Simplify the following text for a Grade 14 native English-speaking person.
Original: This negative experience creates an inability to function and an absentmindedness where the manic individual 's thoughts totally preoccupy him or her , making him or her unable to keep track of time or be aware of anything besides the neurological pattern of thoughts .
Simplified: This experience creates an absentmindedness where the manic individual 's thoughts totally preoccupy him or her , making him or her unable to keep track of time , or be aware of anything besides the flow of thoughts .