What aspect of motor development does 'accretion' refer to?

Accretion refers to the process of growth through the addition of new cells or materials. In the context of motor development, this concept pertains particularly to how tissues, including muscles and neurons, grow by accumulating new cellular components. This process is essential for normal growth and maturation, as it allows for the expansion of both the muscular and nervous systems, contributing to enhanced motor abilities as an individual develops.

In motor development, understanding accretion helps clarify how physical growth and maturation occur, particularly in infants and children as they transition from basic reflexive movements to more complex motor skills. The addition of new cells improves capabilities, leading to advancements in coordination, strength, and overall movement efficiency as a child grows.