I Have a Dream Speech

1. How do convolutions of a human brain compare with those of a rat or dog brain? * they are nearly identical despite major differences in the brain's internal structure * the human brain has many more convolutions * the lower animals have more convolutions and therefore fewer direct connections * human convolutions are less numerous, but larger * humans have frontal lobes, other animals do not 2. Bilateral symmetry... * is common in the animal kingdom * is unique to humans * is found only in old world primates, including humans * is apparently involved in the sense of equilibrium or balance * has been disproven by PET scans showing lateralization 3. How might lateralization contribute to a "control system" guiding activity, according to a decades-old theory? * the "minor" hemisphere is better at delicate, controlled action * if one side suddenly fails, the other can take over * oscillations between the two sides set up a rhythm of activity * the left hemisphere leads a person to take on challenges, the right hemisphere is associated with avoidance * the two sides allow people to balance in an upright position 4. What does "autonomic" mean? * automatic * emotional * regenerative * isolated * retroactive 5. PET scans... * are not quite as good as thermograms at showing detail * show only brain structures, not areas of activity * are made by rotating an X-ray machine around a patient's head * often use labeled glucose * have not lived up to early expectations 6. An axonal arborization looks somewhat like... * a button * a cake of many layers * a grape arbor, according to Cajal * a dendritic tree * a corn stalk 7. What does a lobotomy involve? * suction removal of brain tissue * removal