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.
A full-time degree-seeking graduate student must be enrolled in at least 9 credit hours during the fall and spring semesters (6 credit hours during the summer term).