To be effective, the spermicide must be placed deep in the vagina, close to the cervix. Creams, gels, and foams are squirted into the vagina using an applicator. Other types of spermicides include vaginal contraceptive film (VCF), a thin sheet placed in the back of vagina by hand, and vaginal suppositories.
Causes of Alzheimer's disease. Alzheimer's disease is caused by parts of the brain wasting away (atrophy), which damages the structure of the brain and how it works.
Causes of Alzheimer's disease. Alzheimer's disease is the most common form of dementia. In Alzheimer's, the loss of brain cells leads to the brain shrinking. Part of the brain known as the cerebral cortex is particularly affected by this shrinkage. The cerebral cortex is the layer of grey matter covering the brain.