Læknablaðið - 01.04.1978, Side 16

50
LÆKNABLAÐIÐ
In view o£ this, we are of the opinon that
differences in endogenous factors immunologi-
cal on one hand and chemical and metabolic
in the motor neuron system on the other,
account for the different clinical pictures,
regarding the extension of symptoms and signs
and the rate of disease progression.
Regarding long survial time in M.N.D. slovv
progression of initial symptoms and Iate clini-
cal apperance of extension of the disease
process to other parts of the motor neuron
system, appear to be decisive. We have na
explanation for longevity in M.N.D. in Iceland
which appears genuine even if discrepan-
cies in classification are allowed for. Further
studies are being conducted.
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