Login / Register

Why We Faint (When Other Animals Don't)

Thanks! Share it with your friends!


You disliked this video. Thanks for the feedback!

Sorry, only registred users can create playlists.

Channel: MinuteEarth
Categories: Biology   |   Psychology   |   Science  
 Find Related Videos  added


Get a limited edition MinuteEarth YETI tumbler when you become a new patron at the $6 or above tiers or upgrade an existing pledge:
Humans are the only animals known to faint due to triggers like shock, fear, or pain; this is due to a combination of our massive brains and upright stance.

To learn more about this topic, start your googling with these keywords:
"Fight or flight": an instinctive physiological response to a threatening situation that readies animals (including humans) to either resist forcibly or escape
Fainting: loss of consciousness caused by a temporary lack of oxygen to the brain, also known as syncope.
Vasovagal syncope: a type of fainting that happens when your body overreacts to an emotional trigger like being in danger, seeing blood, or even just hearing some shocking news.
Tonic immobility: an instinctive physiological response to a threatening situation that causes some animals to relax their muscles and freeze in place, sometimes causing them to fall over
Jump scare: a technique often used in horror films meant to scare the audience with a sudden change on screen, usually paired with a loud sound

If you like what we do, you can help us!:
- Become our patron:
- Share this video with your friends and family
- Leave us a comment (we read them!)

Julin Gustavo Gmez (@thejuliangomez) | Script Writer, Narrator, and Director
Josh Taira | Illustration, Video Editing, and Animation
Nathaniel Schroeder | Music

MinuteEarth is produced by Neptune Studios LLC

Sarah Berman Arcadi Garcia Rius
David Goldenberg Julin Gustavo Gmez
Melissa Hayes Alex Reich Henry Reich
Peter Reich Ever Salazar Kate Yoshida

Piano Jump Scare Stinger by TheSoundFXGuy_YT of
Licensed under CC BY 3.0

Youtube |
TikTok |
Twitter |
Instagram |
Facebook |

Website |
Apple Podcasts|

Alboni, Paolo, and Marco Alboni. "Origin and Evolution of the Vasovagal Reflex." Vasovagal Syncope. Springer, Cham, 2015. 3-17.

Alboni, P., Alboni, M. Typical vasovagal syncope as a defense mechanism for the heart by contrasting sympathetic overactivity. Clin Auton Res 27, 253261 (2017).

Blanc, Jean-Jacques, Paolo Alboni, and David G. Benditt. "Vasovagal syncope in humans and protective reactions in animals." Ep Europace 17.3 (2015): 345-349.

Bracha, H., Bienvenu, O. & Person, D. Evolution and fear-fainting. Clin Auton Res 16, 299 (2006).

Buckey JC, Peshock RM, Blomqvist CG. Deep venous contribution to hydrostatic blood volume change in the human leg. Am J Cardiol. 1988 Sep 1;62(7):449-53.

Furst, Branko. "The Effect of Gravity and Upright Posture on Circulation." The Heart and Circulation. Springer, Cham, 2020. 319-341.

Kozlowska K, Walker P, McLean L, Carrive P. Fear and the Defense Cascade: Clinical Implications and Management. Harv Rev Psychiatry. 2015 Jul-Aug;23(4):263-87.

Roelofs, Karin. "Freeze for action: neurobiological mechanisms in animal and human freezing." Philosophical Transactions of the Royal Society B: Biological Sciences 372.1718 (2017): 20160206.

Sheldon, Robert S., and Roopinder K. Sandhu. "The search for the genes of vasovagal syncope." Frontiers in cardiovascular medicine 6 (2019): 175.

Sun, Benjamin C., Jennifer A. Emond, and Carlos A. Camargo Jr. "Direct medical costs of syncope-related hospitalizations in the United States." The American journal of cardiology 95.5 (2005): 668-671.

van Dijk JG. Fainting in animals. Clin Auton Res. 2003 Aug;13(4):247-55.

Post your comment


Be the first to comment