Brain activity during visual versus kinesthetic imagery: an fMRI study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Motor Control

Background:

• Motor imagery activates brain regions similar to actual movements.
• The distinct neural networks for visual imagery (VI) and kinesthetic imagery (KI) remain unclear.

Purpose of the Study:

• To identify the cerebral structures involved in VI and KI using functional magnetic resonance imaging (fMRI).
• To compare brain activation patterns between VI and KI in skilled imagers.

Main Methods:

• fMRI at 3.0 Tesla in 13 skilled imagers.
• Participants performed physical execution, VI, and KI of finger movements, alongside a perceptual control condition.
• Imagery abilities assessed using psychological, chronometric, and physiological measures.

Main Results:

• Physical execution, VI, and KI showed overlapping brain activations in motor-related regions and parietal lobules compared to the control condition.
• Direct comparison revealed distinct patterns: VI predominantly activated occipital and superior parietal regions.
• KI showed more activity in motor-associated structures and the inferior parietal lobule.

Conclusions:

• VI and KI are mediated by separate neural systems.
• These distinct systems contribute differently to motor learning and neurological rehabilitation.