Most survivors complain that they can no longer multitask. You probably never could do it but this article explains what is possible.
http://news.sciencemag.org/sciencenow/2010/04/multitasking-splits-the-brain.html#.UXXc0CBC5d8.twitter
When the brain tries to do two things at once, it divides and
conquers, dedicating one-half of our gray matter to each task, new
research shows. But forget about adding another mentally taxing task:
The work also reveals that the brain can't effectively handle more than
two complex, related activities at once.
When it comes to task management, the prefrontal cortex is key. The
anterior part of this brain region forms the goal or intention—for
example, "I want that cookie"—and the posterior prefrontal cortex talks
to the rest of the brain so that your hand reaches toward the cookie jar
and your mind knows whether you have the cookie. So what happens when
another goal enters the mix?
To find out, neuroscientists Etienne Koechlin and Sylvain Charron of
the French biomedical research agency INSERM in Paris turned to
functional magnetic resonance imaging, which measures changes in brain
activity. They monitored 16 women and 16 men, aged 19 to 32, as they
performed a complicated letter-matching task. Shown letters pulled at
random from the word “tablet” on a computer screen, volunteers had to
determine whether two successive letters (either all lowercase or all
uppercase) appeared in the same order as they do in the word. To
multitask, they also had to deal with uppercase and lowercase letters at
the same time, matching them to either all uppercase or all lowercase
words. The volunteers received a small amount of money if they performed
well.
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