Structure
Ocular dominance columns are stripe shaped regions of the primary visual cortex that lie perpendicular to the orientation columns, as can be seen in the accompanying figure. Different species have somewhat different morphologies and levels of organization. For example, humans, cats, ferrets, and macaques all have fairly well defined columns, while squirrel monkeys have quite variable columns. There is even variation in expression in individuals of the same species and in different parts of the cortex of the same individual. The columns are innervated by input from the lateral geniculate nucleus (LGN) into cortical layer 4 and have mostly reciprocal projections to many other parts of the visual cortex.
Read more about this topic: Ocular Dominance Column
Famous quotes containing the word structure:
“... the structure of a page of good prose is, analyzed logically, not something frozen but the vibrating of a bridge, which changes with every step one takes on it.”
—Robert Musil (1880–1942)
“The verbal poetical texture of Shakespeare is the greatest the world has known, and is immensely superior to the structure of his plays as plays. With Shakespeare it is the metaphor that is the thing, not the play.”
—Vladimir Nabokov (1899–1977)
“If rightly made, a boat would be a sort of amphibious animal, a creature of two elements, related by one half its structure to some swift and shapely fish, and by the other to some strong-winged and graceful bird.”
—Henry David Thoreau (1817–1862)