Final answer:
The two major sensorimotor association cortex areas are the premotor cortex, which is involved in controlling core muscles for posture, and the supplemental motor area (SMA), which is responsible for planning and coordinating movements.
Step-by-step explanation:
The two major areas of sensorimotor association cortex are the premotor cortex and the supplemental motor area (SMA). The premotor cortex is significant for controlling the core muscles to maintain posture during movement. On the other hand, the supplemental motor area plays a critical role in planning and coordinating movements, particularly managing learned sequential movements. These regions are highly active leading up to the initiation of movement, preparing the body for actions like managing the movements necessary to drive.
Another essential integrative area is the posterior parietal cortex, which coordinates visual and motor functions, such as reaching out a hand to pick up an object. This area integrates proprioceptive feedback from the movement of the limbs with visual cues to accurately guide actions. Together, these areas exemplify the complex integration of sensory and motor information that is crucial for conducting smooth and coordinated actions in response to our environment.