Separate finger representations at the human second somatosensory cortex

R. Hari*, H. Hämäläinen, Matti Hämäläinen, J. Kekoni, M. Sams, J. Tiihonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

123 Citations (Scopus)

Abstract

We recorded neuromagnetic responses of the second somatosensory cortex in healthy humans. Cutaneous electrical stimulation of fingers elicited a response around 100 ms. with a field pattern agreeing with activation of the second somatosensory cortex in the upper bank of the Sylvian fissure. In an oddball paradigm, with standards presented to the thumb and deviants (10%) to the middle finger, or vice versa, the second somatosensory cortex responses to deviants were almost three times as high in amplitude as those to standards. A similar amplitude enhancement was obtained when the deviants were presented in the absence of the intervening standards but with the same interstimulus interval. The results indicate that an accurate functional representation of different body areas is maintained at the human second somatosensory cortex.

Original languageEnglish
Pages (from-to)245-249
Number of pages5
JournalNeuroscience
Volume37
Issue number1
DOIs
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed

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