A brain tumor is a growth of abnormal cells in the tissues of the brain. Brain tumors can be benign, with no cancer cells, or malignant, with cancer cells that grow quickly. Some are primary brain tumors, which start in the brain. Others are metastatic, and they start somewhere else in the body and move to the brain. Brain tumors can cause many symptoms. Some of the most common are.
The definition of a restraint is something that restricts freedom or prevents someone from doing something. When someone is tied up and prevented from moving, this is an example of restraint.
control conÂ·trol (kÉn-trÅl') v. conÂ·trolled, conÂ·trolÂ·ling, conÂ·trols. To verify or regulate a scientific experiment by conducting a parallel experiment or by comparing with another standard. To hold in restraint; check. n. A standard of comparison for checking or verifying the results of an experiment. In an experiment to test the effectiveness of a new drug, for example, one group of subjects (the control group) receives an inactive substance or placebo, while a comparison group receives the drug being tested.