Infant brain responses to felt and observed touch of hands and feet: an MEG study

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• The developing human brain's representation of the body is crucial for self-awareness and social interaction.
• Early understanding of self and others forms the foundation for complex social cognition.

Purpose of the Study:

• To investigate how infants' brains represent their own bodies and the bodies of others.
• To explore the neural underpinnings of self-other body representations in early development.

Main Methods:

• Utilized infant magnetoencephalography (MEG) brain imaging in two experiments with 7-month-old infants.
• Experiment 1: Assessed brain responses to tactile stimulation (touch) on the infant's own hand and foot.
• Experiment 2: Examined brain responses to observing another person's hand or foot being touched.

Main Results:

• Tactile stimulation activated specific somatosensory cortex areas in infants.
• Observing touch activated visual and multisensory processing regions, including the infant's own somatosensory cortex.
• Neural activation suggested a mapping between self and other body representations.

Conclusions:

• Infants possess early neural mechanisms for mapping self and other body representations.
• These findings provide insights into the development of social cognition, including imitation and empathy.
• The study highlights the role of somatosensory and visual-multisensory integration in early self-other processing.