Relationship between intensity of toe motion and cerebral activation: A near-infrared spectroscopy study

Masahiro Ishizaka, Kotaro Takeda, Toshinori Shimoi, Hitoshi Maruyama

Research output: Contribution to journalArticle


[Purpose] We investigated the relationship between the intensity of toe motion and Δ[Oxy-Hb] in motor cortical areas. [Subjects] Twelve healthy adults (7 females and 5 males: 26.9±5.3 years of age) participated in the study. [Methods] The motor tasks were isometric and isotonic right toe flexion. The participants performed the tasks under two conditions: maximum and moderate effort. We measured the motor cortical activity using NIRS, and the extent and amplitude of the activations were compared between the two conditions for each task. [Results] In the isotonic flexion task, the extent of the activation area and the amplitude of Δ[Oxy-Hb] were dependent on the movement intensity. On the other hand, there was no significant difference between the two conditions in the isometric flexion task. [Conclusion] We clarified that cerebral activation is influenced by the task motion and the participant's effort.

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalRigakuryoho Kagaku
Issue number2
Publication statusPublished - 06-2012
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physical Therapy, Sports Therapy and Rehabilitation

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