HOME >> MEDICINE >> NEWS
Classic illusion sheds new light on the neural site of tactile perception

As much as neuroscientists know about the neural processes that signal touch, surprisingly little is understood about the neural correlates of conscious perception of tactile sensations. In a new study in the open-access journal PLoS Biology, Felix Blankenburg, Jon Driver, and their colleagues turn to a classic somatosensory illusion--called the cutaneous rabbit--that is perfectly suited to decoupling real and illusory touch. In the illusion, a rapid succession of taps is delivered first to the wrist and then to the elbow, which creates the sensation of intervening taps hopping up the arm (hence the illusion's name), even when no physical stimulus is applied at intervening sites on the arm.

Blankenburg et al. took advantage of this somatosensory illusion to investigate which brain regions play a role in illusory tactile perceptions. Previous studies had implicated the somatosensory cortex--the region of the cortex that first receives input from sensors in the body--in the rabbit illusion, but did not directly test this possibility. To do this, the authors used state-of-the-art functional magnetic resonance imaging technology (called 3T fMRI) to scan the brains of people experiencing the illusion. With the enhanced image quality and resolution of this scanner (deriving from the stronger magnetic field plus a specially customized imaging sequence), the authors show that the same brain sector is activated whether the tactile sensation is illusory or real.

To identify brain-related activity associated with real and illusory perceptions, the researchers taped three electrodes to the inner side of participants' left forearms, one just above the wrist, the others spaced equidistantly toward the elbow. Electrical stimulation could be applied to these points while participants lay in the scanner. For the genuine rabbit experience, each point received three pulses in succession. For the illusion, pulses were only delivered to the first and third points, bu
'"/>

Contact: Paul Ocampo
press@plos.org
415-624-1224
Public Library of Science
27-Feb-2006


Page: 1 2

Related medicine news :

1. Wired for sound: How the brain senses visual illusions
2. Link between income and happiness is mainly an illusion
3. Schizophrenia: Delusion without illusion
4. New book explains age-old mystery of geometrical illusions
5. Hollow-face illusion affects estimates of distance and reaching tasks
6. Study sheds light on medication treatment options for bipolar disorder
7. New research sheds light on stroke development
8. Imaging technique sheds new light on the composition of the brain of moderate cannabis users
9. Lizard third eye sheds light on evolution of color vision
10. Protein sorting in pigment cells sheds light on melanoma, Alzheimers disease
11. Shift in feeding behavior of mosquitoes sheds light on West Nile virus outbreaks

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


(Date:1/14/2019)... ... January 14, 2019 , ... Modere (the “Company”), ... with a presence worldwide, today announced that it built on 2017’s growth momentum, ... grew by double-digits in North America, by more than five times in Europe ...
(Date:1/14/2019)... ... January 14, 2019 , ... The ... availability of VARIZIG® (Varicella Zoster Immune Globulin [Human]) for post-exposure prophylaxis of ... the update, the CDC notes that VARIZIG is commercially available from a broad ...
(Date:1/14/2019)... ... 2019 , ... Dr. Kaveh Kanani D.D.S . is the head of Around the Corner ... general dentist has recently unveiled an inventive method of inserting dental implants. , ... is missing for an extended period of time, the jawbone that used to hold the ...
(Date:1/13/2019)... ... January 12, 2019 , ... On December 13th, The Pennsylvania ... hosted a continuing education (CEU) event entitled, Can You Hear Me Now? Creating ... a series of talks to help develop and cultivate the relationship between mentors ...
(Date:1/11/2019)... ... 11, 2019 , ... In Partnership with the Smiles for Everyone Foundation ... at its Burleson, TX office on February 9. , Dental services provided ... and extractions . For more information, please visit the Monarch Dental website ...
Breaking Medicine News(10 mins):
(Date:1/10/2019)... (PRWEB) , ... January 10, 2019 , ... ... wellness company providing nutrition and lifestyle solutions, will crown the U.S. winner of ... Period’s 15 finalists include: Andrea Carrara of Palm Beach, Florida; Barbara Lingle of ...
(Date:1/8/2019)... , ... January 08, 2019 , ... ... been designated as a UroLift® Center of Excellence. The designation recognizes that Dr. ... System and demonstrated a commitment to exemplary care for men suffering from symptoms ...
(Date:1/8/2019)... ... January 08, 2019 , ... Date aired: August 13th, 2018 , Guest: ... excessive evaporation of the tear film, which is naturally 99 percent water, and it ... says water researcher Sharon Kleyne, host of the internationally syndicated radio program, The Sharon ...
Breaking Medicine Technology:
Cached News: