Results 221 to 230 of about 452,151 (266)
Some of the next articles are maybe not open access.
Spectral control of cortical activity
2017 American Control Conference (ACC), 2017The proposed problem is motivated by recent studies that show that loss of consciousness is associated with the spectral evolution of the (linearized) function that models cortical activity capture by electroencephalography. In this paper, we conduct a similar study for epileptic seizure-onset where features of interest are also captured by the ...
Sérgio Pequito +4 more
openaire +1 more source
Cortical activity pattern computation
Biosystems, 2007Neural computations are modelled in various ways, but still there is no clear understanding of how the brain performs its computational tasks. This paper presents new results about analysis of neural processes in terms of activity pattern computations.
Péter András 0001, Thomas Wennekers
openaire +3 more sources
Visual activity and cortical rewiring: activity-dependent plasticity of cortical networks
2006The mammalian cortex is organized anatomically into discrete areas, which receive, process, and transmit neural signals along functional pathways. These pathways form a system of complex networks that wire up through development and refine their connections into adulthood.
Sam H, Horng, Mriganka, Sur
openaire +2 more sources
Cortical activation in confrontation naming
NeuroReport, 1996Functional magnetic resonance imaging was used to detect cortical activation in the right and left perisylvian cortex of seven young adult right-handed volunteers in response to a letter fluency task and to a visual naming task using standardized line drawings.
C D, Smith +5 more
openaire +2 more sources
Nicotine, Smoking and Cortical Activation
Nature, 1968EVIDENCE has recently been presented which suggests that acetylcholine (ACh) is an inhibitory synaptic transmitter in the feline cerebral cortex1,2. Nicotine and tobacco smoke, in addition to ACh, have now been shown to depress cortical neurones3, and as a result of this finding Phillis and York have suggested that “the actions of nicotine on humans ...
A K, Armitage, G H, Hall
openaire +2 more sources
Cortical activation studies in aphasia
Current Neurology and Neuroscience Reports, 2002Positron emission tomography and functional magnetic resonance imaging are the major techniques of functional brain imaging. Both techniques have been used successfully in studies of the speech-relevant cortex in normal individuals and in aphasic patients with brain lesions.
Jutta, Kuest, Hans, Karbe
openaire +2 more sources
The effects of curare on cortical activity
Electroencephalography and Clinical Neurophysiology, 1961Abstract 1. (1) Intravenous curare produced variable degrees of depression of the direct cortical response. From these experiments it was observed that brain shrinkage and/or blood pressure changes secondary to the intravenous injection of curare can not explain the lack of reproducible results. Since uncontrolled variables appear to be operating,
N, MORLOCK, A A, WARD
openaire +2 more sources
Cortical Activity and the Explanatory Gap
Consciousness and Cognition, 1998An exploration is given of neural network features now being uncovered in cortical processing which begins to go a little way to help bridge the "Explanatory Gap" between phenomenal consciousness and correlated brain activity. A survey of properties suggested as being possessed by phenomenal consciousness leads to a set of criteria to be required of ...
openaire +2 more sources
The relationship of cortical activation to alternating autonomic activity
Electroencephalography and Clinical Neurophysiology, 1993It has been proposed that it is possible to selectively activate the cerebral hemispheres, thereby enhancing lateralized cognitive abilities. A proposed method of achieving selective activation is by altering nasal congestion/decongestion (nasal cycle), which is believed to effect a contralateral change in hemispheric activation through the autonomic ...
D, Velikonja, D S, Weiss, W C, Corning
openaire +2 more sources
Synfire Chains and Cortical Songs: Temporal Modules of Cortical Activity
Science, 2004How can neural activity propagate through cortical networks built with weak, stochastic synapses? We find precise repetitions of spontaneous patterns of synaptic inputs in neocortical neurons in vivo and in vitro. These patterns repeat after minutes, maintaining millisecond accuracy.
Yuji, Ikegaya +6 more
openaire +2 more sources