Activity of right premotor-parietal regions dependent upon imagined force level: An fMRI study

Nobuaki Mizuguchi, Hiroki Nakata, Kazuyuki Kanosue

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this study, we utilized functional magnetic resonance imaging (fMRI) to measure blood oxygenation level-dependent (BOLD) signals. This allowed us to evaluate the relationship between brain activity and imagined force level. Subjects performed motor imagery of repetitive right hand grasping with three different levels of contractile force; 10%, 30%, and 60% of their maximum voluntary contraction (MVC). We observed a common activation among each condition in the following brain regions; the dorsolateral prefrontal cortex (DLPFC), ventrolateral prefrontal cortex (VLPFC), supplementary motor area (SMA), premotor area (PM), insula, and inferior parietal lobule (IPL). In addition, the BOLD signal changes were significantly larger at 60% MVC than at 10% MVC in the right PM, the right IPL, and the primary somatosensory cortex (SI). These findings indicate that during motor imagery right fronto-parietal activity increases as the imagined contractile force level is intensified. The present finding that the right brain activity during motor imagery is clearly altered depending on the imagined force level suggests that it may be possible to decode intended force level during the motor imagery of patients or healthy subjects.

Original languageEnglish
Article number810
JournalFrontiers in Human Neuroscience
Volume8
Issue numberOCT
DOIs
Publication statusPublished - 2014 Oct 8

Fingerprint

Parietal Lobe
Imagery (Psychotherapy)
Motor Cortex
Magnetic Resonance Imaging
Prefrontal Cortex
Brain
Somatosensory Cortex
Healthy Volunteers
Motor Activity
Hand

Keywords

  • Grasp
  • Motor imagery
  • Parietal cortex
  • Premotor cortex

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Neurology
  • Biological Psychiatry
  • Behavioral Neuroscience
  • Neuropsychology and Physiological Psychology

Cite this

Activity of right premotor-parietal regions dependent upon imagined force level : An fMRI study. / Mizuguchi, Nobuaki; Nakata, Hiroki; Kanosue, Kazuyuki.

In: Frontiers in Human Neuroscience, Vol. 8, No. OCT, 810, 08.10.2014.

Research output: Contribution to journalArticle

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