Navigation Links
Study: The new buzz on detecting tinnitus
Date:10/3/2009

SAN DIEGO - It's a ringing, a buzzing, a hissing or a clicking - and the patient is the only one who can hear it.

Complicating matters, physicians can rarely pinpoint the source of tinnitus, a chronic ringing of the head or ears that can be as quiet as a whisper or as loud as a jackhammer.

Now a Henry Ford Hospital study finds that a non-invasive imaging technique can actually aid in the diagnosis of tinnitus and may detect a reduction in symptoms after different treatments, offering hope to the more than 50 million patients with tinnitus.

"Until now, we had no way of pinpointing the specific location of tinnitus in the brain," says study co-author Michael D. Seidman, M.D., F.A.C.S., director of the Division of Otologic/Neurotolgic Surgery in the Department of Otolaryngology-Head & Neck Surgery at Henry Ford Hospital.

This imaging technique, magnetoencephalography (MEG), can determine the site of perception of tinnitus in the brain, which could in turn allow physicians to target the area with electrical or chemical therapies to lessen symptoms, according to study results being presented Saturday, Oct. 3 at the American Academy of OtolaryngologyHead & Neck Surgery Foundation Annual Meeting & OTO EXPO.

"Since MEG can detect brain activity occurring at each instant in time, we are able to detect brain activity involved in the network or flow of information across the brain over a 10-minute time interval," explains co-author Susan M. Bowyer, Ph.D. bioscientific senior researcher, Department of Neurology at Henry Ford Hospital. "Using MEG, we can actually see the areas in the brain that are generating the patient's tinnitus, which allows us to target it and treat it."

Imaging techniques currently used to study tinnitus in the brain PET and fMRI provide a general location but are not successful at determining the specific site in the brain that is generating tinnitus symptoms.

MEG, by comparison, measures the very small magnetic fields generated by intracellular electrical currents in the neurons of the brain. Only 20 sites in the U.S., including Henry Ford, are equipped with a MEG scanner. MEG is presently used at these sites for pre-surgical brain mapping for patients undergoing surgery for brain tumor removal or Epilepsy treatment.

"With PET and fMRI, most of the auditory cortex of the brain lights up with activity during imaging. MEG, however, is a much more sophisticated machine and it can identify a specific tone or topic point, so only a small area in the brain lights up. It's like having the lights on in only the city of Detroit, compared to having the lights on in the entire state of Michigan," explains Dr. Seidman, director of the Otolaryngology Research Laboratory and co-director of the Tinnitus Center at Henry Ford.

For the study, Dr. Seidman and his colleagues collected MEG results from 17 patients with tinnitus and 10 patients without tinnitus. MEG data were collected for 10 minutes, and then digitally filtered. Study participants wore ear plugs to eliminate outside sounds, and kept their eyes open and fixated on one point on the ceiling in the room during testing.

With tinnitus patients who have ringing in one ear (unilateral tinnitus), MEG imaging detected the greatest amount of activity in the auditory cortex on the opposite site of the brain from their perceived tinnitus. For patients with ringing in the head or both ears (bilateral tinnitus), MEG imaging revealed activity in both hemispheres of the brain, with greater activity appearing in the opposite side of the brain of the strongest perception of tinnitus.

Patients without tinnitus had multiple small active areas in the brain, but no particular areas were found to be highly coherent during the 10-minute MEG scan.

Ultimately, Dr. Seidman says the study establishes MEG as an effective clinical tool for localizing the probably source of tinnitus in patients' brains. It also has the potential to assist with the development of future interventional strategies to alleviate tinnitus.


'/>"/>

Contact: Krista Hopson
khopson1@hfhs.org
313-874-7207
Henry Ford Health System
Source:Eurekalert

Related medicine news :

1. U of M study: Early treatment can reverse heart damage
2. New study: Pine bark reduces perimenopausal symptoms
3. U of M study: Health food supplement may curb addiction of pathological gamblers
4. New study: Pine bark extract reduces ADHD symptoms in children
5. Kaiser Permanente study: Alcohol amount, not type -- wine, beer, liquor -- triggers breast cancer
6. UGA study: Youth exposed to smokeless tobacco ads despite settlement
7. New National Medicaid Study: Minnesota Under Funds Seniors Nursing Home Care $167 Million Annually
8. Study: Modafinil is effective in treating excessive sleepiness
9. Breaking Study: Masimo Pleth Variability Index (PVI) Shown Effective in Noninvasive Detection of Changes in Ventricular Preload and Fluid Volume
10. New study: pine bark extract boosts nitric oxide production
11. Study: HPV test beats Pap in detecting cervical cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... Vegas, Nevada (PRWEB) , ... October 13, 2017 , ... ... 7® Hemp CBD Oil utilizing Purzorb™ technology. Applying the Purzorb™process to full spectrum CBD ... dose required and providing a CBD form that can be easily incorporated into liquid ...
(Date:10/13/2017)... BASKING RIDGE, N.J. (PRWEB) , ... October 13, 2017 , ... ... second annual Holly Day Market. Featuring a collection of specialty vendors and unique items ... myriad of personalized and quality-focused health and wellness services offered by the VNA. ...
(Date:10/13/2017)... Fairfax, VA (PRWEB) , ... October 13, 2017 ... ... provider of DevOps and Agile Software Development, has been awarded a contract by ... (EATS) Blanket Purchase Agreement (BPA) aims to accelerate the enterprise use of Agile ...
(Date:10/12/2017)... ... October 12, 2017 , ... Planet Fitness, one of the largest and fastest ... to open a flagship location in Covington, LA at 401 N. U.S. Highway 190, ... next to Office Depot in the Holiday Square shopping center. Its location allows it ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... drug delivery system that we intend to develop to enable prevention of a ... lead to severe hearing loss, especially in pediatric patients. For cisplatin, hearing loss ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... , Oct. 10, 2017   West Pharmaceutical ... innovative solutions for injectable drug administration, today shared the ... ID Adapter for improving the intradermal administration of polio ... Skin Vaccination Summit in May 2017 by Dr. ... Polio Department, World Health Organization (WHO), and recently published ...
(Date:10/4/2017)... Oct. 4, 2017 OBP Medical ... illuminating medical devices, today announced regulatory approval from ... Agency (or Agência Nacional de Vigilância Sanitária (ANVISA)) ... cordless surgical retractor with integrated LED light source ... illumination and exposure of a tissue pocket or ...
(Date:10/2/2017)... 2017 The Rebound mobile app is poised to ... the tide of prescription drug addiction. The app empowers users ... and stepping down their dosage in a safe, controlled manner ... 2017; the first 100,000 people to sign up will enjoy ... ...
Breaking Medicine Technology: