HOME >> MEDICINE >> NEWS
Optic nerve disease may cause sleep disorders

St. Louis, Feb. 1, 2004 -- Young people with eye diseases that damage the inner part of the retina and optic nerve are significantly more likely to have sleep disorders than those with other types of eye disease or those with normal vision, according to researchers at Washington University School of Medicine in St. Louis.

In the February issue of the journal Ophthalmology, the investigators report on a study involving 25 students, ages 12 to 20, from the Missouri School for the Blind and 12 students with normal sight from the Thomas Jefferson School, a boarding school in suburban St. Louis. The visually impaired students were divided into two groups: Those whose visual problems were related to optic nerve disease and those whose vision loss did not involve the optic nerve. The optic nerve is made up of ganglion cells, the type of cells targeted by eye diseases such as glaucoma.

Participants with optic nerve disease were 20 times more likely to be pathologically sleepy (napping 20 or more minutes per day) than those with normal sight. They also were nine times more likely to have pathologic sleepiness than children who were blind from non-optic nerve diseases.

"We suspect these patients have difficulty using daylight to synchronize their internal rhythms to the outside world," says senior investigator Russell N. Van Gelder, M.D., Ph.D., assistant professor of ophthalmology and visual sciences and of molecular biology and pharmacology at the School of Medicine.

In recent research, Van Gelder found that the retina contains not only the photoreceptor cells called rods and cones, which translate light into vision, but it also houses non-visual photoreceptor cells called intrinsically photosensitive retinal ganglion cells (ipRG cells) that function as the eye's "light meter."

In a camera, the light meter helps a photographer determine how to set the shutter speed and whether to use a flash. By determining light levels, ipRG cells
'"/>

Contact: Jim Dryden
jdryden@wustl.edu
314-286-0110
Washington University School of Medicine
1-Feb-2004


Page: 1 2 3

Related medicine news :

1. Optical technique identifies vulnerable plaques in cardiac patients
2. Optics meeting tips: Internal fingerprints, no cell left behind, 3-D reality
3. Optical glucose sensor holds promise for diabetics and intensive care patients
4. Optical technique studies brain activity without surgery on skull
5. Optical Technology Projects Images Directly Into The Eye
6. Schepens scientists regenerate optic nerve for the first time
7. An implanted nerve stimulator helps drop foot sufferers walk faster and better
8. Engineers develop biowarfare sensing elements for future highly sensitive nerve-gas detectors
9. Drug treatment promising for halting Huntingtons-related nerve death
10. Wisconsin scientists grow critical nerve cells
11. Antibody treatment partially reverses nerve damage in Alzheimer disease

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/9/2020)... ... April 09, 2020 , ... Today, residents ... risk of COVID-19 at c19oregon.com , with a first-of-its kind local directory ... an innovative collaboration among Portland Fire & Rescue and Vital Software, makers of ...
(Date:4/9/2020)... ... April 09, 2020 , ... T1 Payments , a leader in high-risk ... shelter residents, and anyone who may be experiencing safety issues at home during this ... many families and individuals struggle with increased financial, emotional, and economic instability during the ...
(Date:4/7/2020)... ... April 07, 2020 , ... Black Jaguar-White Tiger Foundation, the ... The new range, Black Jaguar-White Tiger Hemp consists of a chewable tablet and tincture ... animal product the foundation has launched. , “It is my great Honor, to finally ...
(Date:4/5/2020)... ... April 04, 2020 , ... ... Wire), is uniting with the Yellow Ribbon Fund (YRF) to offer mental health ... organization. By continuing an ongoing partnership to launch a new initiative throughout the ...
(Date:4/2/2020)... ... April 02, 2020 , ... ... FDAnews Webinar, Tuesday April 7, 2020, 1:30-3:00 p.m. EDT, https://www.fdanews.com/cdssoftwareregulation ... of AI used to guide clinical management of the Coronavirus.* , Is one’s ...
Breaking Medicine News(10 mins):
(Date:4/9/2020)... (PRWEB) , ... April 09, 2020 , ... ... TV program “In Depth." The show interviews industry professionals about a large variety ... episode coming to the TV program will delve into the medical field. The ...
(Date:4/9/2020)... ... April 09, 2020 , ... Marking a new milestone in ... Online Bachelor of Science in Health Science degree program . The next start ... and apply via the CBD College website at cbd.edu. , CBD ...
(Date:4/9/2020)... ... April 09, 2020 , ... NeoTract, a wholly owned ... of urology, today announced that Brett Hill, D.O., The Urology Center PC of ... The designation recognizes that Dr. Hill has achieved a high level of training ...
Breaking Medicine Technology:
Cached News: