Chapter 5

In which brain areas do new neurons form in adults?

What class of chemicals prevents apoptosis?

At what age does a person have the greatest number of neurons- before birth, during childhood, during adolescence, or during adulthood?

Anesthetic drugs increase inhibition of neurons, blocking most action potentials. Why would we predict that exposure to anesthetics might be dangerous to the brain of a fetus?

Name two kinds of evidence indicating that touch information from the fingers activates the occipital cortex of people blind since birth.

Which brain area shows expanded representation of the left hand in people who began practicing stringed instruments in childhood and continued for many years?

When people claim that adolescents make risky decisions because of a lack of inhibition, which brain area do they point to as being responsible for inhibition?

What are the two kinds of stroke, and what causes each kind?

Why is tPA not helpful in cases of hemorrhage?

Is collateral sprouting a change in axons or dendritic receptors?

Is denervation supersensitivity a change in axons or dendritic receptors?

Many people with schizophrenia take drugs that block dopamine synapses. After prolonged use, the side effects include frequent involuntary movements. What is one possible explanation?

Suppose someone has suffered a spinal cord injury that interrupts all sensation from the left arm. Now he or she uses only the right arm. Of the following, which is the most promising therapy: electrically stimulate the skin of the left arm, tie the right arm behind the person's back, or blindfold the person?