IPA was of primary origin in 21 patients (24%) and of secondary origin in 67 (76%).
Huntington's disease (HD) is a neurodegenerative disorder previously thought to be of primary neuronal origin, despite ubiquitous expression of mutant huntingtin (mHtt).
Recognizing that cardiopulmonary arrest can be of primary cardiac origin and secondary to other acute conditions, many researchers now limit their study populations to those with ventricular fibrillation and pulseless ventricular tachycardia in an effort to select subjects with high probability of primary cardiac origin arrest.
Some dinoflagellates, for example, have plastids with two membranes that clearly are not of primary origin [32].
Mitochondrial dysfunction can be of primary (inherent) or secondary (acquired dysfunction) origin [7], [32].
Then, one interpretation is that the low-temperature components are attributable to post-depositional chemical remanences, associated possibly with the later formation of the mineral phase having Tub ~ 300 °C, whereas the high-temperature components are of primary detrital origin that survived later chemical influence.
In the present study, we found that all of the NF200-positive/NK1r-negative NF200-positive/NK1r-negative NF200-positive/NK1r-negative substaneuronsmmunoreactive axons, and it is likely that many of these axons with of primary afferent origin.
In the rat, many of these fibers are of primary afferent origin and, among the latter, most are immunoreactive to CGRP (McNeill et al. 1988; Tamatani et al. 1989; Patterson et al. 1990) and a smaller number to SP (Tamatani et al. 1989).
Pediatric tricuspid regurgitation is likely to be related to annular dilation of primary origin, as it occurs without heart failure or elevated pulmonary artery pressures.
The question whether the lipid alterations and the resulting impaired barrier function in canine atopic skin are of primary or secondary origin remains unanswered.
