Vanessa, who is 40, apparently believes that she is 20-year-old woman. Suddenly, she starts to speak

Vanessa, who is 40, apparently believes that she is 20-year-old woman. Suddenly, she starts to speak and behave very different, and says that she no longer thinks of herself being Vanessa. Instead she claims to be Elise, a 10-year-old child. It is likely that Vanessa has just experienced a:

<div class="