| neovascularization, physiologic | The development of new blood vessels, especially in tissues where circulation has been impaired by trauma or disease; in healthy tissue transplants to restore circulation between a transplant and surrounding tissue; and across anastomotic sites. (12 Dec 1998) |
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| nystagmus, physiologic | Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (nystagmus, optokinetic), caloric test, or a rotating chair. (12 Dec 1998) |