Brain

The brain, along with the spinal cord, comprises the body's central nervous system. This is the major control network for the body's functions and abilities, and enables conscious communication with our body and automatic operation of vital org...  Read More
Of Interest
Written and medically reviewed by the Healthline Editorial Team
Co-developed by:

In Depth: Brain

Much of the brain's physiological task involves receiving information from the rest of the body, interpreting that information, and then guiding the body's response to it. Types of input the brain interprets include odors, light, sounds, and pain. The brain also helps perform vital operations such as breathing, maintaining blood pressure, and releasing hormones (chemical signals that control certain cells and organs).

The brain is divided into sections. These sections include the cerebrum, the cerebellum, the diencephalon, and the brainstem.  

Each of these parts is responsible for certain portions of the brain's overall job. The larger parts are, in turn, divided into smaller areas that handle smaller portions of the work. Different areas often share responsibility for the same task.

The cerebrum is the largest part of the brain. It is responsible for memory, speech, the senses, emotional response, and more. It is divided into several sections called lobes. These lobes are referred to as the frontal, temporal, parietal, and occipital; each handles a specific segment of the cerebrum's jobs.

The cerebellum is below and behind the cerebrum and is attached to the brain stem. It controls motor function, the body's ability to balance, and its ability to interpret information sent to the brain by the eyes, ears, and other sensory organs.

The functions the brain stem governs include respiration, blood pressure, some reflexes, and the changes that happen in the body during what is called the “fight or flight” response. The brain stem is also divided into several distinct sections: the midbrain, pons, and medulla oblongata.

The diencephalon is inside the cerebrum above the brain stem. Its tasks include sensory function, food intake control, and the body's sleep cycle. As with the other parts of the brain, it is divided into sections. These include the thalamus, hypothalamus, and epithalamus.

The brain is protected from damage by several layers of defenses. Outermost are the bones of the skull. Beneath the skull are the meninges, a series of sturdy membranes that surround the brain and spinal cord. Inside the meninges, the brain is cushioned by fluid.

Still, the brain can suffer damage, become diseased, or malfunction. These problems may include cancer, physical injuries such as skull fractures, and ruptures of blood vessels that supply the brain.

Debugging Tools

Level: 1
Frame: 1
Toggle Hotspot
VP Data Tool
HexTable json from Steve
Steve's ajax layer update call:
[still on original layer]

Ad values:

adModel.dfpAdSite: hn.us.x.x.x.x.x
adParams['k1']:

More on BodyMaps

Take a Video Tour

Learn how to rotate, look inside and explore the human body. Take the tour

BodyMaps Feedback

How do you like BodyMaps? How can we improve it? Tell us what you think

Welcome to BodyMaps. Please select a category below that best describes you: