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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.
![Cortical EEG recorded during epileptic attacks. Notice that each trace is characterized by epileptic ...](https://biology-forums.com/gallery/30/medium_548020_06_06_17_11_06_42_303781743.png)
![Multiple sclerosis is characterized by damage to the myelin sheath surrounding the axons of motor ...](https://biology-forums.com/gallery/30/medium_548020_08_06_17_6_58_35_306151118.jpeg)