Título del libro: Percept, Decision, Action: Bridging The Gaps
Título del capítulo: Decoding the temporal evolution of a simple perceptual act
RANULFO ROMO TRUJILLO; ADRIAN HERNANDEZ ALVA; ANTONIO PAULINO ZAINOS ROSALES; LUIS ALONSO LEMUS SANDOVAL; VICTOR HUGO DE LAFUENTE FLORES;
Autores externos:
Idioma:
Inglés
Año de publicación:
2008
Palabras clave:
Perceptual decision making process; Perceptual task and neural operation chain; Sensory-and motor-related activity continuum; Temporal evolution; Vibrotactile discrimination task
Resumen:
Most perceptual tasks require sequential steps to be carried out. This must be the case, for example, when subjects discriminate the difference in frequency between two mechanical vibrations applied sequentially to their fingertips. This perceptual task can be understood as a chain of neural operations: encoding the two consecutive stimulus frequencies, maintaining the first stimulus in working memory, comparing the second stimulus to the memory trace left by the first stimulus, and communicating the result of the comparison to the motor apparatus. Where and how in the brain are these cognitive operations executed? We addressed this problem by recording single neurons from several cortical areas while trained monkeys executed the vibrotactile discrimination task. We found that primary somatosensory cortex (S1) drives higher cortical areas where past and current sensory information are combined, such that a comparison of the two evolves into a decision. Consistent with this result, direct activation of the S1 can trigger quantifiable percepts in this task. These findings provide a fairly complete panorama of the neural dynamics that underlies the transformation of sensory information into an action and emphasize the importance of studying multiple cortical areas during the same behavioural task. © Novartis Foundation 2006. All Rights Reserved.
Entidades citadas de la UNAM:
ISBN:
9780470034989
Editorial:
wiley Nombre de la publicación:
Decoding the temporal evolution of a simple perceptual act
Página inicial:
170
Página final:
190
