Final answer:
The output of the posterior parietal cortex mainly influences the frontal lobe, particularly areas involved in planning and executing movements, as well as higher cognitive functions related to goal-directed behaviors.
Step-by-step explanation:
Much of the output of the posterior parietal cortex is directed towards the frontal lobe of the brain, which is responsible for motor functions. The posterior parietal cortex lies between the somatosensory cortex and the visual cortex regions, and it plays a critical role in the coordination of visual and motor functions. Integration with the somatosensory cortex in the parietal lobe and the dorsal visual stream allows the posterior parietal cortex to influence activity in the frontal lobe, specifically areas related to movement planning and execution, such as the prefrontal cortex, premotor cortex, and supplemental motor area. These areas of the frontal lobe are instrumental in generating movements of the body in response to visual inputs and are associated with higher cognitive functions, like working memory and attention that are essential for achieving goal-directed behaviors.