ANDREW HUBERMAN 2 | In the SAUNA: Our BRAIN SIGNALS SWEAT or Flight

http://www.DoctorsToTrust.com
presents episode 648 | Dr Andrew Huberman
HubermanLab podcast

Neurons exist in the brain, skin, body that
communicate together allowing you to heat
up or cool down when needed
-shell [skin] has nerve cells
~these have receptors that sense
changes in heat
-send signals into spinal cord
-top of spinal cord has neurons [Dorsal Horn]
~signals relay station in brain
-signals POA [pre-optic area]:
neurons over roof of mouth [in the hypothalamus]
They signal body & brain to change heat
AND CHANGE BEHAVIOR

POA will change the way you think & feel...
Immediately:
Example
If heat touches skin
-POA signals endothelial cells to dilate:
in order to cast off heat
-will start sweating due to POA signals and
acetylcholine
-if shivering: POA signals you to stop
-if over heating: POA signals muscles to spread out
to release heat

POA acts at autonomic level...
-can't make yourself sweat
-vasodilation [dilation of veins & capillaries]
Also voluntary actions prompted by POA
Also: lethargy, tiredness feeling on hot day
When warm enough, we are active
When too warm, we want to slow down,
spread limbs to dump heat

POA can also signal the amygdala...
[brain area that can activate
sympathetic nervous system]
-fight or flight
~stress response
~excited response
POA signals amygdala when you are suddenly in heat that
feels too hot and risky
Example: 210 degree sauna, first minute in:
-heart rate increases
-may feel impulse to get out
Amygdala activates adrenal glands: makes you agitated

||||||||||||||||||

doctorstotrust.com
@hubermanlab

Original Youtube: https://youtu.be/EQ3GjpGq5Y8
This site will never use corruptible, epidemiological survey research.
For each short/sharable video, the original Youtube links are provided

None of this content is intended to be individual, personalized medical advice.

We hope you find value for yourself in these short videos &
find them easy to share with loved ones!

DISCLAIMER:
This video’s content is for informational purposes only and
should not be considered as a substitute for advice
from doctors or any health professional.
We strongly recommend seeking professional healthcare advice
for any medical condition