The term âdementiaâ is used to describe a set of symptoms that can include memory loss, difficulty thinking, problem solving, or issues with language. Dementia is caused by damage to the brain cells, and because Alzheimer's is a disease that destroys the brain, it is one of the most common causes of dementia.
Most spider bites cause minor swelling, inflammation, and itching. However, bites from poisonous spiders can cause more severe reactions. Black widow bites affect the nervous system. The bite from a black widow may go unnoticed or may feel like a pinprick.
The venom of a funnel web spider has a severe impact on the respiratory system. It attacks the muscles of the heart, which cause a spike in blood pressure, making the muscle spasm. It also can cause extreme salivation and tingly lips.