- detrusor i. involuntary detrusor contractions that may occur at bladder volumes below capacity. SYN: detrusor hyperreflexia.
- spinal i. the inability of the spinal column, under physiologic loads, to maintain its normal configuration; may result in damage to the spinal cord or nerve roots or lead to the development of a painful spinal deformity.
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in·sta·bil·i·ty .in(t)-stə-'bil-ət-ē n, pl -ties the quality or state of being unstable esp lack of emotional or mental stability
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in·sta·bil·i·ty (in-stə-bilґĭ-te) lack of steadiness or stability.Medical dictionary. 2011.