title: Neuroanatomical asymmetry in the telencephalic hemispheres of the frog Rana esculenta.
abstract: The frog's brain postfixed with osmium tetroxide and stained with uranyl acetate was examined for asymmetries. Examination with the light microscope of serial semithin sections of the telencephalon revealed a nucleus of dark cells located in the lateral cortex of only the left hemisphere in a region close to the 'porcion arqueada' of Pedro Ramón y Cajal. Electron microscopy of ultrathin sections suggests that the cells of this asymmetric nucleus are neurons with a coarse cytoplasmic texture, where large inclusions occur, and with broad cisternae of endoplasmic reticulum.
mesh_terms: D000818:Animals; D008854:Microscopy, Electron; D011893:Rana esculenta / Q000033:anatomy & histology*; D013687:Telencephalon / Q000033:anatomy & histology* / Q000648:ultrastructure