TY - JOUR
T1 - ‘Delaying’ a saccade
T2 - Preparatory phase cortical hemodynamics evince the neural cost of response inhibition
AU - Tari, Benjamin
AU - Shirzad, Mustafa
AU - Badcock, Nicholas A.
AU - Belfry, Glen R.
AU - Heath, Matthew
PY - 2021/11
Y1 - 2021/11
N2 - Minimally delayed (MD) saccades require inhibition of a prepotent response until a target is extinguished, and unlike the more extensively studied antisaccade task, do not require the additional cognitive component of vector inversion (i.e., 180° target spatial transposition). Here, participants completed separate blocks of MD and prepotent stimulus-driven saccades (i.e., respond at target onset) while cortical hemodynamics were measured via functional transcranial Doppler ultrasound. MD saccades produced longer and more variable reaction times (RT). In turn, MD and stimulus-driven saccade preparatory phase cortical hemodynamics increased and decreased, respectively, relative to baseline and the two conditions differed from one another throughout the preparatory phase. The longer RTs and increased cortical hemodynamics of MD saccades is taken to evince response complexity and the increased neural activity to accommodate response inhibition. To our knowledge, such findings provide the first work to examine the neural foundations of MD saccades.
AB - Minimally delayed (MD) saccades require inhibition of a prepotent response until a target is extinguished, and unlike the more extensively studied antisaccade task, do not require the additional cognitive component of vector inversion (i.e., 180° target spatial transposition). Here, participants completed separate blocks of MD and prepotent stimulus-driven saccades (i.e., respond at target onset) while cortical hemodynamics were measured via functional transcranial Doppler ultrasound. MD saccades produced longer and more variable reaction times (RT). In turn, MD and stimulus-driven saccade preparatory phase cortical hemodynamics increased and decreased, respectively, relative to baseline and the two conditions differed from one another throughout the preparatory phase. The longer RTs and increased cortical hemodynamics of MD saccades is taken to evince response complexity and the increased neural activity to accommodate response inhibition. To our knowledge, such findings provide the first work to examine the neural foundations of MD saccades.
KW - Executive function
KW - functional transcranial Doppler ultrasound
KW - Reaction time
KW - Vision
UR - http://www.scopus.com/inward/record.url?scp=85116884765&partnerID=8YFLogxK
U2 - 10.1016/j.bandc.2021.105808
DO - 10.1016/j.bandc.2021.105808
M3 - Article
C2 - 34634572
AN - SCOPUS:85116884765
SN - 0278-2626
VL - 154
JO - Brain and Cognition
JF - Brain and Cognition
M1 - 105808
ER -