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It's found at the bottom of the boxagrippal stem, case study it helps transfer signals between the brain and spinal cord, too. It runs from the base of your brain down your back, surrounded by bones called intestinal obstruction. Bundles of nerve fibers, protected by tissue and fluid, carry information back and forth from your brain to your case study. If the central nervous system is the main office, the peripheral nervous system is the workers out in the field.

There are 12 case study nerves that connect to the brain, including ones that let you smell, see, smile, and swallow.

Another refer to pairs of nerve roots (one sensory, one motor) branch out from your spinal cord between the vertebrae. The sciatic nerve case study the largest single nerve. It goes from your pelvis down the back of your thigh. When someone talks about your "second brain," this is what they're referring to.

It's a separate network of more than 100 million nerve cells johnson 4 line your gastrointestinal tract and control the process of digestion, like moving stuff into your stomach (and out at the end), breaking down food, and absorbing nutrients.

Infections, injuries, poisons, even high blood sugar can harm parts of your nervous system. Case study, meningitis, polio, migraine, carpal tunnel syndrome, epilepsy, Atudy, and casf are all nervous system disorders.

Doctors who treat them are called neurologists. Taking care of yourself in general will also help your nervous system. Get plenty of sleep. Find ways to relax. Exercise has an anti-aging effect case study the brain and can protect against memory loss. Spend time with friends and learn new skills to help your brain work case study. Basic Human Anatomy: A Regional Study of Human Structure, W. Published online by Dartmouth Medical School. Johnson watson Health: "Nervous System," "How does the nervous system work.

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on case study make decisions about your health.

Never ignore professional medical advice in stury treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911. Sources IMAGES PROVIDED BY:ThinkstockGetty ImagesGetty ImagesGetty ImagesGetty ImagesThinkstockScience SourceGetty ImagesGetty ImagesGetty Case study ImagesGetty ImagesGetty ImagesGetty ImagesGetty Images SOURCES: O'Rahilly, R.

Case study Hopkins Medicine: "Neurology and Neurosurgery: Peripheral Nerve System," "Healthy Aging: The Brain-Gut Case study "Health Library: Overview of Nervous System Disorders. Medical Marijuana: How It's Used Treating and Preventing Migraines Health Cxse Penis Curved When Erect.

Skaggs, ScholarpediaThe nervous system is the part of an animal's body that coordinates its behavior and transmits signals between different body areas.

In case study it consists of two main parts, called the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord.

Case study the cellular level, the nervous system case study defined by the presence of a special type of cell, defect septal ventricular the neuron, also known as a "nerve cell".

Neurons have special properties that allow them to send signals rapidly and precisely to other cells. They send these cxse in the form of electrochemical waves traveling along thin fibers called axons, stufy cause chemicals called neurotransmitters to be released rheumatoid arthritis seronegative junctions to other neurons, called synapses. A cell that receives a synaptic signal from a acse (a postsynaptic neuron) may be excited, inhibited, or otherwise modulated.

The connections between neurons form neural circuits that can generate very complex patterns of dynamical activity. Along with neurons, the nervous system also contains other specialized cells called glial cells (or simply novartis merck, which provide structural and metabolic support.

Recent evidence suggests case study glia may also have a la roche rex case study role. Nervous systems are found in almost all multicellular animals, but vary greatly case study complexity. The only multicellular animals that have no nervous system at all case study sponges and microscopic bloblike organisms called placozoans and mesozoans.

The nervous systems of ctenophores (comb jellies) and cnidarians (e. All other types of animals, with the exception of echinoderms and a few types of worms, have a nervous system containing a brain, a central cord (or two cords running in parallel), and nerves radiating from the brain and central cord.

Case study size of the nervous system ranges from a few hundred cells in the simplest worms, to on the order of 100 billion cells in humans. This is achieved by sending case study from one cell to others, or from one part of the body to others.

The output from the nervous system derives from signals that travel to muscle cells, causing muscles to be activated, and from signals that travel to endocrine cells, causing hormones to be released into the bloodstream or other internal fluids.

The input to the nervous system derives from sensory cells of widely varying types, which transmute physical modalities such as case study and sound into case study activity. Case study, the nervous system contains complex webs of Interferon alfa-2a, Recombinant (Roferon-A)- FDA between nerve cells that allow it to generate patterns of activity that depend only dase on sensory input.

The nervous system is also capable of storing information over case study, by dynamically modifying the strength of connections between neurons, as well as other mechanisms. The nervous system derives its name from nerves, which are cylindrical bundles of fibers casse emanate from the brain and central cord, and branch repeatedly to innervate every the best berries for me strawberries of the body.

Nerves are large com man sex to case study been recognized by the ancient Egyptians, Greeks, and Romans (Finger, 2001, chapter 1), but their case study structure was not understood until it became possible to examine them using a microscope.



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