The article also notes:
The main stroke warning signs with respect to texting would be unintelligible language output, or problems reading or comprehending texts," said Klein. "Many smartphones have an ‘autocorrect' function which can introduce erroneous word substitutions, giving the impression of a language disorder."
Autocorrect, said Savitz, a professor of neurology, can confuse matters - even for doctors. "I have often joked with my colleagues when using the dictation of the smartphone, that it gives me an aphasia," he said. "Potential for lots of false positives!"