The presence of two or more unrelated disease conditions at the same time in the same person is referred to as comorbidity.

The hip-hop artist Pharell Williams used __________ as the basis for N.E.R.D. album "Seeing Sounds."

a. the law of pragnanz b. synesthesia c. perceptual adaptation d. grapheme-color association

Recent research has shown that maturity of which brain structure during young adulthood reflects cognitive changes that underlie expertise?

a. Temporal lobe b. Corpus callosum c. Frontal cortex d. Occipital lobe