Neurophysiology @ NIMHANS
  • Home
  • About us
  • Infrastructure
  • Employees
    • Faculty >
      • Dr Bindu M Kutty
      • Dr TN Sathyaprabha
      • Dr BS Shankaranarayana Rao
      • Dr Laxmi T Rao
      • Dr Kaviraja Udupa
      • Dr Yoganarasimha Doreswamy
      • Dr K Vijayalakshmi
      • Dr. BN Srikumar
    • Scientific Staff
    • Technical Staff
    • Office Staff
    • Assisting Staff
    • Retired Employees >
      • Dr TR Raju
      • Dr. Sulekha S
  • Projects
    • Current Projects
    • Recent Projects
    • Past Projects
  • Publications
    • 1990-1999
    • 2000-2004
    • 2005-2007
    • 2008-2011
    • 2015-2016
    • 2016-2017
    • 2017-2018
    • 2019-2020
    • Books and Proceedings
  • Links
    • Contact us
    • Nostalgia
    • Awards
  • NPhyTimes
    • Calendar
  • Alumni
  • Scholars

The Brain Series - Episode 2

7/1/2013

0 Comments

 
We watched and discussed most part of Charlie Rose Brain Series - Episode 2: "The Perceiving Brain". One controversial aspect was that surgery for squint (strabismus) correction may not be of benefit after a critical period. However see this article for a differing opinion. Overall, an excellent introduction to visual perception.
0 Comments

Time course of Perceptual Judgement

16/10/2012

0 Comments

 
Dr. Shwetha Shankar (Wake Forest School of Medicine) presented her work on "Time course of a Perceptual Judgement and Factors affecting it" .

While, Reaction time (RT) studies have been in vogue for a long time, Donders was the first to try and get to extract processing time (time taken to identify the target) in the 1880s. The subtraction approach however has a number of limitations - there are multiple covert factors at play, high variability and speed-accuracy trade-offs that take place. Also visual stimuli tend to leave a after-image so the timing  is unpredictable.  To counter this people have tried using mask images but that introduces other confounds. 

Shwetha's group used a compelled-saccade task with a variable gap time between go and cue images to arrive at processing time (reaction time - gap time). They also created a Tachometric curve (with centre point, slope/rise time and maximum height) that graphed %correct responses as a function of processing time. This approach yields much more information than reaction time or psychometric curve (%correct vs gap time) studies. 

They manipulated three factors (motivation; stimulus discrimination and features; perceptual learning) that affect perception to see how the tachometric curve responds. 

Areas that need further work include effect of expectation, multisensory decision making and neural correlates of perceptual changes (areas and mechanisms). 
0 Comments

Neurobiology of Perception, Attention and Consciousness - Seminar by Arun

1/12/2011

0 Comments

 
Dr. Arun Sasidharan (2nd year PhD scholar) presented his seminar on "Neurobiology of Perception, Attention and Consciousness" on 25th Nov, 2011. He tried to link the three phenomena into a continua, giving examples from visual perception. The concept of Qualia was also explained, and used it to address the hurdles confronted by neuroscience in the quest for Neural correlates of Consciousness. There were some thought provoking debates regarding the contribution by computational methods and

References:
  1. Three Laws of Qualia - What Neurology Tells Us about the Biological Functions of Consciousness, Qualia and the Self - by V. S. Ramachandran and William Hirstein, Journal of Consciousness Studies, 4, No. 5-6, 1997, pp. 429–58 
  2. Consciousness and the Binding Problem by Wolf Singer, Max Planck Institute for Brain Research, Frankfurt/Main, Germany 
  3. Can neuroscience reveal the true nature of consciousness? - by Victor A.F. Lamme, Cognitive Neuroscience Group, Room A626, Department of Psychology, University of Amsterdam
0 Comments

    Author

    NPhy Times

    Archives

    August 2019
    July 2019
    September 2018
    August 2018
    December 2016
    August 2016
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    April 2014
    March 2014
    February 2014
    January 2014
    December 2013
    November 2013
    October 2013
    September 2013
    August 2013
    July 2013
    June 2013
    April 2013
    March 2013
    February 2013
    January 2013
    December 2012
    November 2012
    October 2012
    September 2012
    August 2012
    July 2012
    June 2012
    May 2012
    March 2012
    February 2012
    January 2012
    December 2011
    November 2011
    October 2011
    September 2011
    August 2011
    July 2011
    June 2011

    RSS Feed

    Categories

    All
    Ageing
    Alcohol
    Als
    Amygdala
    Animal Models
    Announcements
    Anxiety
    Aphasia
    Association Areas
    Astrocyte
    Attention
    Autism
    Autonomic Nervous System
    Ayurveda
    Basal Ganglia
    Behaviour
    Blind
    Brain Stem
    Breathing
    Buddhism
    Calcium
    Celebrations
    Cell Culture
    Central Pattern Generators
    Cerebellum
    Cognition
    Complexity
    Conference
    Consciousness
    Convocation
    Corollary Discharge
    Department Meeting
    Depression
    Developmental Disorders
    Drug Delivery
    Eeg
    Electrophysiology
    Enriched Environment
    Ep
    Epigenetics
    Epilepsy
    Erp
    Evolution
    Excitotoxicity
    External Speakers
    Fear
    FMRI
    Genetics
    Glia
    Guest Lecture
    Hippocampus
    Histamine
    Histology
    Hypertension
    Hypothalamus
    Hypoxia
    Imaging
    Immune System
    Infants
    Information Theory
    Interneurons
    Ion Channels
    Journal Club
    Language
    Learning
    Learning And Memory
    Life
    Linguistics
    Ltp
    Maternal Separation
    Meditation
    Memory
    Microglia
    Migraine
    Mitichondrial Dysfunction
    Molecular Biology
    Mood
    Motor Activity
    Mptp
    Nerve Regeneration
    Neural Plasticity
    Neurobiology
    Neurodegeneration
    Neurodevelopment
    Neurogenesis
    Neuroinflammation
    Neurorehabilitation
    Neurotransmitters
    New Publication
    News
    Nimhans Events
    OFC
    Optogenetics
    Parkinsons Disease
    People
    Perception
    Pharmacology
    PhD Progress Report
    Phd Thesis
    Podcast
    Pre-Bötzinger Complex
    Prefrontal Cortex
    Prenatal
    Project
    Psychology
    Psychophysics
    Research
    Respiration
    Rhythmogenesis
    Schizophrenia
    Seminar
    Sfn
    Signalling
    Single Unit
    Sleep
    Social Behavior
    Sodium
    Source Localization
    Speech
    Spinal Cord
    Statistics
    Stem Cells
    Stress
    Stroke
    Suicide
    Synapse
    Synaptic Plasticity
    Synaptogenesis
    Synucleinopathy
    Temperature
    Thalamocortical Organization
    Thyroid
    Vision
    Well Being
    Workshop
    Yoga

    RSS Feed

Powered by Create your own unique website with customizable templates.