Welcome to HealthcareMagic forum.
any infection , constant fever
which reaches high temperature , dehydration
, electrolyte imbalance
, etc , can cause these seizures , we need to investigate the reason by blood and urine tests.
The loss of memory may be transient or permanent, it may be due to changes in electrolytes and the fever, on solving the above her memory may come back slowly. I can also think of a vessel / artery problem like stroke
, etc, which is common in mid aged and elderly to cause this.
Wishing her good health