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Nerves, neurons and synapses
- Nerves are cylindrical bundles of fibers that start at the brain and central cord and branch out to every other part of the body.
- Neurons send signals to other cells through thin fibers called axons, which cause chemicals known as neurotransmitters to be released at junctions called synapses.
- A synapse gives a command to the cell and the entire communication process typically takes only a fraction of a millisecond. Signals travel along an alpha motor neuron in the spinal cord 268 mph (431 km/h); the fastest transmission in the human body, according to Discover magazine.
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The nervous system and vascular disorders
- Stroke, which occurs when there is bleeding on the brain or the blow flow to the brain is obstructed;
- Transient ischemic attack (TIA), which are mini-type strokes that last a shorter period of time but mimic st...
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Pain and the nervous system
Of all the diseases of the nervous system, the most common difficulty that people have is pain, and much of that is nerve-related.
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Diseases of the nervous system
Patients with nerve disorders experience functional difficulties, which result in conditions such as:
- Epilepsy, in which abnormal electrical discharges from brain cells cause seizures
- Parkinson...
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The nervous system
- It is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. It is essentially the body's electrical wiring.
- Structurally, the nervous system has two components: the central nervous sys...
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The Somatic Nervous System
The somatic system is responsible for transmitting sensory information as well as voluntary movement. The system contains two major types of neurons:
- Motor neurons. They carry information from the brain and spinal cord to muscle fibe...
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