Stroke: An Assault on the Brain

1. Explain what happens to the brain when a stroke occurs.

 When a stroke occurs, brain is noit getting enough blood supply and therefore is shortened of oxygen supply.

2. Briefly explain the differences between the three different types of strokes.

Ischemic stroke occurs when arteries are clogged by blood clots that lad to head. This type of stroke divides in embolic and thrombotic. Embolic stroke occurs when a blood clot form somewhere in the body, break off and travel to the head where they block brain's blood vessels. Thrombotic stroke occurs when a clot forms in the artery supping blood to the brain.

3. Identify some of the most common risk factors - in other words, who is most likely to have a stroke?

Old people, people with hich cholesterol and high blood pressure. And people who eat unhealthy things that makes them fat and clogs their arteries. also stress increases stroke chances along with genetics.

4. What disabilities can result from a stroke?

Paralyzation, death, unability to speak...Depending on what part of the brain is damaged during the stoke.

5. What is brain plasticity and what does it mean in terms of recovering from a stroke? 

Brain plasticity is the ability of brain to change. This change occurs due to learning something new or a damage to the brain. While it was thought that brain doesn't form/destroy the pathways, it is possible even in adulthood. Stroke may change some pathways in brain as a result, slightly changing its functions.




Notes from video:
atroke every 45 seconds in america
stroke- brain attack when blood supply is damaged, results in death of cells and brain damage, skills controlled by that area are lost (speech, movement, memory)
effects on person dependson what area was afflicted and how much damage was done
ischemis stroke- 83% of cases, occur when artyeries are clogged by blood clots that lead to tyhe head- resultsin issufiecient oxygen supply to that part of the brain
divides into embolic and thrombolic
embolic  when blood clot formss somewhere in the body and breaks of and travels to the head and blocks brain's blood vesels
thrombatic forms clot in artery suppling bloodto tye brain

hemorragic strokes- 75% of cases, more dangerous,  when aa blood vessel in brain ruptures and bleeds into the brain causing pressure on brain tissue
intercerebral or subarachnoid
intercerebral occurse when bleeding occurs in thebrain itself, high blood pressure is the main cause
subarachnoid hemmorage occurs when blood spills to the spinal fluid around the brain  causing it to be surrounded by conaminated fluid

Source:
https://www.youtube.com/watch?feature=player_embedded&v=fKrXCly1kK0
http://www.brainandnerves.com/uk/blood-vessels-of-the-brain/stroke/