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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:Clocking perceptual processing speed
DTSTART:20110922T151500
DTSTAMP:20260408T104447Z
UID:75a665f261a55d1e6f4a71116df6ccafb82171ffa02f1d306cfc619e
CATEGORIES:Miscellaneous
DESCRIPTION:Emilio SALINAS\nIn situations that require a fast action in re
 sponse to a sensory event  success depends on the interplay between percep
 tual and motor neural processes  both of which contribute to the total amo
 unt of time that a subject needs to respond. Although in most choice parad
 igms one can only measure this combined quantity  the reaction time  the p
 erceptual and motor components can be accurately dissociated under certain
  conditions\; the key is to present the relevant sensory information after
  the instruction to make a response. I will discuss tasks with this partic
 ular feature  in which psychophysical performance can be understood as the
  result of an ongoing motor program that is modified by the outcome of a p
 erceptual process. This interaction is described quantitatively by simple 
 phenomenological models in which saccade planning is conceived as a gradua
 l build-up of oculomotor activity toward a threshold value  but such that 
 the rising neural activity can be accelerated after the relevant sensory c
 ue appears. This framework achieves three things: (1) it replicates and re
 conciles behavioral results in numerous experiments  (2) it shows that the
  detection and discrimination of high-visibility stimuli are extremely fas
 t  requiring on the order of 25 ms of effective viewing time  and (3) it m
 akes specific predictions about the neuronal activity that should be obser
 ved across a variety of experimental conditions.
LOCATION:BC 01 https://plan.epfl.ch/?room==BC%2001
STATUS:CONFIRMED
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