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sensory or afferent nerves
carry impulses from sense organs to brain or spinal cord
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motor or efferent nerve
carry impulses from brain or spinal cord to muscles or glands
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crainial nerves
- part of peripheral nervous system, 12 pairs.
- Olfactory- smell
- Optic- vision
- Oculomotor, Trochlear,Abducens- eye muscle
- Vagus- throat, heart, digestive system
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spinal nerves
31 pairs, Cervical, Thoracic, Lumbar, Sacral
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plexus
network of adjacent spinal nerves and veins
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sympathetic system
- consists of two cords
- fight or flight, releases hormones
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parasympathetic system
- active nerves: pelvic and vagus
- counteract effects of sympathetic
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reflex act
unconscious and involuntary nervous response
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stimulus
change in environment
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receptors
special structures that pick up stimuli
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effectors
responding organs
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neuritis
- inflammation of a nerve or a nerve trunk
- symptoms are severe pain hypersensitivity, loss of sensation, weakness, atrophy
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paresthesia
- tingling, burning, and crawling of the skin
- associated with alcoholism or lack of vitamin B
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Sciatica
- form of neuritis that affects the sciatic nerve
- pain in the buttock or behind the knee, difficulty walking
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Neuralgia
sudden, severe, sharp pain on pathway of nerve.
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Trigeminal neuralgia
- condition that involves the fifth cranial nerve (trigeminal)
- brought on by change in temp, breeze
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Bell's Palsy
- involves 7th cranial nerve (facial)
- stroke like facial movements
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Shingles or herpes zoster
acute viral nerve infection. unilateral inflammation of cutaneous nerve.
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Carpal Tunnel Syndrome
affects median nerve and flexor tendons that attach to wrist (carpal)
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electromyograph
used to determine electroactivity through muscle
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Cumulative Trauma Disorders
typing everyday
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