Publication Date:
1992-05-08
Description:
After giving birth, sheep and many other species form a selective bond with their offspring based on the sense of smell. Processing of olfactory signals is altered to allow the animals to perform this selective recognition. Lamb odors have little effect on either neurotransmitter release or electrical activity of neurons in the olfactory bulb before birth. However, after birth there is an increase in the number of mitral cells, the principal cells of the olfactory bulb, that respond to lamb odors, which is associated with increased cholinergic and noradrenergic neurotransmitter release. Selective recognition of lambs is accompanied by increased activity of a subset of mitral cells and release of glutamate and gamma-aminobutyric acid (GABA) from the dendrodendritic synapses between the mitral and granule cells. The relation between the release of each transmitter after birth also suggests an increased efficacy of glutamate-evoked GABA release.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kendrick, K M -- Levy, F -- Keverne, E B -- New York, N.Y. -- Science. 1992 May 8;256(5058):833-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Agricultural and Food Research Council, Institute of Animal Physiology and Genetics Research, Babraham, Cambridge, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1589766" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Animals, Newborn
;
Female
;
Glutamates/secretion
;
Labor, Obstetric
;
*Maternal Behavior
;
Models, Neurological
;
Neurons/physiology
;
Odors
;
Olfactory Bulb/*physiology
;
Olfactory Nerve/physiology
;
Pregnancy
;
Regression Analysis
;
Sheep
;
*Smell
;
Time Factors
;
gamma-Aminobutyric Acid/secretion
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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