Abstract：
:The hypothesis that the aortic depressor nerve (ADN) from spontaneously hypertensive rats (SHR) does not show the expected correlation between myelin sheath area and the axonal diameter of myelinated fibers detected in normotensive rat myelinated fibers was tested by means of regression analysis. Proximal and distal segments of ADN from 13 normotensive Wistar-Kyoto rats (WKY) and nine SHR were prepared for light microscopy study. With an image analysis system, the area of the myelin sheath and the axonal diameter of all myelinated fibers in each nerve were automatically measured. Regression lines were calculated for all nerve segments from each group. Differences between the regression lines were tested for slope and intercept and differences between the correlation coefficients were also tested. Regression lines for WKY data showed no differences between the proximal and distal segments either for slope or intercept. Proximal and distal SHR regression lines were not coincident between segments or when compared to WKY data. These results agree with previous observations that there are morphological differences between WKY and SHR myelinated fibers of the ADN suggesting that the SHR depressor nerve fibers present characteristics of axonal atrophy and/or remyelination.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Fazan VP,Salgado HC,dos Reis GC,Barreira AAdoi
10.1016/j.jneumeth.2005.04.007subject
Has Abstractpub_date
2005-10-30 00:00:00pages
130-6issue
2eissn
0165-0270issn
1872-678Xpii
S0165-0270(05)00119-6journal_volume
148pub_type
杂志文章abstract：:The assumptions upon which a correct interpretation of the t-test depends are rarely fulfilled by data from the neurosciences. This applies to both independent and correlated samples. The Mann-Whitney U-test is suggested as an alternative for the t-test for independent samples. The way in which significant results fro...
journal_title：Journal of neuroscience methods
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journal_title：Journal of neuroscience methods
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