Walking center. Walking is a "simple" activity. Under normal circumstances, walking does not require the involvement of the cerebral cortex. Some animals can still crawl after the brain is removed, suggesting that the spinal cord has a crawling or "walking" center. However, human walking is closely related to the function of the cerebral cortex. In complex situations and special tasks, the cerebral cortex is directly involved in walking posture control. Fukuyama et al. used PET research and found that the cerebral cortex energy metabolism activity increased during walking, suggesting that the cerebral cortex is involved in walking activities. When the brain is dysfunctional, the role of the subcortex and spinal cord is released or strengthened, leading to abnormal compensatory activities. Direct impairment of cerebral cortex, brainstem, cerebellum, and spinal cord function or conduction pathway obstacles can lead to different types of walking dysfunction. The internal regulation mechanism is so complicated that the academic community has not been able to determine the location and function of the human walking center.