The parvocellular part of a nucleus in the brain (if the nucleus has a parvocellular part) is that part which contains small-bodied, punctate neuronal cells. This term distinguishes the area from a corresponding magnocellular part, which would contain larger-bodied cells. More phylogenetically recent than magnocellular cells, sensitive to colour and can discriminate fine details. Nucleus usually refers to the center of something, but can mean: In science: Atomic nucleus, the collection of protons and neutrons in the center of an atom that carries the bulk of the atoms mass and positive charge Cell nucleus, the membrane-bound subcellular organelle found in eukaryotes, visible... In animals, the brain, or encephalon (Greek for in the head), is the control center of the central nervous system. ... Drawing by Santiago Ramón y Cajal of neurons in the pigeon cerebellum. ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell. Cells in culture, stained for keratin (red) and DNA (green). ... This article needs cleanup. ...