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Related Experiment Video

Updated: May 18, 2026

Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex

Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex

Published on: March 28, 2012

Representation of three-dimensional objects by the rat perirhinal cortex.

S N Burke¹, A P Maurer, A L Hartzell

¹Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, AZ, USA.

|September 19, 2012

Summary

This summary is machine-generated.

Perirhinal cortex (PRC) neurons activate near objects during navigation. Object novelty did not alter PRC neuron activity, despite rats showing recognition memory for familiar objects.

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Last Updated: May 18, 2026

Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex

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Published on: March 28, 2012

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Area of Science:

Neuroscience
Cognitive Neuroscience
Behavioral Neuroscience

Background:

The perirhinal cortex (PRC) is crucial for object recognition memory.
Understanding PRC neuronal activity during naturalistic object encounters is limited.

Purpose of the Study:

To investigate the activity of PRC neurons in rats navigating a track with three-dimensional objects.
To determine if object novelty influences PRC neuronal firing patterns during recognition memory tasks.

Main Methods:

Rats traversed a circular track with novel, familiar, or no objects.
Neuronal activity in the PRC was recorded during object exploration.
Behavioral responses, including exploration time, were measured.

Main Results:

38% of PRC neurons exhibited "object fields," selectively increasing firing near objects.
Rats explored novel objects significantly longer than familiar objects, indicating successful recognition.
Neither the proportion of object fields nor PRC neuronal firing rates were affected by object novelty.

Conclusions:

PRC cell activity is strongly influenced by the presence of objects during navigation.
Object novelty does not modulate PRC neuronal firing patterns during successful object recognition in this task.