The brain is not a muscle. While it does contain some muscle, it is primarily made of gray and white matter. The brain is a pale gray color and about the size of a small cauliflower. It has the texture of pate.
The brain is divided into four areas, which are known as the cerebrum, diencephalon, cerebellum and brain stem. Each area is responsible for different aspects of an individual’s personality and capabilities. The largest part of the brain is the cerebrum, which is found at the top of the brain. Its front part, or frontal lobe, is responsible for thought, emotion, speech and skilled movements.
The brain is a complex organ that forms the core of the central nervous system. It is composed of two main types of cell: neurons and glial cells. Glial cells make up the scaffolding that holds the brain in shape, provide metabolic support for the energy-hungry organ's minute-by-minute operation and insulate its structures from unexpected shocks and other damage.
Neurons are what make the brain unlike any other organ in the body. The brain thinks, feels, perceives and acts through the electrochemical interactions of the neurons. These cells convert electrical impulses from the body into chemical exchanges along complex pathways inside the brain. They then send impulses back down to the body to control its actions. In this way, the brain controls the body's muscles without being one itself. Destruction of brain tissue can reduce or eliminate the ability to control certain muscles in the body.