Navigation Links
Researcher finds gender differences in seasonal auditory changes
Date:12/10/2012

ATLANTA Auditory systems differ between sexes in sparrows depending on the season, a Georgia State University neuroscientist has found. The work adds to our knowledge of how the parts of the nervous system, including that of humans, are able to change.

Megan Gall, a post-doctoral researcher with Georgia State's Neuroscience Institute, tested the peripheral auditory systems of male and female house sparrows, comparing the hearing of each gender during non-breeding seasons and breeding seasons.

Gall measured frequency selectivity the ability to tell sounds that are close in frequency apart, and temporal resolution, the ability to tell sounds apart that are very close together in time.

"We found that males have the same frequency selectivity and temporal resolution across breeding seasons," Gall said. "In the fall, males and females aren't different. But in the breeding season, females had better frequency selectivity, but this came at the expense of worse temporal resolution."

The study was published in the Proceedings of the Royal Society B, a British scientific journal.

The difference shows "plasticity," the ability to change, she said. Plasticity is an important concept in neuroscience, as scientists have increasingly been able to show that neurological systems have the ability to change.

Gall said the work shows, for the first time, that there's seasonal plasticity in these properties in the periphery of the auditory system, the ear and the auditory nerve, not just inside the parts of the brain that control auditory function.

Similar changes happen in humans, she said. Women show different auditory sensitivities during the course of a menstrual cycle.

"I always like to say that if your husband says he can't hear you, it may be that he can't. His auditory system is different than yours," Gall said.

The changes might have evolved over time for different reasons, she said, with one reason being that it is harder for the body to maintain a certain kind of tissues involved in hearing.

"In the ear, there are huge electrical gradients between the hair cells and the fluid that's bathing the hair cells in the ear, and that's expensive to maintain," she said. "Another possible reason is that there are other stimuli that you are concerned about during the non-breeding season.

"These birds live in an environment where it gets cold, it's hard to find food and they make calls that tell other individuals where that food is. So everybody wants to hear the call in the same way so that they all respond to that signal."

Alarm calls, warnings that a predator or predators are coming, might also require different kinds of auditory processing.


'/>"/>

Contact: Jeremy Craig
jcraig@gsu.edu
404-413-1357
Georgia State University
Source:Eurekalert

Related biology news :

1. Researchers find new genetic pathway behind neurodevelopmental disorders
2. Researchers investigate impacts of climate change on rare tropical plants
3. Researchers identify proteins that indicate which kidney tumors are most likely to spread
4. Microchoreography: Researchers use synthetic molecule to guide cellular dance
5. Einstein researchers receive 2 Grand Challenges Explorations grants to combat HIV and TB
6. University of Tennessee researchers find fungus has cancer-fighting power
7. UC Davis researchers aid effort to sequence the complex wheat genome
8. UF researcher tests powerful new tool to advance ecology, conservation
9. Joslin researchers increase understanding of genetic risk factor for type 1 diabetes
10. Fracking in Michigan: U-M researchers study potential impact on health, environment, economy
11. NREL researchers use imaging technologies to solve puzzle of plant architecture
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... Florida , April 11, 2017 ... a security technology company, announces the appointment of independent Directors ... Bendheim to its Board of Directors, furthering the company,s ... ... of NXT-ID, we look forward to their guidance and benefiting ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... anticipated to expand at a CAGR of 25.76% during ... diseases is the primary factor for the growth of ... report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global ... product, technology, application, and geography. The stem cell market ...
(Date:3/30/2017)... March 30, 2017 The research team of ... three-dimensional (3D) fingerprint identification by adopting ground breaking 3D fingerprint minutiae ... realm of speed and accuracy for use in identification, crime investigation, ... cost. ... A research ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... , ... October 10, 2017 , ... Dr. Bob Harman, ... his local San Diego Rotary Club. The event entitled “Stem Cells ... and had 300+ attendees. Dr. Harman, DVM, MPVM was joined by two human ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee ... honoring scientists who have made outstanding contributions to analytical chemistry and applied ... the world’s leading conference and exposition for laboratory science, which will be held ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving Tree Wellness Center ... the needs of consumers who are incorporating medical marijuana into their wellness and ... , As operators of two successful Valley dispensaries, The Giving Tree’s two founders, ...
(Date:10/7/2017)... 6, 2017  The 2017 Nobel Prize in ... Jacques Dubochet, Joachim Frank and ... cryo-electron microscopy (cryo-EM) have helped to broaden ... biology community. The winners worked with systems manufactured ... produce highly resolved, three-dimensional images of protein structures ...
Breaking Biology Technology: