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Interaction of finger representation in the human first somatosensory cortex: a neuromagnetic study
| Content Provider | Semantic Scholar |
|---|---|
| Author | Biermann, Katja Schmitz, Frank Witte, Otto W. Konczak, Jürgen Schnitzler, Alfons |
| Copyright Year | 1998 |
| Abstract | Neuromagnetic responses to separate tactile stimulation of digits I, II and V and simultaneous stimulation of digit pairs II and I, and II and V, were recorded in six healthy adult subjects using a 122-channel whole-head neuromagnetometer in order to investigate functional overlap of finger representations in primary somatosensory cortex (SI). Evoked responses to single digit stimulation were explained by time-varying equivalent current dipoles (ECDs) located in SI. These ECDs were then used to explain responses to stimulation of digit pairs. A cortical interaction ratio (IR) was defined as the vector sum of peak source amplitudes to separate stimulations of two fingers divided by the vector sum of source amplitudes to simultaneous stimulation of the two digits. Mean IR was significantly higher (P<0.05; Wilcoxon test) for digit pair II + I (1.69+/- 0.15) compared to digit pair II + V (1.14+/- 0.12). These results indicate that there is an overlap of finger representations in human SI which differs between anatomically adjacent and non-adjacent digit pairs. |
| Starting Page | 13 |
| Ending Page | 16 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| PubMed reference number | 9714453 |
| Journal | Medline |
| Volume Number | 251 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/S0304394098004807 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/S0304394098004807?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/S0304-3940%2898%2900480-7 |
| Journal | Neuroscience Letters |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
