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Updated: May 16, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Single neuron activity and theta modulation in postrhinal cortex during visual object discrimination.

Sharon C Furtak1, Omar J Ahmed, Rebecca D Burwell

  • 1Department of Cognitive, Linguistics and Psychological Sciences, Brown University, Providence, RI 02912, USA.

Neuron
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

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The postrhinal cortex links objects to places, aiding spatial and contextual memory. Theta rhythms in this brain region also signal decision errors, suggesting broader cognitive roles.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Spatial Navigation

Background:

  • The postrhinal cortex, homologous to the primate parahippocampal cortex, is crucial for processing spatial and contextual information.
  • Its precise role in forming object-place associations and its involvement in cognitive functions remain areas of active investigation.

Purpose of the Study:

  • To investigate the function of the postrhinal cortex in encoding context by forming object-place representations.
  • To examine the role of postrhinal neural activity and theta oscillations during a spatial discrimination task.

Main Methods:

  • Electrophysiological recordings of postrhinal neurons and local field potentials (LFPs) in rats.
  • Rats were trained on a two-choice visual discrimination task to assess spatial and contextual processing.

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Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
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Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit
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Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit

Published on: August 2, 2017

Related Experiment Videos

Last Updated: May 16, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
09:35

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG

Published on: March 10, 2017

Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit
11:37

Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit

Published on: August 2, 2017

Main Results:

  • Many postrhinal neurons were found to signal object-location conjunctions, supporting the hypothesis of context encoding.
  • A significant proportion of neurons encoded egocentric motor responses, and postrhinal LFPs showed theta band oscillations.
  • Theta power increased after incorrect decisions, suggesting a role in error signaling beyond motor activity.

Conclusions:

  • The postrhinal cortex encodes representations linking objects to specific places, contributing to contextual memory.
  • Postrhinal theta modulation is implicated not only in spatial functions but also in cognitive processes like error detection.