StuartGotz

StuartGotz t1_j8u8q48 wrote

There's several reasons for this. There are many things in the blood stream that would be toxic to neurons if they passed the blood-brain barrier. Also, blood spilling out of a hemorrhagic stroke doesn't oxygenate the brain in the normal way though capillaries, where the blood ells progress to veins and then eventually are re-oxygenated. Blood spilling out onto the brain causes most neurons downstream to be deprived of oxygen and nutrients.

4

StuartGotz t1_j6devtz wrote

This is an important philosophical issue. There are 4 Ds in whether something is diagnosed or considered a dsiorder:

  1. Deviance: Varying from the norm, the average of society. This is useful in come situation, like diagnosing memory decline in possible Alzheimer's disease. However, by itself it can overemphasize conformity, which is a problem.
  2. Distress - Is what the person,s experiencing creating some kind of distress or suffering. People used to think of schizophrenia as a “sane response to an insane world”, but really they are suffering horribly as a result of this.
  3. Dysfunction - Does it interfere with a person's ability to get through their day, support themselves, accomplish the things they would like to accomplish.
  4. Dangerousness - This is more of a consideration in forensic settings

ADHD is a spectrum on which we all fall, but the extreme cases that are diagnosed meet the distress and dysfunction criteria.

3

StuartGotz t1_j5jlf7q wrote

I’ve always wondered about this with grey squirrels in the northeastern US, which are practically ubiquitous in the suburbs and in urban parks. With so much interactions with cars, people, buildings I wonder whether natural selection has changed their behavioral or physical characteristics

16