HOME >> BIOLOGY >> NEWS
Stimulating the brain makes the fingers more sensitive

Repetitive transcranial magnetic stimulation (rTMS) has emerged as an intriguing technique for exploring brain function, and a promising, though still unproven, form of therapy. This week, in the open-access journal PLoS Biology, Hubert Dinse and colleagues show that a short course of rTMS can increase finger sensitivity for up to two hours after treatment ends, and that this change corresponds to an increase in the size of the brain map representing the finger.

rTMS is applied with an electromagnetic coil in the shape of a figure-eight, placed on the scalp directly over the targeted portion of the brain. Short bursts of a strong magnetic pulse stimulate electrical currents within. Sensory input from each region of the body is represented on the surface of the brain, and the location of any region--in this case, the right index finger--can be mapped to allow precise targeting of the rTMS. The authors adjusted the strength of the magnetic field to just below that which triggered a sensory response in the finger, and then applied intermittent pulses of stimulation over the course of about ten minutes.

They tested the sensitivity of the index finger by determining how far apart two simultaneously applied pinpricks needed to be for the subject to distinguish them as separate stimuli. rTMS increased this two-point discrimination by about 15% immediately after stimulation, an effect that gradually diminished but still remained significant over the course of the next two hours. The effect was fairly specific for the right index finger: there was no effect on the left index finger, which is represented in the opposite hemisphere, and only a small effect on the right ring finger, which is represented several millimeters away from the index finger in the same hemisphere. When stimulation was applied over the area representing the lower leg, the index finger did not become more sensitive.

The authors used functional magnetic resonance imaging (fMR
'"/>

Contact: Paul Ocampo
press@plos.org
415-624-1224
Public Library of Science
17-Oct-2005


Page: 1 2

Related biology news :

1. Stimulating nerve cells with laser precision
2. Invasion of the brain tumors
3. Preclinical study links gene to brain aneurysm formation
4. Gene variant is associated with brain anatomy, clinical course of ADHD
5. Human knowledge is based upon directed connectivity between brain areas
6. A sensory organ, not the brain, differentiates male and female behavior in some mammals
7. Reading ability protects brain from lead exposure
8. Strength of connections between brain regions may affect an adolescents response to peer influence
9. Females more prone to brain damage from alcohol abuse
10. Prenatal alcohol exposure alters brain activity in the frontal-striatal areas
11. Drug protects brain cells in Huntingtons disease model, researchers find

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


(Date:6/19/2020)... ... June 18, 2020 , ... Join experts from Envigo ... in a live webinar on Wednesday, July 8, 2020 at 11am EDT ... we genetically engineer new models. However, while modifying the genome may be more straightforward, ...
(Date:6/11/2020)... ... June 09, 2020 , ... Superior Controls, Inc. ... automation and IT solutions for the life sciences industry, is pleased to announce the ... working out of the company’s Seabrook, New Hampshire office. In his new role, ...
(Date:6/5/2020)... ... ... Greffex, a pioneering vaccine and gene therapy company based in Houston, Texas, welcomes ... a global perspective to make an impact in a post pandemic world,” said Co-Chairman ... independent, director of the company. , “The Greffex board is excited to have Neil ...
Breaking Biology News(10 mins):
(Date:7/1/2020)... , ... June 29, 2020 , ... ... to date growth of 40% in 2020, despite many obstacles created as a ... aims to increase revenue for its partnered medical practices and medical manufacturers by ...
(Date:6/28/2020)... ... June 25, 2020 , ... The Indoor Lab, a leading provider of sensor ... of all types to ensure cleanliness, distancing and occupancy with its patent pending WipeAway™ ... enabled business will provide a health performance index system that scores all aspects of ...
(Date:6/28/2020)... ... June 26, 2020 , ... The Security Industry ... its strong opposition to the recently introduced bicameral Facial Recognition and Biometric ... most federal use of nearly all biometric and related image analytics technologies, incorrectly ...
(Date:6/23/2020)... ... 2020 , ... Regen Suppliers, the one stop shop for ... get the fourth unit free with no limit on the amniotic derived exosomes. ... have been a game changer for regenerative therapies. The products are manufactured at ...
Breaking Biology Technology:
Cached News: