For the first one the answer is Abduction and the second one is called Flexion. Hope I helped!
For health care it is best to be provided with research papers which are the most accurate place to find information: PubMed and Nature magazine can be two choices you can research things without worrying about reliability
Beginning signs would be memory loss, inability to do challenges, difficulty completing tasks, confusion with time, misplacing things, poor judgment, etc
Answer:
It develops when the immune system overreacts to a drug, dust, and ect.