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In the meanwhile, the disease has appeared in the male ancestor’s family,
but not in the females, and from this faet we can deduct that the male ancestor
must have had the propensity and not the female. A sister of the male ancestor
must have had the same propensity, because, when a grandchild of hers, married
a grandchild of the male ancestor, two of their several children had this serious
INHERITANCE SCHEME RELATING TO THE FAMILY DISEASE
MYOKLONUS EPILEPSY IN BLEKINGE.
disease. Both these parents must therefore have been heterozygots, and the pro*
pensity must have originated from the male ancestor and his sister, through one
of their parents, but not from the female ancestor, or her family.
The first bearer of the propensity for myoklonus epilepsy of which we have
any information thus lived in the 17th century. There we lose all trace. It is
impossible to determine whether the propensity has originated in Sweden, or
was brought here from some other country.
Professor Unverricht in Dorpat was the first to describe the disease in
question.
He has observed several cases in one and the same household in Esthonia.
It is not only possible, but very probable that these families living in Sweden
and Esthonia, had the same root many years ago, for diseases of this type go in
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