Scientists used a stimulation technique to improve the sensitivity of peoples fingertips, and then gave them drugs that either doubled or deleted this effect. Similar skin stimulation/drug treatment combinations may eventually help the elderly or stroke victims button shirts and aid professional pianists according to the authors of a paper appearing in the 04 July issue of the journal Science, published by AAAS, the science society.
Finger stimulations and drugs can temporarily reorganize parts of the human brain. This stimulation, called co-activation, shuffles the synapses that link neurons. The stimulated area becomes more sensitive as more neurons are recruited to process encountered tactile information. The scientists showed that amphetamine doubled stimulation-induced gains in tactile acuity. In the presence of an alternate drug, an NMDA blocker, the improvements in tactile acuity, or perceptual learning, gained via finger stimulations were lost.
Dinse said that related treatments could improve a persons ability to read Braille and that drug-mediated muscle stimulation could help the elderly and chronic pain patients perform everyday tasks.
Daniel Kane | EurekAlert!
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