Journal
MOLECULAR NEUROBIOLOGY
Volume 44, Issue 3, Pages 449-464Publisher
HUMANA PRESS INC
DOI: 10.1007/s12035-011-8214-0
Keywords
Prefrontal cortex; Serotonin receptors; Neural oscillations; Pyramidal neuron; Fast-spiking interneuron; Electrophysiology
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Funding
- Spanish government
- Japanese government
- U.S. government
- Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS)
- Japan Society for the Promotion of Science (JSPS)
- NARSAD from the Brain and Behavior Research Foundation
- PHS [R01 MH83806]
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Higher-order executive tasks such as learning, working memory, and behavioral flexibility depend on the prefrontal cortex (PFC), the brain region most elaborated in primates. The prominent innervation by serotonin neurons and the dense expression of serotonergic receptors in the PFC suggest that serotonin is a major modulator of its function. The most abundant serotonin receptors in the PFC, 5-HT1A, 5-HT2A and 5-HT3A receptors, are selectively expressed in distinct populations of pyramidal neurons and inhibitory interneurons, and play a critical role in modulating cortical activity and neural oscillations (brain waves). Serotonergic signaling is altered in many psychiatric disorders such as schizophrenia and depression, where parallel changes in receptor expression and brain waves have been observed. Furthermore, many psychiatric drug treatments target serotonergic receptors in the PFC. Thus, understanding the role of serotonergic neurotransmission in PFC function is of major clinical importance. Here, we review recent findings concerning the powerful influences of serotonin on single neurons, neural networks, and cortical circuits in the PFC of the rat, where the effects of serotonin have been most thoroughly studied.
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