Navigation Links
Taste preference changes in different life stages of rats
Date:7/30/2013

7/30/13, New Orleans, LA. Research to be presented at the Annual Meeting of the Society for the Study of Ingestive Behavior (SSIB), the foremost society for research into all aspects of eating and drinking behavior, found that aging elicits changes in taste preferences and that such changes appear to be independent of taste nerve activity.

In humans and animals aging decreases dietary and energy requirements and it is generally believed that reduced consumption is related to alterations in taste preference. However, the mechanisms underlying an age-induced shift in taste preference remain unclear. Thus, the researchers investigated differences in fluid intake and taste nerve responses across different age groups of rats.

The researchers initially measured the intake of sweet, salty, umami, sour or bitter taste solutions in 5 age groups; juvenile, young-adult, adult, middle-aged and old-aged male rats. The result showed that older animals exhibit a decreased preference for sweet and umami taste and a reduced aversion to bitter taste.

Additional behavioral studies examined whether aging alters taste thresholds by measuring the consumption of simultaneously presented high- and low-concentrated taste solutions. This work revealed that taste sensitivity is lower in older rats.

To elucidate the neural mechanisms of such age-related changes in taste preference and sensitivity, electrophysiological experiments examined taste response characteristics of chorda tympani nerves. These nerves mediate gustatory information from the tongue to the brainstem. The researchers observed no significant differences in activity of the chorda tympani nerves by taste stimuli across the different age groups.

Overall, these behavioral and electrophysiological studies demonstrate that age-related changes in taste preference and sensitivity are independent of the peripheral gustatory system.

The lead author of the study, Chizuko Inui-Yamamoto, Ph.D. states, "To our knowledge, this is the first report demonstrating a reduced aversion to bitter taste in aged rats." She comments, "We had expected that these changes were due to the peripheral taste system." However, differences in electrophysiological recording of taste responses of the chorda tympani nerves across age groups were not observed. "Our studies showed that aging elicited no changes in transmission of taste information from the tongue to the central nervous system. Thus, our future work will investigate the role of the central nervous system in mediating age-induced changes in taste preference", says Inui-Yamamoto.


'/>"/>

Contact: Tracy Tarant
admin@ssib.org
847-983-3519
Society for the Study of Ingestive Behavior
Source:Eurekalert

Related biology news :

1. Fetal programming of sweet tastes elicited pleasure
2. Taste rules for kids and healthy food choices
3. Tell me where youre from and Ill tell you what tastes you prefer
4. Pottery reveals Ice Age hunter-gatherers taste for fish
5. Monell scientists help identify a missing link in taste perception
6. How the bodys energy molecule transmits 3 types of taste to the brain
7. Scientists discover how animals taste, and avoid, high salt concentrations
8. Making whole wheat bread taste and smell more appetizing
9. Cup color influences the taste of hot chocolate
10. Bitter tastes quickly turn milk chocolate fans sour
11. The taste and fragrance of orange, vanilla, rose and more — courtesy of bacteria and yeast
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... Fla. , April 11, 2017 ... and secure authentication solutions, today announced that it ... Intelligence Advanced Research Projects Activity (IARPA) to develop ... Thor program. "Innovation has been a ... IARPA,s Thor program will allow us to innovate ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
(Date:4/5/2017)... Today HYPR Corp. , leading innovator ... of the HYPR platform is officially FIDO® Certified ... architecture that empowers biometric authentication across Fortune 500 enterprises ... over 15 million users across the financial services industry, ... product suites and physical access represent a growing portion ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... multicenter, prospective clinical study that demonstrates the accuracy of the FebriDx® test, ... clinically significant acute bacterial and viral respiratory tract infections by testing the ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... its endogenous context, enabling overexpression experiments and avoiding the use of exogenous expression ... guides is transformative for performing systematic gain-of-function studies. , This complement to ...
(Date:10/11/2017)... Netherlands and LAGUNA HILLS, Calif. ... Institute of Cancer Research, London (ICR) ... MMprofiler™ with SKY92, SkylineDx,s prognostic tool to risk-stratify patients with ... known as MUK nine . The University of ... which is partly funded by Myeloma UK, and ICR will ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that give ... Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital Los Angeles ...
Breaking Biology Technology: