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 Dementia. There are many potential dementia causes. The most common cause is Alzheimer's disease, which is responsible for more than half of all dementia cases. Other common causes of the condition include a brain tumor, brain cancer, hypothyroidism, and vitamin B12 deficiency. Dementia is a descriptive term for a collection of symptoms (such as personality changes, memory problems, and behavioral problems) that can be caused by a number of conditions that affect the brain.