Too much screen time can change brain functionality. This is known as neuroplasticity. Anything that the brain is engaged in for three hours or more per day that is considered highly stimulating will rewire the brain’s circuitry. And we know the average person is spending way more than three hours per day using screens. Essentially, the brain will adapt to the new cyber environment by growing new neural pathways. The neural pathways that are not being utilized enough get pruned away.