HOME >> MEDICINE >> NEWS
Do stroke therapies really work?

THERAPIES that aim to rehabilitate stroke patients may be backfiring. Instead of helping people recover lost speech or movement, they could be making the problems worse.

That's the conclusion of researchers who found that people who have had strokes were better able to recall words after they silenced parts of the brain that therapies stimulate.

Stroke is caused when a clot forms or a blood vessel ruptures in the brain, cutting off the blood supply and killing neurons within minutes. Although the dead cells are not replaced, people can still recover lost functions such as the ability to recall words. The prevailing explanation is that healthy regions on one side of the brain learn to take over the jobs that were done by the corresponding cells that died in the other hemisphere. This idea is supported by studies using functional magnetic resonance imaging that have revealed increased electrical activity in regions in the intact hemisphere compared with the same area in healthy brains.

Many therapies are designed to boost this reorganisation by stimulating the intact hemisphere. For instance, speech-impaired patients are often encouraged to sing a song containing the word they are seeking. The hope is that embedding it in a heavily prosodic, or tonal, context will engage the right hemisphere-which processes prosody -and bypass the damaged left hemisphere that normally processes speech. In this way, stroke patients learn to recall a stored word by a different route.

Yet despite therapy, many patients fail to recover some lost functions. This suggests that overstimulating the healthy regions of the brain may be stifling recovery rather than aiding it, says Alvaro Pascual-Leone, director of the Laboratory for Magnetic Brain Stimulation at Harvard Medical School in Boston.

His team tested the theory by using magnetic fields to suppress those areas instead. Using a technique called transcranial magnetic stimulation, the researc
'"/>

Contact: Claire Bowles
claire.bowles@rbi.co.uk
44-207-331-2751
New Scientist
19-Jun-2002


Page: 1 2

Related medicine news :

1. Obesity among African-American stroke survivors increases risk factors for recurrent stroke
2. Neurobehavioral function during coma, stroke rehabilitation effective for elderly
3. Blood pressure treatment could cut risk of strokes and heart attacks
4. Mayo Clinic develops first genomic-based test to predict stroke from ruptured brain aneurysm
5. Folic acid and vitamin B12 decrease risk of hip fracture in stroke patients
6. Columbia study finds hemophilia therapy dramatically improves outcomes for bleeding stroke
7. New device will help stroke victims recovery
8. Regular cannabis may increase risk of stroke in young users
9. Viagra used in stroke recovery study
10. COX-2 product offers good and bad news in test tube strokes
11. Mount Sinai stroke prevention trial published in JAMA

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


(Date:7/23/2019)... , ... July 23, 2019 , ... Jason Patton, Florida-based Firefighter, Fire Dept. Coffee Vice ... to climb 110 flights of stairs for the San Antonio 110 9/11 Memorial Climb ... memorial to the 343 fallen firefighters who lost their lives in the line of duty ...
(Date:7/19/2019)... Pa. (PRWEB) , ... July 19, 2019 , ... ... medical education, announces the hiring of Megan Clem as Senior Director of Education ... device, and education sectors. , “Having worked globally with physician experts on comprehensive ...
(Date:7/18/2019)... ... July 18, 2019 , ... LEAD Hospitality Group is preparing to ... Epilepsy Foundation of Georgia. The event is scheduled to take place August 17, 2019 ... Concourse Parkway, right under the King & Queen Buildings. LEAD Hospitality Group will be ...
(Date:7/18/2019)... ... July 18, 2019 , ... Gateway Genomics , ... announces a new publication titled, “ Accurate Fetal Sex Determination from Maternal Blood at ... the study, DNA blood samples were collected from 108 women at an average gestational ...
(Date:7/17/2019)... ... 17, 2019 , ... The Blackboard Catalyst Award in Teaching ... The honor is given to distance learning courses and programs that help set ... institutions from around the world that produce exemplary educational and training opportunities. Winners ...
Breaking Medicine News(10 mins):
(Date:7/23/2019)... ... July 23, 2019 , ... Everest ... hospital in the ever-growing Liberty Township (N. Cincinnati), Ohio region. , Everest’s modern ... Cincinnati, Ohio. The hospital site is located at the northeast corner of Interstate ...
(Date:7/23/2019)... , ... July 23, 2019 , ... Miriam “Mimi” Boublik ... nonprofit ending homelessness at its roots in New York City. , Boublik has ... Columbia Business School, she founded the Jericho Associate Board (now the Young Professionals Council) ...
(Date:7/19/2019)... ... July 19, 2019 , ... The new studies will ... non-invasive transdermal (over-the-skin) technology, which is the leader in the field of microcirculation ... evidence obtained by Circularity over the past six years. The clinical work has ...
Breaking Medicine Technology:
Cached News: