Final answer:
Walking depends on fixed action patterns and coordination of the cerebellum and basal ganglia. These brain regions manage complex motor behaviors, contributing to learned movements and posture necessary for activities like walking.
Step-by-step explanation:
Complex motor behavior such as walking depends on fixed action patterns and the coordination of various neural processes. Motor development typically progresses in an orderly sequence where infants first learn basic motor functions like holding their heads up, eventually advancing to more complex actions like crawling and walking. The cerebellum and basal ganglia are critical for coordinating movement and posture. These brain regions manage learned movements and responses to stimuli, exhibiting complex patterns of behavior essential for regular activities like driving or walking.
For example, the three-spined stickleback fish displays an aggressive fixed action pattern during the breeding season. This is an instinctual response to stimuli, illustrating how certain stimuli can trigger a complex series of behaviors that continue even after the stimulus is no longer present. Similarly, human motor behaviors, such as walking, involve learned movements and the cerebellum's comparison of voluntary movement, demonstrating the coordination necessary between different parts of the nervous system.