Journal
BRAIN RESEARCH
Volume 1000, Issue 1-2, Pages 183-191Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainres.2003.11.030
Keywords
dorsal raphe; extracellular recording; 5HT and non-5HT cells
Categories
Funding
- NINDS NIH HHS [NS34808] Funding Source: Medline
Ask authors/readers for more resources
Multi-channel. multi-neuron recording procedures were used to monitor simultaneously the spike train activity of single neurons (n=7-16 cells/animal) in the dorsal raphe (DR) nucleus of the awake, freely moving rat. Putative serotonergic and non-serotonergic neurons were distinguished front one another on the basis of established criteria, i.e. waveform shape and duration, firing pattern and firing frequency. As a croup, presumed serotonergic neurons exhibited low ionic discharge rates, depressed firing after serotonin (5HT)-la agonist administration, and, except for the transition front sleep to waking, a general insensitivity to specific sensory or motor events. By contrast, non-serotonergic cells in midline and lateral wing sub-regions of the nucleus displayed responses to a variety of sensorimotor events including locomotion,,grooming, head movement, chewing, auditory stimuli, and whisker movement (both passive and active). However, within this latter group, the sensorimotor response repertoire of individual cells was not uniform. Likewise, non-5HT cells with diverse response profiles were identified in both medial and lateral sub-regions of the nucleus. Cells categorized as non-serotonergic also had varied responses to 5HT1a agonist administration. These results emphasize the diverse input/output relationships of individual DR neurons and underscore the need fora more comprehensive analysis Of Such properties under waking conditions in order to obtain a better understanding of the role of the DR nucleus in brain function. (C) 2003 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available