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The Epic Interactive Encyclopedia 1997
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The_Epic_Interactive_Encyclopedia_97.iso
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1992-09-02
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Relief of pain. Opiates alter the perception
or appreciation of pain and are effective in
controlling `deep' visceral (internal) pain.
Non-opiates, such as aspirin, paracetamol,
and NSAIDs, relieve musculoskeletal pain and
reduce inflammation in soft tissues. Pain is
the sensation that is felt when electrical
stimuli travel along a nerve pathway, from
peripheral nerve fibres to the brain via the
spinal cord. An anaesthetic agent acts either
by preventing stimuli from being sent
(local), or by removing awareness of them
(general). Analgesic drugs act on the central
nervous system. Severe or chronic pain cannot
be controlled by drugs. Temporary or
permanent analgesia is achieved by injection
of an anaesthetic agent into, or the severing
of, a nerve. Implanted devices enable
patients to deliver controlled electrical
stimulation to block pain impulses.
Production of the body's natural opiates,
endorphins, can be manipulated by techniques
such as relaxation and biofeedback.