SciShow
What Happens When You Faint?
Why do we faint? Because sometimes, your nervous system just doesn’t know what to do with itself.
SciShow
Carcolepsy: Why Do We Get Sleepy in Cars?
It turns out there are number of aspects of driving that can potentially conspire to lull our bodies into a potentially dangerous state of drowsiness.
SciShow
Anxiety Hurts
Everybody knows what anxiety feels like - it's annoying and counterproductive and apparently useless, so why does it exist? It turns out your anxiety isn't useless at all - it's a result of the sympathetic nervous system (in charge of...
MinuteEarth
Why We Faint (When Other Animals Don't)
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.
Bozeman Science
Fight or Flight Response
Paul Andersen explains how epinephrine is responsible for changes in chemistry of our body associated with the fight or flight response. Epinephrine released by the adrenal medulla are received by a number of organs associated with the...
Curated Video
Adrenaline
Also called epinephrine, a hormone produced by the adrenal glands, which are found just above the kidneys. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
The Noted Anatomist
Autonomic innervation of the heart
This video tutorial briefly covers the sympathetic and parasympathetic role on heart innervation. It focuses on the following: - Sympathetic neurotransmitters (epinephrine and nor-epinephrine) and receptors (adrenergic). -...
Institute of Human Anatomy
Understanding the Physiology of Stress and its Health Consequences
This video discusses the physiological response to stress, including the activation of the sympathetic nervous system and the release of cortisol. It explores how these responses evolved to deal with primitive stressors and how they can...
Curated Video
Night Hag Syndrome: Exploring Sleep Paralysis and Hallucinations
Learn about the phenomenon of sleep paralysis, also known as the night hag syndrome. This video explains how sleep paralysis occurs when the body is in a sleep-like state while the mind and eyes are awake, causing a feeling of being...
Australian Broadcasting Corporation
What Does Being Anxious Feel Like?
Mikki vs the World is a creative, funny, and factual series designed to help teens get a grip on what’s happening inside their heads. Dr. M asks the panel of teenage experts for advice about anxiety and its symptoms. Internet Lady...
Professor Dave Explains
The Autonomic Nervous System: Sympathetic and Parasympathetic Divisions
We've learned quite a bit about the peripheral nervous system, which has a sensory division and a motor division. The latter is the one that tells the body what to do, and this is divided into the somatic nervous system, which involves...
CBC (Canada)
Why Do We Get Nervous?
Sweaty palms, fingernail biting, racing heart. From prepping for a big exam or delivering an important presentation to stepping onto the field before the whistle is blown, we have all experienced nervousness in our lives. Perhaps by...
Curated OER
Deadly Venomous Viper
The pit viper takes advantage of tall trees to spy on its prey. It is found throughout Southeast Asia and its deadly venom strikes birds, frogs, and other helpless small animals. Watch this video to learn about a snake's incredible pits...
PBS
Pbs Learning Media: Crash Course Anatomy and Physiology: Sympathetic Nervous System
Host Hank Green tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system. [10:43]
PBS
Pbs Learning Media: Crash Course Anatomy and Physiology: Autonomic Nervous System
Take a tour of the two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences-where...