Tactile perception and working memory in rats and humans.

Abstract:

:Primates can store sensory stimulus parameters in working memory for subsequent manipulation, but until now, there has been no demonstration of this capacity in rodents. Here we report tactile working memory in rats. Each stimulus is a vibration, generated as a series of velocity values sampled from a normal distribution. To perform the task, the rat positions its whiskers to receive two such stimuli, "base" and "comparison," separated by a variable delay. It then judges which stimulus had greater velocity SD. In analogous experiments, humans compare two vibratory stimuli on the fingertip. We demonstrate that the ability of rats to hold base stimulus information (for up to 8 s) and their acuity in assessing stimulus differences overlap the performance demonstrated by humans. This experiment highlights the ability of rats to perceive the statistical structure of vibrations and reveals their previously unknown capacity to store sensory information in working memory.

authors

Fassihi A,Akrami A,Esmaeili V,Diamond ME

doi

10.1073/pnas.1315171111

subject

Has Abstract

pub_date

2014-02-11 00:00:00

pages

2331-6

issue

6

eissn

0027-8424

issn

1091-6490

pii

1315171111

journal_volume

111

pub_type

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