This is supported by the isolated, periclinal nature, the absence of cross-stratification or visible pinching and swelling of laminae across the waves.
They may be a reaction to damage of the internal elastic lamina, caused by intraluminal blood pressure in foetal life.
The internal and external elastic laminae are thick concentric elastic-fibre layers that separate the intima and media, and the media and adventitia, respectively.
The primary pathology seems to be centered on the internal elastic lamina and this may explain why intracranial arteries are not directly affected.
The nuclear lamina is a meshwork of intermediatetype filaments.
Grains (total and non-specific) were counted over 8-10 cells per hemisphere for each lamina, and the mean number of silver grains per cell calculated.
Sampling was limited to the chromitite layers and laminae that occur in the mafic-ultramafic cumulates of these complexes.
In the female reproductive tract, with the exception of the uterus, the cells lie on a thick, irregular (convoluted) basal lamina.
