–accuracy tradeoff measures (McElree, Pylkkänen, Pickering, & Traxler, 2006). Important ...
Reduced BOLD response to periodic visual stimulation
... between 4 and 8 Hz to a drifting sine-wave grating. Human EEG recordings in response to flicker stimuli (Herrmann, 2001) show increased power in the steady-state potentials for driving frequencies between 6 and 20 Hz, with a weaker peak around 40 Hz. Differences in neuronal metabolic rate can be mea ...
... between 4 and 8 Hz to a drifting sine-wave grating. Human EEG recordings in response to flicker stimuli (Herrmann, 2001) show increased power in the steady-state potentials for driving frequencies between 6 and 20 Hz, with a weaker peak around 40 Hz. Differences in neuronal metabolic rate can be mea ...
Electroencephalogram based Brain
... Brain-Computer Interface (BCI) is a revolutionary new area using EEG that is most useful for the severely disabled individuals for hands-off device control and communication as they create a direct interface from the brain to the external environment, therefore circumventing the use of peripheral mu ...
... Brain-Computer Interface (BCI) is a revolutionary new area using EEG that is most useful for the severely disabled individuals for hands-off device control and communication as they create a direct interface from the brain to the external environment, therefore circumventing the use of peripheral mu ...
Visual areas and spatial summation in human visual cortex
... areas (V1, V2 and V3) with experiments that last only 30 min. Methods for identifying functional areas in the dorsal and ventral aspect of the human occipital cortex, however, have not achieved this level of precision; in fact, different laboratories have produced inconsistent reports concerning the ...
... areas (V1, V2 and V3) with experiments that last only 30 min. Methods for identifying functional areas in the dorsal and ventral aspect of the human occipital cortex, however, have not achieved this level of precision; in fact, different laboratories have produced inconsistent reports concerning the ...
What insights can fMRI offer into the structure and function of mid-tier visual areas?
... In defense of the term “neural activity” stands the fact that its common interpretation is “average firing rate in the local population,” and this kind of measurement does have inherent value. Other techniques for measuring in vivo neuronal responses tend to biased toward large neurons: electroencep ...
... In defense of the term “neural activity” stands the fact that its common interpretation is “average firing rate in the local population,” and this kind of measurement does have inherent value. Other techniques for measuring in vivo neuronal responses tend to biased toward large neurons: electroencep ...
Magnetoencephalography
Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers. Arrays of SQUIDs (superconducting quantum interference devices) are currently the most common magnetometer, while the SERF (spin exchange relaxation-free) magnetometer is being investigated for future machines. Applications of MEG include basic research into perceptual and cognitive brain processes, localizing regions affected by pathology before surgical removal, determining the function of various parts of the brain, and neurofeedback. This can be applied in a clinical setting to find locations of abnormalities as well as in an experimental setting to simply measure brain activity