Question

1. what happens to the unused brain areas of someone that is blind or deaf? what happens if a blind person uses one finger to read braille?

Explanation:

When a person is blind or deaf, the unused brain areas related to vision or hearing can be rewired. This is due to neuroplasticity, the brain's ability to reorganize itself by forming new neural connections throughout life. For a blind person using one finger to read Braille, the brain area representing that finger in the somatosensory cortex (which processes touch - related information) expands. This is because the increased sensory input (from reading Braille) leads to more neural activity and thus, more neural resources being allocated to that specific finger.

Answer:

For a blind or deaf person, unused brain areas (related to the lost sense) can be rewired (due to neuroplasticity). For a blind person using one finger to read Braille, the brain area for that finger in the somatosensory cortex expands.