We’ve been reviewing the science of ADHD, so to start the New Year (it’s gotta be better), here’s a summary of the neurobiology (as I understand it).
(If this is old stuff to you, please just scroll down to Personal Notes and below.)
The neurotransmitters (chemicals like dopamine, norepinephrine, serotonin and glutamate) are made in the cell body and carried down the tube to the end of the axon.
When the cell is stimulated by other cells an electrical impulse goes down the tube and the end of the axon releases the neurotransmitters that affect other cells to activate them or slow them down.
Each axon connects to many cells and each cell receives from many axons.
The brain is organized into specific regions which seem to have specific functions, such as vision, balance, judgment,etc. (no function is actually carried out by a single region alone). These regions are connected to each other to form networks, and specific networks have specific functions, such as consciousness, movement, memory, etc. (again, not really solo).
So problems, symptoms, can be caused by a problem in any part of this system, in a networks, a regions, some neurons or a neurotransmitter, and a problem in any one of these generally affects all of these parts of the system.
The manufacture, location, connections and functioning of the different parts of the system are controlled by our genes.
Personal Notes O the Day:
2. For completeness of the science series, I may do posts on DSM and statistics. Whew!
3. Again please use the comment section to correct my errors or add information, ask questions, or for anything else you please. I love the comments.
4. Welcome to the new member of the tribe.
Special Note O the Day:
Neurobiology of ADHD– very comprehensive
Networks – a repeat, with other good links
#ADHD, @addstrategies, @adhdstrategies, @dougmkpdp