Featured Research

from universities, journals, and other organizations

Olfactory Bulb Size May Change As Sense Of Smell Changes

Date:
June 18, 2008
Source:
JAMA and Archives Journals
Summary:
The olfactory bulb in the brain appears to change in size in a way that corresponds to individual alterations in sense of smell, according to a report in the Archives of Otolaryngology -- Head & Neck Surgery.

The olfactory bulb in the brain appears to change in size in a way that corresponds to individual alterations in sense of smell, according to a new report.

The size of the olfactory bulb has been studied in patients who have lost their sense of smell due to injury, infection, congenital conditions or neurodegenerative diseases, as well as in those with a normal sense of smell, according to background information in the article. Research indicates that the size of the olfactory bulb changes throughout adult life.

Antje Haehner, M.D., and colleagues at University of Dresden Medical School, Germany, studied 20 patients with loss of sense of smell, or "olfactory loss." Once between 2003 and 2004 and again 13 to 19 months later, patients underwent an assessment that included magnetic resonance imaging (MRI) of the brain and nasal endoscopy, an examination of the nose with a lighted, flexible instrument known as an endoscope. Their olfactory function was tested using a kit that measures individuals' threshold of detecting odors, ability to discriminate between odors and identification of particular odors.

At the first assessment, seven of the 20 patients had no sense of smell (anosmia) and 13 had a reduced sense of smell (hyposmia), while at the second assessment six had anosmia and 14 had hyposmia. In patients who initially had hyposmia, the volume of the olfactory bulb increased as olfactory function increased. However, no correlation was found between the volume of the olfactory bulb and the ability to distinguish between or identify specific odors.

"The correlation between olfactory bulb volume and olfactory function may potentially be used in combination with other factors influencing olfaction such as remaining olfactory function, age and duration of olfactory loss as a means to provide patients with individual information on the prognosis of their disease," the authors write. "Hypothetically, a multifactorial approach could be applied to eventually come up with a formula that would allow a more precise prognosis of olfactory function. Especially since therapeutic options in patients with olfactory loss are limited, at present, this type of information is of high clinical significance."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Antje Haehner; Antje Rodewald; Johannes C. Gerber; Thomas Hummel. Correlation of Olfactory Function With Changes in the Volume of the Human Olfactory Bulb. Arch Otolaryngol Head Neck Surg., 2008;134(6):621-624 [link]

Cite This Page:

JAMA and Archives Journals. "Olfactory Bulb Size May Change As Sense Of Smell Changes." ScienceDaily. ScienceDaily, 18 June 2008. <www.sciencedaily.com/releases/2008/06/080616163428.htm>.
JAMA and Archives Journals. (2008, June 18). Olfactory Bulb Size May Change As Sense Of Smell Changes. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2008/06/080616163428.htm
JAMA and Archives Journals. "Olfactory Bulb Size May Change As Sense Of Smell Changes." ScienceDaily. www.sciencedaily.com/releases/2008/06/080616163428.htm (accessed October 23, 2014).

Share This



More Health & Medicine News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Working Mother (Oct. 22, 2014) Is your child ready? Video provided by Working Mother
Powered by NewsLook.com
U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

Newsy (Oct. 22, 2014) Now that the U.S. is restricting travel from West Africa, some are dropping questions about a travel ban and instead asking about visa bans. Video provided by Newsy
Powered by NewsLook.com
US to Track Everyone Coming from Ebola Nations

US to Track Everyone Coming from Ebola Nations

AP (Oct. 22, 2014) Stepping up their vigilance against Ebola, federal authorities said Wednesday that everyone traveling into the US from Ebola-stricken nations will be monitored for symptoms for 21 days. (Oct. 22) Video provided by AP
Powered by NewsLook.com
Doctors Help Paralysed Man Walk Again, Patient in Disbelief

Doctors Help Paralysed Man Walk Again, Patient in Disbelief

AFP (Oct. 22, 2014) Polish doctors describe how they helped a paralysed man walk again, with the patient in disbelief at the return of sensation to his legs. Duration: 1:04 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins