What part of the brain controls all voluntary activities and receives sensory input?

The cerebrum is the part of the brain that is responsible for controlling all voluntary activities and processing sensory information. It is the largest region of the brain and is divided into two hemispheres, which are further divided into lobes that are specialized for different functions.

The cerebrum enables complex functions such as reasoning, problem-solving, and emotional responses, in addition to managing voluntary motor control. It receives sensory input from various parts of the body and integrates this information, allowing individuals to respond appropriately to their environment. This integration is crucial for actions like moving limbs or interpreting sensory data, such as sight and sound.

The other parts mentioned have different roles. The cerebellum primarily coordinates balance and fine motor skills but does not control voluntary activities directly. The hypothalamus regulates automatic body processes such as temperature and hormonal balance, while the medulla controls autonomic functions like heart rate and breathing but does not handle voluntary movements or sensory input.