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A Within-subjects Experimental Protocol to Assess the Effects of Social Input on Infant EEG
Published on: May 3, 2017
Selective prefrontal cortex responses to joint attention in early infancy
Tobias Grossmann1, Mark H Johnson
1Centre for Brain and Cognitive Development, Birkbeck, University of London, London, UK. t.grossmann@bbk.ac.uk
Biology Letters
|January 29, 2010
Summary
Five-month-old infants engage in joint attention, sharing focus with others. Their brains show activity in the left dorsal prefrontal cortex, indicating early neurobiological preparation for social interaction and learning.
Area of Science:
- Developmental Neuroscience
- Cognitive Neuroscience
- Infant Social Cognition
Background:
- Joint attention, the shared focus on an object or event, is crucial for human social development, language, and cooperation.
- While the behavioral significance of joint attention in infants is recognized, its neural underpinnings in early development remain largely unexplored.
- Understanding the infant brain's response to social interactions is key to deciphering the origins of uniquely human abilities.
Purpose of the Study:
- To investigate the neural correlates of joint attention in five-month-old infants.
- To examine prefrontal cortex activity during triadic social interactions in infants.
- To determine if infants recruit specific brain regions similar to adults during joint attention.
Main Methods:
- Utilized near-infrared spectroscopy (NIRS) to measure brain activity in five-month-old infants.
- Observed neural responses during controlled triadic social interactions involving an infant, an experimenter, and an object.
- Focused on activity within the prefrontal cortex during periods of shared attention.
Main Results:
- Five-month-old infants demonstrated sensitivity to triadic social interactions.
- Infants showed significant activation in the left dorsal prefrontal cortex when engaged in joint attention.
- This pattern of brain activation mirrors that observed in adults during similar joint attention tasks.
Conclusions:
- The infant brain, even at five months, is neurobiologically equipped for shared attention.
- Early recruitment of the left dorsal prefrontal cortex suggests a foundational neural basis for human social learning.
- These findings support the hypothesis that infants are inherently prepared for social and cultural learning processes.
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