As mentioned as there are 100s of different types of dementia the most common type is Alzheimer’s.
Alzheimer’s is caused by the death of brain tissue due to tangled and plaques forming and also there is a reduction in the chemicals that transmit messages around the brain.
Alzheimer’s is a progressive disease, which means the symptoms become worse over time. Alzheimer’s first affects the hippocampus which has a central role in short term memories this makes it difficult for those with Alziemer’s to remember recent events and learn new information. Therefore those with Alzheimer’s may lose things, in conversations struggle to find right word or people’s names, forget appointments and get lost in familiar places. As the condition progresses getting lost becomes more common, there is increased problems with speech such as repeating phrases and not remembering words and increased visuspatial problems with tasks like parking.