Vahe Poghosyan
RIKEN Brain Science Institute
26 Papers
176 Citations
Vahe Poghosyan is an academic researcher from RIKEN Brain Science Institute. The author has contributed to research in topics: Magnetoencephalography & Visual cortex. The author has an hindex of 13, co-authored 22 publications.
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Papers
Real-time neural activity and connectivity in healthy individuals and schizophrenia patients
TL;DR: The single trial analysis demonstrated that the reduced activations identified from the average MEG signal of schizophrenic subjects is due to high variability across single trials rather than reduced activity in each single trial.
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MEG's ability to localise accurately weak transient neural sources.
TL;DR: MEG can detect and localise weak transient activations and the human HFO with an accuracy of a few mm at cortical and subcortical regions even when a small number of trials are used.
64
Early (N70m) Neuromagnetic Signal Topography and Striate and Extrastriate Generators Following Pattern Onset Quadrant Stimulation
TL;DR: The MEG signal generated by sinusoidal grating pattern onset at 1 and 3 cpd, presented randomly to the four quadrants, was analyzed in terms of gross signal properties and current dipole modeling and for a subset of subjects with magnetic field tomography (MFT).
62
Precise mapping of early visual responses in space and time
TL;DR: For the first time in humans, significantly shorter onset latencies in V1 for peripheral than parafoveal VF stimulations are shown.
56
MEG reveals a fast pathway from somatosensory cortex to occipital areas via posterior parietal cortex in a blind subject
Andreas A. Ioannides,Lichan Liu,Vahe Poghosyan,George A. Saridis,Albert Gjedde,Maurice Ptito,Maurice Ptito,Ron Kupers,Ron Kupers +8 more
TL;DR: In this paper, the authors used tomographic analysis of single trial magnetoencephalography (MEG) data recorded from one congenitally blind and two sighted subjects after stimulation of the left and right median nerves at three intensities: below sensory threshold, above sensory threshold and above motor threshold; the last sufficient to produce thumb twitching.