Question 2 of 11

How many nerve cells are in the brain?

... Your brain is made up of approximately 100 billion nerve cells called neurons.

Question 3 of 11

What happens to a neuron if the cell body dies?

... The cell body contains all of the necessary components of the cell, so when the cell body dies, the neuron dies.

Question 4 of 11

What does a sensory neuron do?

... Sensory neurons carry signals from the outer parts of the body into the central nervous system. Motor neurons do the opposite, while interneurons connect various neurons within the brain and the spinal cord.

Question 5 of 11

What is the largest part of the human brain?

... The cerebrum is the largest part of the brain. Also called the cerebral cortex, it dominates the exterior surface of the brain.

Question 6 of 11

If you have Parkinson's disease, what part of the brain is affected?

... The midbrain contains a portion called the substantia nigra, which is involved in voluntary movements. When it doesn't function, you have the tremored movements of Parkinson's disease.

Question 7 of 11

What are the folds of the brain called?

... Gyri are the folds of the brain.

Question 8 of 11

If you're looking at a brain from above, what is the large groove that separates the right and left halves?

... The interhemispheric fissure separates the brain into left and right halves. The halves talk to each other through tracts of fibers known as the corpus callosum and the anterior commissure.

Question 9 of 11

What part of the brain receives input from all other parts of the brain to coordinate movements?

... The cerebellum receives sensory input from the spinal cord, motor input from the cortex and position information from the vestibular system. It then integrates this information and influences outgoing motor pathways from the brain to coordinate movements.

Question 10 of 11

If the section of the brain known as Wernicke's area were damaged, what might the result be?

... Wernicke's area processes the sensory information associated with language. Damage to this area results in sensory aphasia, in which patients can't understand language but can still produce sounds.

Question 11 of 11

What part of the cerebrum processes information related to touch and pain?

... The parietal lobe receives and processes input related to touch and pain, known as somatosensory input.

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