Ulster University Logo

Ulster Institutional Repository

Temporal dynamics underlying perceptual decision making: Insights from the interplay between an attractor model and parietal neurophysiology

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Wong, Kong-Fatt and Huk, Alexander (2008) Temporal dynamics underlying perceptual decision making: Insights from the interplay between an attractor model and parietal neurophysiology. Frontiers in Neuroscience, 2 (2). pp. 245-254. [Journal article]

[img]PDF - Published Version
2417Kb

URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2622760/

DOI: 10.3389/neuro.01.028.2008

Abstract

Recent neurophysiological studies in awake, behaving primates have revealed that neurons in certain brain areas appear to integrate sensory evidence over time during the performance of perceptual decision-making tasks. Neurons in the lateral intraparietal area (LIP) of rhesus monkeys exhibit such decision-related signals while the animals view and judge the direction of a visual motion display. Further investigation of this temporal integration process using brief perturbations of the sensory evidence has suggested that LIP neurons do not integrate evidence in a perfect, linear manner. We describe how a biophysically-plausible attractor network model can account for many aspects of the temporal dynamics of neural activity during these perceptual decisions. We also review a larger set of models and explain how the dynamics during and after temporal integration can help to distinguish the underlying neural mechanisms. Finally, we propose some crucial theoretically-motivated experiments that are needed to test among models.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Computing and Intelligent Systems
Research Institutes and Groups:Computer Science Research Institute
Computer Science Research Institute > Intelligent Systems Research Centre
ID Code:21352
Deposited By:Dr Kongfatt Wong-Lin
Deposited On:09 Mar 2012 14:54
Last Modified:09 Mar 2012 14:54

Repository Staff Only: item control page