S., which cannot be cured at all, causes constant pain, and pretty much made her into a "living" vegetable.

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He was in constant pain, could barely walk, and had to retire from his job as a top EPA chemist.

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They said she is in constant pain since the fracture last October.

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Michelle Bennett's husband Paul, whose Motor Neurone Disease left him paralysed and in constant pain, died in a Dignitas clinic in May 2006.

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Neuropathic pain, which results when nerves are damaged and send constant pain signals to the brain, can result from diabetes, chemotherapy or injury.

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The four-day appeal hearing was told that she is in the final stages of MS, can only move her head, cannot swallow and lives in constant pain.

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The court was told that Ms Fleming, who is not attending the three-day hearing, is confined to a wheelchair, physically helpless, lives in constant pain, cannot swallow and suffers choking sessions which wear her out.

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The court has previously heard that Ms Fleming, who is not attending the three-day hearing, is confined to a wheelchair, physically helpless, lives in constant pain, cannot swallow and suffers choking sessions which wear her out.

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By the day of her operation, in December 2009, she had stopped working because of the constant, agonising pain.

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The ratings, required every 15 seconds, were covertly used to keep pain levels constant.

ECONOMIST: Pain perception