Final answer:
The sensory cortex develops before the motor cortex in the CNS during the first two years of life, as it's necessary for infants to process sensory information prior to executing motor functions.
Step-by-step explanation:
The correct statement regarding the development of the CNS in the first two years of life is that the sensory cortex develops before the motor cortex. This sequence is integral for the infant to first receive and process sensory information, which then guides the development of motor control.
As the spinal cord develops, the dorsal tissues associated with sensory functions and the ventral tissues associated with motor functions must first acquire the ability to process sensory input before they can properly coordinate and execute motor outputs.
This is foundational for motor development in infants, which progresses from simple reflexive reactions to more complex motor functions like crawling and walking. Motor development happens in a sequential manner, built upon the sensory experiences that infants encounter and integrate.
The neurological development is structured such that sensory input informs and refines motor output through the brain's ability to process sensory information in regions like the sensory cortex and relay this to the motor cortex for action. The spinal cord, while simpler than the brain in structure, has important functions in coordinating sensory and motor pathways early in life.