Heterotopia are nodules or clumps of misplaced neurons that did not move to the correct location in the brain during earlydevelopment. Heterotopia are common malformations of cortical development.
Other definitions: 1  Freshman: a student who has completed fewer than 30 credit hours. 2  Sophomore: a student who has completed 30 or more credit hours. 3  Part time: a student carrying fewer than 12 credit hours in a fall or spring semester.
How many credit hours of enrollment are required to be considered full-time? A student enrolled in 12 or more credit hours at the undergraduate level is considered a full time student. Graduate students enrolled in 9 or more credit hours of graduate level coursework are considered full time.