page_title: Pallium (neuroanatomy)
hierarchical_section_title: Pallium (neuroanatomy)
caption_attribution_description: English: Schematic illustration of differences in neuronal specification and migration patterns between the mammalian and avian pallium. In the developing mammalian telencephalon, Reelin-positive neurons are derived from several origins including ventral pallium, and Er81 and Brn2-positive neurons are isotopically generated from entire pallial regions in a temporal manner. In contrast, in the developing avian telencephalon, Reelin-positive neurons are not derived from the ventral pallium, and Er81 and Brn2-positive neurons are generated from distinct pallial regions in a spatially regulated manner. Русский: Схематическая иллюстрация отличий процессов нейрональной спецификации и паттернов миграции у млекопитающих и птиц. В развивающемся конечном мозге млекопитающих, рилин-позитивные нейроны берут начало в нескольких областях включая вентральный паллиум, а Er81-и Brn2-позитивные нейроны изотопически генерируются по всему вентральному паллиуму, с разнесением по времени. Напротив, в развивающемся конечном мозге птиц, рилин-позитивные нейроны не генерируются вентральным паллиумом, а Er81- и Brn2-позитивные нейроны возникают в специфических участках паллиума, и этот процесс регулируется не временем, а пространственным положением.
context_page_description: In neuroanatomy, pallium refers to the layers of grey and white matter that cover the upper surface of the cerebrum in vertebrates. The non-pallial part of the telencephalon builds the subpallium. In basal vertebrates the pallium is a relatively simple three-layered structure, encompassing 3–4 histogenetically distinct domains, plus the olfactory bulb.
  It used to be thought that pallium equals cortex and subpallium equals telencephalic nuclei, but it has turned out, according to comparative evidence provided by molecular markers, that the pallium develops both cortical structures and pallial nuclei, whereas the subpallium develops striatal, pallidal, diagonal-innominate and preoptic nuclei, plus the corticoid structure of the olfactory tuberculum.
  In mammals, the cortical part of the pallium registers a definite evolutionary step-up in complexity, forming the cerebral cortex, most of which consists of a progressively expanded six-layered portion isocortex, with simpler three-layered cortical regions allocortex at the margins. The allocortex subdivides into hippocampal allocortex, medially, and olfactory allocortex, laterally.
context_section_description: In neuroanatomy, pallium refers to the layers of grey and white matter that cover the upper surface of the cerebrum in vertebrates. The non-pallial part of the telencephalon builds the subpallium. In basal vertebrates the pallium is a relatively simple three-layered structure, encompassing 3–4 histogenetically distinct domains, plus the olfactory bulb.
  It used to be thought that pallium equals cortex and subpallium equals telencephalic nuclei, but it has turned out, according to comparative evidence provided by molecular markers, that the pallium develops both cortical structures (allocortex and isocortex) and pallial nuclei (claustroamygdaloid complex), whereas the subpallium develops striatal, pallidal, diagonal-innominate and preoptic nuclei, plus the corticoid structure of the olfactory tuberculum.
  In mammals, the cortical part of the pallium registers a definite evolutionary step-up in complexity, forming the cerebral cortex, most of which consists of a progressively expanded six-layered portion isocortex, with simpler three-layered cortical regions allocortex at the margins. The allocortex subdivides into hippocampal allocortex, medially, and olfactory allocortex, laterally (including rostrally the olfactory bulb and anterior olfactory areas).
caption: Schematic illustration of differences in neuronal specification and migration patterns between the mammalian and avian pallium
exif: {}