Near-infrared spectroscopy (NIRS) was used to assess human motor-cortex oxygenation changes in response to cyclic coupled movements of hand and foot. Using a highly sensitive NIRS instrument, we showed that it was possible to detect reproducible oxygenation patterns using single cycles (20 s) of easy and difficult association tasks. No significant differences in the time corresponding to the maximal changes in concentration of oxy- and deoxyhemoglobin ([O2Hb] and [HHb], respectively) were found during easy and difficult association as well as cycles. Only [O2Hb] showed a significantly higher value at the end of the difficult association during the first cycle. No significant differences were found for [O2Hb] and [HHb] in the other cycles. We conclude that NIRS is a useful addition to functional magnetic resonance imaging in investigating the time course of cortical activation.

Human motor-cortex oxygenation changes induced by cyclic coupled movements of hand and foot

QUARESIMA V.;FERRARI, Marco
1999-01-01

Abstract

Near-infrared spectroscopy (NIRS) was used to assess human motor-cortex oxygenation changes in response to cyclic coupled movements of hand and foot. Using a highly sensitive NIRS instrument, we showed that it was possible to detect reproducible oxygenation patterns using single cycles (20 s) of easy and difficult association tasks. No significant differences in the time corresponding to the maximal changes in concentration of oxy- and deoxyhemoglobin ([O2Hb] and [HHb], respectively) were found during easy and difficult association as well as cycles. Only [O2Hb] showed a significantly higher value at the end of the difficult association during the first cycle. No significant differences were found for [O2Hb] and [HHb] in the other cycles. We conclude that NIRS is a useful addition to functional magnetic resonance imaging in investigating the time course of cortical activation.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/7283
Citazioni
  • ???jsp.display-item.citation.pmc??? 16
  • Scopus 123
  • ???jsp.display-item.citation.isi??? 100
social impact