A small tube (the catheter) that is placed into the fatty space around the spinal cord. Various medications can then bathe the roots of the nerves as they come in or out of the spinal cord. Perhaps its most familiar use is treating the pain of labor.
The space within the bony structure of the spinal column that surrounds the spinal cord itself. This space is filled with fat , which acts as padding, and blood vessels.
A discomfort described as bugs crawling on the skin. It is commonly associated with delirium tremens (alcohol withdrawal).
A model for pain mechanisms. It describes how nerve fibers that don't cary pain signals can block the passage of pain signals to the brain. It 'explains' why rubbing a sore spot can help it feel better.
Being unusually sensitive to a painful stimulus. This is different from being a 'wimp'. This seems to be a result of changes to sensitivity to stimulus in the nerves.
Being unusually sensitive to a stimulus. Note that it may apply to non-painful stimuli.
An unusually painful response to a stimulus. An example woud be a pin prick that, instead of just being 'painful' is excrutiating/ disabling.
A reduced response to a painful stimulus.
A reduced response to stimuli, not just pain (but it may include pain).
Pain that comes on (typically quickly) due to a specific event, such as putting weight on a painful joint. This can occur in both chronic pain patients (in addition to an underlying chronic pain) or in 'healthy' individuals.
Being within the layers of the dura. This is the space filled by the cerebrospinal fluid.
A catheter (tube) placed inside the layers of the dura. This allows direct access to the nerves of the spinal cord and the cerebrospinal fluid (CSF). Very small amounts of medication delivered to this space may produce results.
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