Canadian Neurovascular Health Society Director, Dr. Bernhard Juurlink, discovered astrocytes are more vulnerable to conditions of hypoxia than neurons or myelin.

Astrocytes play a key role in bodily functions we undertake 'without thinking'

http://www.psypost.org/2015/05/astrocytes-play-a-key-role-in-bodily-functions-we-undertake-without-thinking-34315

Chewing, breathing, and other regular bodily functions that we undertake “without thinking” actually do require the involvement of our brain, but the quest ...