Noradrenergic modulation of dendrodendritic inhibition in the olfactory bulb

Craig Jahr, R. A. Nicoll

Research output: Contribution to journalArticle

136 Citations (Scopus)

Abstract

Noradrenaline containing fibres in the central nervous system (CNS) have been characterized in detail by histochemical techniques1-3. A particularly striking feature of this neurotransmitter system is its diffuse pattern of innervation. Although noradrenaline generally inhibits spontaneous activity of neurones4-7, in a number of systems5,8-10 it can actually enhance orthodromic excitatory responses. Enhancement of excitatory transmission through sensory relay neurones is consistent with the view that noradrenergic systems are intimately involved in such behaviours as arousal and attention11. However, the basis for this enhancement is unclear. Two proposed hypotheses are a facilitation of excitatory transmitter action 5 and a disinhibitory action in which noradrenaline inhibits inhibitory inter-neurones8. The olfactory bulb is ideally suited for studying the cellular action of noradrenaline because the neuronal circuitry is relatively simple. Using intracellular recording techniques we have now found that noradrenaline attenuates the inhibitory feedback onto relay neurones, thus facilitating their firing, while glutamate and aspartate augment the inhibitory feedback.

Original languageEnglish (US)
Pages (from-to)227-229
Number of pages3
JournalNature
Volume297
Issue number5863
DOIs
StatePublished - 1982
Externally publishedYes

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Olfactory Bulb
Norepinephrine
Sensory Receptor Cells
Arousal
Aspartic Acid
Neurotransmitter Agents
Glutamic Acid
Central Nervous System
Inhibition (Psychology)
Neurons

ASJC Scopus subject areas

  • General

Cite this

Noradrenergic modulation of dendrodendritic inhibition in the olfactory bulb. / Jahr, Craig; Nicoll, R. A.

In: Nature, Vol. 297, No. 5863, 1982, p. 227-229.

Research output: Contribution to journalArticle

Jahr, Craig ; Nicoll, R. A. / Noradrenergic modulation of dendrodendritic inhibition in the olfactory bulb. In: Nature. 1982 ; Vol. 297, No. 5863. pp. 227-229.
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