A classical physiological observation not usually apparent with methods used for detecting nerve potential in man, heterochronia of the nerve fibres is often found in extraordinary circumstances with considerably higher than normal frequence : mainly in muscular disorders, in particular myotonic dystrophy ; more incidentally in disorders of muscle tone. The authors draw attention to certain sources of error which could lead to wrong diagnosis of heterochronia and emphasize that these are only the initial results of research which needs to be pursued further.
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[Information analysis of neurocytes of various peripheral ganglia, and critical periods of their differentiation].
Arkh Anat Gistol Embriol
February 1983
Calculation of the informatory parameters of entropy and redundancy performed, taking as a base nuclear-cytoplasmic relations of neurocytes in the inferior ganglion of the vagus nerve, in the superior ganglion and in the interorganic ganglia of the respiratory tube, demonstrated certain interconnection of the integral characteristics obtained with some stages of the neuronal morphological differentiation. Periods of an abrupt reduction in the redundant information up to the minimal values which goes in parallel with an increasing entropy on the 2d-4th months of embryogenesis (taking into account heterochronia in the development of various ganglia) are considered as some critical periods in the neuron development when it passes to the stage of growth (the first critical period) and to the stage of maturation (the second critical period). Their existence is regarded in connection with the hierarchical joining of the vascular and neural trophic types of the vegetative ganglia.
View Article and Find Full Text PDF[Heterochronia of nerve fibers in man. Diagnostic value: initial results].
Rev Neurol (Paris)
March 1975
A classical physiological observation not usually apparent with methods used for detecting nerve potential in man, heterochronia of the nerve fibres is often found in extraordinary circumstances with considerably higher than normal frequence : mainly in muscular disorders, in particular myotonic dystrophy ; more incidentally in disorders of muscle tone. The authors draw attention to certain sources of error which could lead to wrong diagnosis of heterochronia and emphasize that these are only the initial results of research which needs to be pursued further.
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