Processing of self-related kinematic information embedded in static handwritten characters

Area of Science:

• Cognitive Neuroscience
• Psychology

Background:

• Handwritten character perception and generation are linked to motor actions.
• The neural basis for processing self-related kinematic information in static handwriting is not fully understood.

Purpose of the Study:

• To investigate the temporal dynamics of neural activation when processing self-related kinematic information in handwritten characters.
• To determine how the brain distinguishes between self- and non-self-generated handwriting.

Main Methods:

• Event-related potential (ERP) recording was used while participants judged character origin.
• Two experiments manipulated character styles and familiarity to assess self-related kinematic effects.

Main Results:

• Distinct brain activation differences were observed for self- versus non-self-written characters.
• These differences were evident in the P250 component (right posterior regions) and the late positive component (LPC; anterior midline regions).
• Activation patterns persisted even with unfamiliar or altered character styles.

Conclusions:

• Self-information in handwriting engages right-lateralized brain regions associated with bodily self-processing.
• Anterior midline brain regions involved in self-referential processing are also activated.
• These findings elucidate the neural mechanisms underlying the perception of self-generated handwriting.