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A functional role for the ventrolateral prefrontal cortex in non-spatial auditory cognition.

Y E Cohen¹, B E Russ, S J Davis

¹Department of Otorhinolaryngology, Head and Neck Surgery, University of Pennsylvania School of Medicine, 3400 Spruce-5 Ravdin, Philadelphia, PA 19104, USA. ycohen@mail.med.upenn.edu

Proceedings of the National Academy of Sciences of the United States of America

|November 10, 2009

Summary

The ventrolateral prefrontal cortex (vPFC) processes non-spatial auditory information, not spatial. Neuronal activity in the vPFC correlated with task performance in non-spatial auditory tasks.

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Area of Science:

Neuroscience
Auditory Neuroscience
Cognitive Neuroscience

Background:

Sensory information is processed through parallel pathways, with spatial and non-spatial information potentially segregated.
The ventrolateral prefrontal cortex (vPFC) is a region implicated in the non-spatial auditory pathway.

Purpose of the Study:

To investigate the spatial and non-spatial sensitivity of auditory neurons within the vPFC.
To determine the functional role of the vPFC in auditory processing and cognition.

Main Methods:

Non-human primates were trained to perform auditory tasks requiring discrimination of spatial and non-spatial features.
Neuronal activity in the vPFC was recorded during these tasks.
Behavioral performance was correlated with neuronal modulation.

Main Results:

vPFC neurons showed significant modulation during non-spatial auditory tasks.
vPFC neurons did not exhibit modulation during spatial auditory tasks.
The extent of neuronal modulation in the non-spatial task positively correlated with behavioral accuracy.

Conclusions:

The vPFC is likely part of a neural circuit dedicated to non-spatial auditory processing.
The vPFC plays a functional role in non-spatial auditory cognition.
Findings support the parallel processing hypothesis for auditory information in the brain.