Dynamic reorganization of referred sensations by movements of phantom limbs.

Abstract:

:After amputation of an arm the sensory map of the body changes radically, causing the sensory input from face to 'invade' the original hand area in the brain. As a result, touching the face of the amputee evokes tactile sensations on the phantom. These sensory referrals from the face to phantom hand occur in a stable, topographically organized manner. We now find that volitional movements of the phantom cause striking, systematic shifts in the map along the direction of movement. We conclude that the reorganization of maps is based partly on reversible inhibition of ordinarily silent synapses, not entirely on new anatomical connections. This finding further highlights the dynamic nature of the brain on remarkably short-time scales.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Ramachandran VS,Brang D,McGeoch PD

doi

10.1097/WNR.0b013e32833be9ab

subject

Has Abstract

pub_date

2010-07-14 00:00:00

pages

727-30

issue

10

eissn

0959-4965

issn

1473-558X

journal_volume

21

pub_type

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