Betül M
@Anaphora
slowing down when it is required to speed up
The ADD group showed excessive "slow wave" activity during directed tasks such as reading or drawing. As would be expected normally, the non-ADD group had increased fast-wave electrical responses to the same task. In other words, in the ADD group electrical activity in the cerebral cortex, or gray matter, slowed down just when it would have been required to speed up.
Her çiçeğin bir mevsimi, her kitabın bir zamanı vardır. Haziranın tadını yeni hikâyelerle çıkarın.
hyperactivity and underactivity
It may seem paradoxical to consider that hyperactivity of mind or body can be caused by an underactivity of the cortex.
order x disorder
There is order. Now imagine that the policeman falls asleep on the job. There will ensue tremendous activity as cars from all directions attempt to move through the intersection, their drivers increasingly frustrated, their horns joined in a deafening cacophony. Despite all the commotion, there is little progress. Fewer and fewer cars are able to move purposefully. There is a disorder.
the analogy of policeman III
One way to understand ADD neurologically is as a lack of inhibition, a chronic underactivity of the prefrontal cortex. The cerebral cortex in the frontal lobe is not able to perform its job of prioritizing, selection and inhibition.
the analogy of policeman II
Our initial response to a stimulus, whether anxiety producing or pleasurable, is unconscious. It comes not from the cortex but from lower brain centers where emotions originate. The cortex has a split second to decide whether to give permission to the impulse or cancel it.