脊柱的生理曲度有四个生理曲度，颈曲与腰曲为前曲，胸曲与骶曲为后 ...
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WikiAnswers - What does cervical hypolordosis mean Womens Health question: What does cervical hypolordosis mean? Hypolordosis means a reversal of the normal spinal curvature, and cervical refers to the neck, ...
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颈曲 normal is 前曲 (lordosis),反弓 is opposite of the normal lordosis (kyphosis).

When viewed from the side, the normal cervical spine curves slightly inward. This inward curve is called lordosis. Kyphosis is a term used to describe a type of abnormal curve in the spine. A kyphotic curve looks like the letter "C" with the opening of the C pointing towards the front. This type of curve is the opposite of a normal lordotic curve, which has the opening facing towards the back.
http://www.allaboutbackandneckpain.com/html/spinesub.asp?id=...

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Note added at 21 hrs (2010-02-28 03:01:57 GMT)
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Explains the normal lordosis (curvature) of neck with diagram.

Cervical kyphosis is a name given to the condition where the normal curve of the neck begins to straighten. Cervical kyphosis can progress to the point where the curve in the neck actually reverses, going in the opposite direction from its normal, healthy state.
http://backandneck.about.com/od/conditions/p/reversecervcurv...


additional term for 颈椎反弓 is reversed cervical lordosis besides cervical kyphosis or hypolordosis.