Results 251 to 260 of about 118,658 (298)

Motor cortical excitability in schizophrenia

Biological Psychiatry, 2002
Transcranial magnetic stimulation (TMS) provides a method to examine cortico-cortical motor excitability and hemispheric asymmetry in unmedicated and medicated schizophrenia patients.Fourteen right-handed schizophrenia patients (seven on conventional neuroleptics and seven medication-free) were compared with seven right-handed, age- and gender-matched ...
Alvaro, Pascual-Leone, Dara S, Manoach, Robert, Birnbaum, Donald C, Goff   +3 more
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Probing for cortical excitability

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
This paper introduces a new method for measuring cortical excitability using an electrical probing stimulus via intracranial electroencephalography (iEEG). Stimuli consisted of 100 single bi-phasic pulses, delivered every 10 minutes. Neural excitability is estimated by extracting a feature from the iEEG responses to the stimuli, which we dub the mean ...
Dean R, Freestone, Anthony N, Burkitt, Alan, Lai, Timothy S, Nelson, David B, Grayden, Simon, Vogrin, Michael, Murphy, Wendyl, D'Souza, Radwa, Badawy, Levin, Kuhlmann, Mark J, Cook   +10 more
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Choline Excites Cortical Neurons

Science, 1979
In cats under halothane or methoxyflurane, iontophoretic applications of choline are only eight times weaker than applications of acetylcholine in evoking firing of neurons in the sensorimotor region of the cerebral cortex. The action of choline is suppressed by atropine but not by two agents that block choline uptake (hemicholinium-3 and ...
K, Krnjević, W, Reinhardt
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Cortical Excitability, Perseveration, and Stuttering

Journal of Speech and Hearing Research, 1971
Twenty-three male stutterers were compared with 25 male nonstutterers on measures of speech behavior, perseveration, and neurologic function. Flicker fusion threshold was determined as the single measure of perseveration, and multiple oral readings of a 218-word passage were recorded.
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Abnormal cortical excitability in Rett syndrome

Pediatric Neurology, 1993
Visual and somatosensory evoked potentials (VEPs and SEPs) were studied in 9 patients with Rett syndrome and compared with those in 6 patients with photosensitive progressive myoclonus epilepsy (PPME). In Rett syndrome, a giant III-IV amplitude of VEPs was present in 8 patients, although none exhibited giant II-III amplitudes.
H, Yamanouchi, M, Kaga, M, Arima
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The rhythm of cortical excitability

Electroencephalography and Clinical Neurophysiology, 1980
Evidence has been gained which suggests that the spectral properties of the excitability cycle are other than those first proposed or assumed to exist in a number of experiments and theories. Instead of appearing as a sinusoidal cycle at the alpha frequency, the excitability cycle seems to be irregular and slower on the average than the EEG alpha ...
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Cortical excitability in Duchenne muscular dystrophy

Clinical Neurophysiology, 2008
To investigate the probable cortical excitability changes in DMD by electrophysiological means.Sixteen cases with DMD, 10 age-matched control children (CC) and 10 healthy adult volunteers (AC) were studied with a transcranial magnetic stimulation (TMS) test battery composed of central conduction time, cortical silent period and paired TMS paradigm ...
V, Yayla, A E, Oge, F, Deymeer, H, Gurvit, S, Akca-Kalem, Y, Parman, P, Oflazer   +6 more
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Abnormal cortical motor excitability in dystonia

Neurology, 1996
To assess the excitability of the motor system, we studied 11 patients with task-specific dystonia and 11 age-matched normal subjects. The dominant side was affected in nine of the patients. We delivered transcranial magnetic stimuli at different stimulus intensities and with different levels of muscle facilitation to the side contralateral to the side
K, Ikoma, A, Samii, B, Mercuri, E M, Wassermann, M, Hallett   +4 more
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Cortical excitation and chronic pain

Trends in Neurosciences, 2008
Investigation of the basic mechanisms of chronic pain not only provides insights into how the brain processes and modulates sensory information but also provides the basis for designing novel treatments for currently intractable clinical conditions.
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