What is your fear response: fight or flight?
When faced with imminent physical danger, the human body’s sympathetic nervous system triggers our"fight-or-flight" response. The sympathetic nervous system is a normally harmonized network of brain structures, nerves and hormones that, if thrown off balance, can result in serious complications.
The sympathetic and parasympathetic nervous systems work together to maintain this baseline and normal body function. The hypothalamus then relays the alert to the sympathetic nervous system and the signal continues on to the adrenal glands, which then produce epinephrine, better known as adrenaline. This hormone triggers the profuse sweating, rapid heartbeat and short breaths we associate with stress. If the danger persists, the hypothalamus sends a new message through the nerve system grapevine, instructing the adrenal glands to produce the hormone cortisol to keep the stress response rolling.
What happens when it doesn't work?The sympathetic and parasympathetic nervous systems rest on either side of a wobbling scale; each system remains active in the body and helps counteract the actions of the other. If the opposing forces are mostly balanced, the body achieves homeostasis and operations chug along as usual. But diseases can disrupt the balance.
"Everyone thinks about Parkinson's disease in terms of its motor symptoms, but these autonomic symptoms actually appear long before," said Dr. Marina Emborg, director of the Preclinical Parkinson's Research Program at the University of Wisconsin-Madison. Changes in sympathetic nervous activity are evident in the skin, pupils and especially the heart.
Sympathetic dysfunction also underlies mental health conditions such as anxiety, depression and chronic stress, an article in Forbes reported. In short bursts, the body's physical stress response can be useful and grant an energizing boost of mental focus. If prolonged, however, the stress signals whizzing through the body wreak havoc.
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
UFC 281 fight card: Why Adesanya and Pereira is the fight you can’t missOne of UFC’s biggest stars, Israel Adesanya, will go head to head with kickboxing world champ Alex Pereira. Anything can happen in the Octagon at UFC 281 this Saturday exclusively streaming on ESPN…
続きを読む »
Passenger with box cutters on Frontier Airlines flight prompts emergency landing: TSAATLANTA — (ATLANTA) -- A passenger on a Frontier Airlines flight who allegedly boarded the plane with two box cutters and was seen acting erratically was taken into custody after an emergency landing Friday night, according to the airline and the Transportation Security Administration.
続きを読む »
Veterans stop armed passenger who forced Frontier flight to divert and land'That's not going to happen again,' one of the veterans said as he explained he joined the Navy in 2001, and 9/11 was at the forefront of his mind during this flight.
続きを読む »
Veterans stop armed passenger who forced Frontier flight to divert and land'That's not going to happen again,' one of the veterans said as he explained he joined the Navy in 2001, and 9/11 was at the forefront of his mind during this flight.
続きを読む »
Flavor Flav Curses Out Spirit Airlines After Missing FlightFlavor Flav was left hanging outside a Las Vegas hangar after missing his flight the other night ... but his emotions still understandably shot through the air!!!
続きを読む »
NASA: Moon rocket endured hurricane, set for 1st test flightNASA's moon rocket needs only minor repairs after enduring a hurricane at the pad and is on track for its first test flight next week, a top official said Friday.
続きを読む »