Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Nat Commun ; 12(1): 6036, 2021 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-34654804

RESUMO

Identical physical inputs do not always evoke identical percepts. To investigate the role of stimulus history in tactile perception, we designed a task in which rats had to judge each vibrissal vibration, in a long series, as strong or weak depending on its mean speed. After a low-speed stimulus (trial n - 1), rats were more likely to report the next stimulus (trial n) as strong, and after a high-speed stimulus, they were more likely to report the next stimulus as weak, a repulsive effect that did not depend on choice or reward on trial n - 1. This effect could be tracked over several preceding trials (i.e., n - 2 and earlier) and was characterized by an exponential decay function, reflecting a trial-by-trial incorporation of sensory history. Surprisingly, the influence of trial n - 1 strengthened as the time interval between n - 1 and n grew. Human subjects receiving fingertip vibrations showed these same key findings. We are able to account for the repulsive stimulus history effect, and its detailed time scale, through a single-parameter model, wherein each new stimulus gradually updates the subject's decision criterion. This model points to mechanisms underlying how the past affects the ongoing subjective experience.


Assuntos
Julgamento/fisiologia , Percepção/fisiologia , Animais , Comportamento , Humanos , Masculino , Memória de Curto Prazo/fisiologia , Redes Neurais de Computação , Neurônios/fisiologia , Ratos , Recompensa , Percepção do Tato/fisiologia , Vibração , Vibrissas/fisiologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...