Number-action coupling across the lifespan: Sensorimotor foundations of numerical cognition

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Motor Control

Background:

• Numerical cognition and action systems, particularly hand motor control, show intricate interactions.
• The strength and nature of this number-action coupling vary across tasks, developmental stages, and cultural contexts.

Purpose of the Study:

• To review evidence on the emergence and development of number-action coupling.
• To examine the influence of education and culture on this relationship.
• To understand how aging affects number-action interactions and their neural underpinnings.
• To explore what these interactions reveal about shared cognitive and sensorimotor mechanisms.

Main Methods:

• Narrative review synthesizing behavioral, developmental, comparative, and neurophysiological evidence.
• Analysis of studies across infancy, childhood, adulthood, and older age.
• Examination of neuroimaging findings related to number-action overlap.

Main Results:

• Number-action mappings are present from infancy, supported by overlapping parietal-frontal networks.
• Motor experience, finger gnosis, and fine motor skills scaffold numerical development.
• Cultural practices like finger-counting influence numerical representations.
• A robust bidirectional influence between numerical magnitude and action is observed in adulthood, supported by shared fronto-parietal substrates.
• Number-action overlap is preserved in older age through compensatory neural recruitment, despite motor decline.

Conclusions:

• Action systems play a crucial role in scaffolding and modulating numerical cognition across the lifespan.
• Number-action coupling is a fundamental aspect of cognitive organization, refined by experience and culture.
• Embodied interventions show potential for supporting numerical cognition in aging populations.