Trichur Vidyasagar

Dynamic coupling of oscillatory neural activity and its roles in visual attention

Moein Esghaei, Stefan Treue, Trichur R Vidyasagar

Journal article  |  2022  |  TRENDS IN NEUROSCIENCES

Oscillatory neural activity is believed to have a central role in information processing in the mammalian brain. While early studi..

Mechanism underpinning the sharpening of orientation and spatial frequency selectivities in the tree shrew (Tupaia belangeri) primary visual cortex

Yamni S Mohan, Sivaram Viswanathan, Jaikishan Jayakumar, Errol KJ Lloyd, Trichur R Vidyasagar

Journal article  |  2022  |  BRAIN STRUCTURE & FUNCTION

Most neurons in the primary visual cortex (V1) of mammals show sharp orientation selectivity and band-pass spatial frequency tunin..

Dynamics of coherent activity between cortical areas defines a two-stage process of top-down attention

E Levichkina, M Kermani, YB Saalmann, TR Vidyasagar

Journal article  |  2021  |  EXPERIMENTAL BRAIN RESEARCH

Analysing a visual scene requires the brain to briefly keep in memory potentially relevant items of that scene and then direct att..

Visual search efficiency and functional visual cortical size in children with and without dyslexia

Bao N Nguyen, Scott C Kolbe, Ashika Verghese, Christine Nearchou, Allison M McKendrick, Gary F Egan, Trichur R Vidyasagar

Journal article  |  2021  |  Neuropsychologia

Dyslexia is characterised by poor reading ability. Its aetiology is probably multifactorial, with abnormal visual processing playi..

The effect of aging on the eccentricity dependency of orientation anisotropy of perceptual surround suppression

Menaka S Malavita, Trichur R Vidyasagar, Allison M McKendrick

Journal article  |  2021  |  JOURNAL OF VISION

The features of perceptual surround suppression vary with eccentricity, such that the suppression strength is increased for horizo..

A Temporal Sampling Basis for Visual Processing in Developmental Dyslexia

Kim Archer, Kristen Pammer, Trichur Raman Vidyasagar

Journal article  |  2020  |  FRONTIERS IN HUMAN NEUROSCIENCE

Knowledge of oscillatory entrainment and its fundamental role in cognitive and behavioral processing has increasingly been applied..

Diversity of Feature Selectivity in Macaque Visual Cortex Arising from a Limited Number of Broadly Tuned Input Channels

Yamni S Mohan, Jaikishan Jayakumar, Errol KJ Lloyd, Ekaterina Levichkina, Trichur R Vidyasagar

Journal article  |  2019  |  CEREBRAL CORTEX

Spike (action potential) responses of most primary visual cortical cells in the macaque are sharply tuned for the orientation of a..

The Effect of Aging on the Eccentricity Dependency of Orientation Anisotropy of Perceptual Surround Suppression of Contrast Detection

Menaka S Malavita, Trichur R Vidyasagar, Allison M McKendrick

Conference Proceedings  |  2019  |  PERCEPTION

Visual attention and neural oscillations in reading and dyslexia: Are they possible targets for remediation?

Trichur R Vidyasagar

Journal article  |  2019  |  NEUROPSYCHOLOGIA

After decades of finding a range of cognitive functions both in visual and phonological domains that correlate with reading perfor..

An Integrated Neuronal Model of Claustral Function in Timing the Synchrony Between Cortical Areas

Trichur R Vidyasagar, Ekaterina Levichkina

Journal article  |  2019  |  FRONTIERS IN NEURAL CIRCUITS

It has been suggested that the function of the claustrum (CL) may be to orchestrate and integrate the activity of the different co..