Distal-to-proximal representation of volar index finger in human area 3b |
| |
Authors: | Hlushchuk Yevhen Forss Nina Hari Riitta |
| |
Affiliation: | Brain Research Unit of Low Temperature Laboratory, Helsinki University of Technology, Finland. yevhen@neuro.hut.fi |
| |
Abstract: | In area 3b of the monkey primary somatosensory cortex SI, the proximal phalanges of the fingers are represented close to the surface and the fingertips in the depth of the central sulcus. To study whether a similar arrangement might exist in humans, we applied tactile stimuli to the distal and proximal phalanges of the index finger in 11 healthy adults. Cortical somatosensory evoked fields were recorded with a whole-scalp neuromagnetometer. The sources of the responses were situated in the posterior wall of the central sulcus, statistically significantly more superior to proximal than distal stimuli, with a mean difference of 3.1 mm. Thus the distal-to-proximal representation of the index finger shows a similar order in human and monkey SI cortex. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|