Perceptual learning of fine contrast discrimination changes neuronal tuning and population coding in macaque V4
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Perceptual learning of fine contrast discrimination changes neuronal tuning and population coding in macaque V4. / Sanayei, Mehdi; Chen, Xing; Chicharro, Daniel; Distler, Claudia; Panzeri, Stefano; Thiele, Alexander.
In: NAT COMMUN, Vol. 9, No. 1, 12.10.2018, p. 4238.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Perceptual learning of fine contrast discrimination changes neuronal tuning and population coding in macaque V4
AU - Sanayei, Mehdi
AU - Chen, Xing
AU - Chicharro, Daniel
AU - Distler, Claudia
AU - Panzeri, Stefano
AU - Thiele, Alexander
PY - 2018/10/12
Y1 - 2018/10/12
N2 - Perceptual learning, the improvement in perceptual abilities with training, is thought to be mediated by an alteration of neuronal tuning. It remains poorly understood how tuning properties change as training progresses, whether improved stimulus tuning directly links to increased behavioural readout of sensory information, or how population coding mechanisms change with training. Here, we recorded continuously from multiple neuronal clusters in area V4 while macaque monkeys learned a fine contrast categorization task. Training increased neuronal coding abilities by shifting the steepest point of contrast response functions towards the categorization boundary. Population coding accuracy of difficult discriminations resulted largely from an increased information coding of individual channels, particularly for those channels that in early learning had larger ability for easy discriminations, but comparatively small encoding abilities for difficult discriminations. Population coding was also enhanced by specific changes in correlations. Neuronal activity became more indicative of upcoming choices with training.
AB - Perceptual learning, the improvement in perceptual abilities with training, is thought to be mediated by an alteration of neuronal tuning. It remains poorly understood how tuning properties change as training progresses, whether improved stimulus tuning directly links to increased behavioural readout of sensory information, or how population coding mechanisms change with training. Here, we recorded continuously from multiple neuronal clusters in area V4 while macaque monkeys learned a fine contrast categorization task. Training increased neuronal coding abilities by shifting the steepest point of contrast response functions towards the categorization boundary. Population coding accuracy of difficult discriminations resulted largely from an increased information coding of individual channels, particularly for those channels that in early learning had larger ability for easy discriminations, but comparatively small encoding abilities for difficult discriminations. Population coding was also enhanced by specific changes in correlations. Neuronal activity became more indicative of upcoming choices with training.
KW - Animals
KW - Electrophysiology
KW - Learning/physiology
KW - Macaca mulatta
KW - Male
KW - Neuronal Plasticity/genetics
KW - Neurons/cytology
KW - Visual Cortex/cytology
KW - Visual Perception/genetics
U2 - 10.1038/s41467-018-06698-w
DO - 10.1038/s41467-018-06698-w
M3 - SCORING: Journal article
C2 - 30315163
VL - 9
SP - 4238
JO - NAT COMMUN
JF - NAT COMMUN
SN - 2041-1723
IS - 1
ER -