Stress and the nervous system
The autonomic nervous system is the part of the nervous system that works automatically and independently of our consciousness. It controls our heart rate and breathing rate. It regulates the function of the visceral organs like the stomach, liver, kidneys, intestines, bladder, and reproductive organs. It does all the things that we don’t have to consciously do or control.
There are two divisions of the autonomic nervous system that the body can switch back and forth from. Both divisions evolved to regulate and protect the body and they both serve very important purposes. However, when the body remains in one division for too long, specifically the sympathetic division, problems occur.
Parasympathetic Division
The parasympathetic division is the wing of the autonomic nervous system that promotes healing and optimal function. It is also known as the “rest, digest, and repair” nervous system. When the body is primarily in the parasympathetic mode, the organs and tissues receive a rich supply of nutrients, perform their regular functions optimally, and regenerate. The parasympathetic is the mode your body is in when you feel most relaxed, at peace, and in deep sleep. The more time you spend in parasympathetic dominance the better the organs and tissues function.
Sympathetic Division
The sympathetic division is the wing of the autonomic nervous system that allows you to make it through a crisis. It is also known as the “fight or flight” nervous system. When the body is primarily in the sympathetic mode, blood flow and resources are shunted to the muscles and periphery of the body. Stress hormones like adrenaline and cortisol are produced, blood pressure increases, and blood sugar rises. The core visceral organs are almost abandoned in the sympathetic mode as things like digestion, bowel movements, urination, and most non-stress hormone-related hormone production significantly decreases. The body becomes focused on preparing the body to fight or run away from a threat.
The sympathetic division evolved to protect us from physical threats, and allows humans and other mammals to survive crisis situations. The sympathetic division is one of the most important mechanisms that has allowed humans to make it this far. However, we now live in a much different world than our ancestors did 1,000, 10,000 and 50,000 years ago. We don’t face the physical threats from predators and other events like our predecessors did.
Nervous System Mammals - News
Rabies is a preventable viral disease of mammals most often transmitted through the bite of a rabid animal. The rabies virus damages the central nervous system, eventually destroying the brain and leading to death. Rabies can affect anyone or any pet
According to the Center for Disease Control, rabies is a virus that attacks the central nervous system ultimately causing disease in the brain and death. Rabies is most commonly spread by the bite of a rabid animal and occurs mostly in wild animals
by Contributed - Story: 62920 In this week's column we investigate the impact of stress on the nervous system and on the way our DNA is selected. The autonomic nervous system is the part of the nervous system that works automatically and independently
She said K. brevis produces a toxin that may affect the central nervous system of birds, fish and mammals. Reisinger said red tides were first observed by Spanish explorers in the Gulf of Mexico. He said since 1986 there have been eight major red tides
Rabies is a deadly virus that infects the central nervous system of mammals, including humans, the state Department of Environmental Conservation said. The disease is most common in bats, raccoons, foxes and skunks. Although rabies is primarily
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An animal with rabies could infect other wild animals or domestic animals that have not been vaccinated against rabies. Florida Statute also requires all dogs, cats and ferrets be vaccinated against rabies at four months and annually thereafter. It is the responsibility of the owners’ to make sure their pets’ rabies vaccinations are current.
Nervous System Mammals - Bookshelf
Development of the nervous system
Thus, the basic features of the nervous system have been around for at least 600 million years, and appear to have been present in animals ancestral to all ...Fundamental neuroscience
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Even from such experiments, inferences about the human nervous system must be drawn with ... Thus, even though the nervous systems in all higher mammals ...Helpful Information Directory
About a Mammal's Nervous System | eHow.com
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Nervous system - Wikipedia, the free encyclopedia
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The nervous system and the endocrine system are closely related to one another in their function, for both serve to coordinate activity. The endocrine glands of
nervous system: Definition from Answers.com
nervous system n. The system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli
Open Directory - Kids and Teens: School Time: Science: Living ...
Mammals : Humans : Nervous System (15) The Senses@ (6) Dyslexia@ (8) ... teachers who are interested in learning more about the nervous system and brain. ...