You don't get distracted by time, because you've lost short term memory.
It has greatly increased his ability to focus on tasks, and short term memory.
A particularly successful model of this type is called Long short term memory.
The main difficulty reported was the loss of their short term memory.
However, it is not an effective way of having information processed and transferred into long term memory.
The problem is that you are not alone with your short term memory.
After this, information is either committed to long term memory, or lost all together.
He later has another stroke that takes his short term memory away.
Also, short term memory decays over a period of time.
Short term memory is made up of the information currently in use to complete the task at hand.