How would you explain that some blind individuals do not have sleep problems?
A) Light does not readjust their circadian rhythms.
B) These individuals are often prescribed sleeping pills to prevent any sleep disturbances.
C) Because of plasticity, the brain pathways to the SCN become rewired.
D) The pathway for light to the SCN is not damaged while the pathway required for vision is damaged.

Question

Quizplus · Accepted Answer

Blind individuals may not have sleep problems because the pathway for light to the SCN (suprachiasmatic nucleus) is not damaged, while the pathway required for vision is damaged. This allows the SCN to continue to function and regulate the sleep-wake cycle, even in the absence of input from the eyes. Plasticity may also play a role in rewiring brain pathways to the SCN. There is not necessarily a need for sleeping pills to prevent sleep disturbances in blind individuals.

How Would You Explain That Some Blind Individuals Do Not