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An electrophysiological study of convergence of entopeduncular and lateral preoptic inputs on lateral habenular neurons projecting to the midbrain
- Source :
- Brain Research. 263:33-41
- Publication Year :
- 1983
- Publisher :
- Elsevier BV, 1983.
-
Abstract
- Extracellular recordings were made from single neurons in the lateral habenular nucleus of urethane-anesthetized rats. Single pulse stimulation of the entopeduncular nucleus influenced the spontaneous activity of 200 out of 293 (68%) lateral habenular neurons tested, with the most frequent response being suppression of activity and initial activation followed by suppression. Single pulse stimulation of the lateral preoptic area influenced the activity of 140 out of 165 (85%) lateral habenular neurons tested. Responses were similar to those for entopeduncular stimulation. In a series of 137 lateral habenular units, 85 (62%) were influenced by stimulation of both sites indicating convergence of inputs from these two forebrain areas. Approximately half of the lateral habenular neurons which received converging inputs from entopeduncular nucleus and lateral preoptic area were activated antidromically by stimulation of the fasciculus retroflexus, indicating that they were output neurons. These electrophysiological findings support the suggestion from recent neuroanatomical studies that the lateral habenular nucleus is a site of integration for entopenduncular and limbic inputs and in turn sends signals to the midbrain.
- Subjects :
- Male
Stimulation
Biology
Globus Pallidus
Synaptic Transmission
Lateral habenular nucleus
Midbrain
Mesencephalon
Limbic System
Reaction Time
Animals
Evoked Potentials
Molecular Biology
Neurons
Afferent Pathways
Brain Mapping
General Neuroscience
Lateral preoptic area
Median Eminence
Rats, Inbred Strains
Anatomy
Preoptic Area
Electric Stimulation
Rats
Electrophysiology
nervous system
Forebrain
Raphe Nuclei
Neurology (clinical)
Raphe nuclei
Neuroscience
Entopeduncular nucleus
Developmental Biology
Subjects
Details
- ISSN :
- 00068993
- Volume :
- 263
- Database :
- OpenAIRE
- Journal :
- Brain Research
- Accession number :
- edsair.doi.dedup.....b11a757bd285225d2909c3724748a505