Muscle twitches are brief, painless, involuntary movements of parts of muscles. Some are visible under the skin, others are just felt. Disorders affecting any part of the nervous system that controls movement, or the muscles themselves, can result in muscle twitches.

Exercise can be effective in the treatment and management of a number of chronic health conditions. According to the American Academy of Orthopedic Surgeons, participation in physical activity can also be useful for those who suffer from acute conditions -- including cauda equina syndrome.

Barbiturates or barbituates are in the same classification as benzodiazepines (Valium, Librium and more) and act as depressants on the central nervous system, which basically means that barbiturates decrease excitability in the brain to produce a calming and sedative effect.

When you talk about a limb falling asleep, typically, you’re referring to a sensation of tingling, numbness or burning caused by pressure that constricts your nerves for an extended period of time. This strain interferes with electromechanical impulses between your brain and the affected limb, causing discomfort.

The Central Brain Tumor Registry estimates that 68,470 people will be newly diagnosed with a brain tumor in the United States in 2015. There are many types of brain tumors, which arise from cells in the brain or surrounding tissues. Some grow in the cerebrum -- the largest part of the brain.

The National Institute of Neurological Disorders and Stroke defines carpal tunnel syndrome as a condition in which excessive pressure on the median nerve leads to pain, tingling, and numbness in the palm and fingers.

Puncture wounds are caused by a sharp object, such as a nail, that penetrates skin layers and leaves behind a piercing in the skin. These wounds are prone to infection, as bacteria can be driven deep inside skin, and can be difficult to clean thoroughly.

When the myelin, or outer sheathing covering the nerves, is degenerated, it results in nerve damage. When this happens, the nerves are unable to function properly in normal communication between the brain and spinal cord. Vitamin deficiency is one cause of nerve damage.

Cerebral hypoxia, or brain hypoxia, develops when the brain does not receive enough oxygen to sustain its normal metabolism. Out of all the organs, a lack of oxygen is most dangerous to the brain. Neurons begin to die after they have been without oxygen for approximately five minutes (Ref 1).

Numbness is a symptom associated with a plethora of diseases and disorders. Transient numbness not accompanied by pain or changes in skin color may be a normal response to cold temperatures or other benign conditions. Persistent or recurrent numbness, however, always requires medical attention.

Topiramate is an anticonvulsant used to treat some types of seizures in individuals with epilepsy and Lennox-Gastaut syndrome. It may also be prescribed to prevent migraines and to manage an alcohol addiction. Unfortunately, weight loss, along with other gastrointestinal problems, is a side effect of the medication.

Caffeine, chemically known as 1,3,7-trimethylxanthine, is considered to be the most popular, largely unregulated drug in the world. Caffeine is consumed in coffee, tea, cocoa, chocolate, many soft drinks and some drugs.