HOME >> MEDICINE >> NEWS
There's more than meets the eye in judging the size of an object

Neuroscientists from the University of Washington and the University of Minnesota have found that the first area in the cortex of the human brain that receives information from the eyes processes the perceived size, rather than the actual size, of an object.

"Our eyes only tell us part of what we need to be able to see. The other part is done by the brain, taking the input from the eyes and making guesses or inferences about what's out there in the enviro You can't always trust your eyes. nment. Usually these inferences are very accurate, but sometimes they lead us astray in the form of visual illusions," said Scott Murray, a UW assistant psychology professor and lead author of a study published in the current issue of Nature Neuroscience.

Murray and his Minnesota colleagues, Huseyin Boyaci and Daniel Kersten, used functional magnetic resonance imaging (fMRI) to see how the brain processes the size of objects when faced with an illusion such as the long-known moon illusion. For centuries it has been known that the moon, while rising, looks huge when it is near the horizon and smaller when high in the sky. It is in reality always the same size.

The researchers used a similar illusion, one that looked at the perceived difference in the size of an object at different distances. For their experiment they placed two identical spheres decorated with a checkerboard pattern in the front and rear of a receding brick hallway. In this kind of illusion, the more distant object appears to occupy a larger portion of the visual field.

Using fMRI, the researchers examined how the brains of five people with normal vision registered this difference in perceived size.

They found that the brain region known as the primary visual cortex, which is the first area in the cortex to receive input from the retina, showed a difference. Even though both spheres occupied exactly the same size on the retina, the rear sphere activated an approximat
'"/>

Contact: Joel Schwarz
joels@u.washington.edu
206-543-2580
University of Washington
8-Mar-2006


Page: 1 2

Related medicine news :

1. Theres no modern substitute for some old-fashioned one-on-one
2. Theres more than meets the eye to catching a fly ball in the outfield
3. Fluoridated beverage consumption and dental fluorosis: Theres a connection
4. Stroke drug still meets resistance from doctors wary of its risks
5. New objective criteria improve PET scan reliability in detecting breast cancer metastasis
6. Educating health care professionals to prescribe drugs objectively
7. Reducing oral health disparities: Achieving healthy people 2010 objectives
8. Conscientious objection in medicine should not be tolerated

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


(Date:2/17/2017)... Verdes, CA (PRWEB) , ... February 17, 2017 ... ... emotional flow is Dr. Carol Francis' goals for each and every ... Conference, Dr. Carol Francis will demonstrate five different brainwave tools which help energize ...
(Date:2/17/2017)... ... February 17, 2017 , ... Qualis Health, one ... in the 8th Annual DecisionHealth Platinum Awards in recognition of its innovative healthcare ... is recognized across multiple award categories, highlighting four of the organization’s current programs:, ...
(Date:2/17/2017)... (PRWEB) , ... February 17, 2017 , ... ... by fall 2017 season , Trinity Health and the U.S. Soccer Foundation announced ... Success program in underserved communities. Soccer for Success, the Foundation’s soccer mentoring program, ...
(Date:2/17/2017)... ... February 17, 2017 , ... Pharmica ... focusing on all facets of clinical trial planning and management. Pharmica discussed the ... and more. In addition, attendees stopping by Pharmica’s booth were able to demo ...
(Date:2/17/2017)... ... February 17, 2017 , ... ... exhibitor at Molecular Medicine Tri-Conference February 20 – 22 in San Francisco. As ... showcase its anatomic and molecular pathology workflow solution, as well as its new ...
Breaking Medicine News(10 mins):
(Date:2/16/2017)... SCOTTSDALE, Ariz. , Feb. 16, 2017 HealthInfoNet ... announced today it is partnering with Orion Health on the ... of all Maine residents, clinical information ... hospitals and over 500 ambulatory care sites. Pending ... deploy Orion Health,s Amadeus , a precision medicine platform ...
(Date:2/16/2017)...   Spectralink Corporation , the global leader ... manufacturing and hospitality industries, today announced the results ... support features of its PIVOT™:SC (8744) ... study, conducted by The Tolly Group, showed quantifiable ... with dedicated hardware scanners. Spectralink introduced ...
(Date:2/16/2017)... TEL AVIV, Israel , Feb. 16, 2017 ... company, today announced the appointment of Harvey ... and Chief Executive Officer of ARIAD Pharmaceuticals, Inc., ... of Medinol US Inc., effective immediately.  Dr. Berger, ... areas of business development, global strategy, new business ...
Breaking Medicine Technology:
Cached News: