A brain hemorrhage, or hemorrhagic stroke, occurs when a blood vessel inside the brain bursts, causing bleeding into brain tissues. It is a life-threatening medical emergency; quick treatment can slow or stop the bleeding, minimizing damage.

Dopamine is a neurotransmitter, a chemical in your brain that regulates things like emotion, behavior, alertness and impulsivity. The University of Texas College of Pharmacy describes dopamine as being similar to adrenaline.

Dopamine is a naturally occurring chemical in the body that controls movement, emotional responses, pleasure, pain and motivation. Dopamine is a neurotransmitter that helps to ensure that the brain works properly with your body. Therefore, creating a balance of dopamine is essential to your mental and physical health.

An infant is born with very weak neck muscle and little head control. He relies on parents to support this delicate area until he develops the strength over the course of the year to do this himself.

A concussion presents a serious brain injury, and depending on the severity of it, can present long term health ramifications or even death if you fail to properly take care of yourself afterward. If you want to resume your weight training regimen after a concussion, you must exercise caution.

A magnetic resonance imaging (MRI) scan of the brain uses powerful magnets and radio waves to produce a detailed picture of the brain and nerve tissues.

If your child is experiencing any kind of memory loss or problems retaining information, it could be a sign of a serious medical condition. In some cases, short-term memory problems have no real cause and can be difficult to diagnose.

The National Institutes of Health (NIH) defines long-term memory loss as difficulty remembering events that occurred further in the past.

Concussions are common but often go under-reported. A statement from the 3rd International Conference on Concussion defines concussion as "a complex pathophysiological process affecting the brain, induced by traumatic biochemical forces." Symptoms of a concussion can be variable.

The temporal lobes of the brain are located just above each ear. These lobes are associated with auditory perception, visual object recognition, sensory input storage, social behavior, emotion and memory. The lobes are divided into the dominant left lobe and non-dominant right lobe.

A brain injury can be devastating, not only with regard to physical disabilities and lack of function, but for memory, speech, cognitive thinking and reasoning processes as well.

The human brain is physically separated into two cerebral hemispheres. These hemispheres collaborate in cognitive functioning. For example, the brain's left side controls speech while its right side interprets language.