Format

Send to

Choose Destination
See comment in PubMed Commons below
Brain Res. 2011 Mar 24;1381:117-23. doi: 10.1016/j.brainres.2011.01.053. Epub 2011 Jan 23.

Rose odor can innately counteract predator odor.

Author information

1
Department of Functional Morphology, Nihon University School of Medicine, Itabashi, Tokyo 173-8610, Japan. matsukawa.mutsumi@nihon-u.ac.jp

Abstract

When animals smell a predator odor such as 2,5-Dihydro-2,4,5-trimethylthiazoline (TMT), even if it is a novel substance, the hypothalamo-pituitary-adrenal (HPA) axis is activated, causing stress-like behaviors. Although the medial part of the bed nucleus of stria terminalis (mBST) is known to be involved in this process, the mechanism remains unclear. Moreover, it is unknown whether there is any odor that can counteract the predator odor, even when the odorants are novel substances for the animals. In this study, we assessed whether rose odor can counteract by counting the number of activated neurons in mice brain following the presentation of rose odor with or without TMT for 30 min. The number of activated cells in the mBST and in the ventrorostral part of the anterior piriform cortex (APC) was significantly reduced by a mixture of TMT and rose odor; however, no significant differences were noted in the dorsal part of the APC and in the olfactory bulb (OB) following TMT presentation with or without rose odor. The results suggest that rose odor may counteract the TMT-induced stress response in the OB and/or APC and suppress the neural circuit to the mBST. It also indicates that there are some odors that can innately counteract predator odor, even when they have not been experienced before.

PMID:
21266167
DOI:
10.1016/j.brainres.2011.01.053
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center