Orbital grooves ( lat.sulci orbitales ) - grooves on the basal (lower) surface of the hemispheres in the frontal lobe of the end brain .
| Orbital grooves | |
|---|---|
 The orbital surface of the left frontal lobe, a typical pattern of the orbital fissures in the form of the letter "H" | |
| Part | Frontal lobe |
| Catalogs | |
Outside the olfactory groove, the lower surface of the frontal lobe is covered with grooves that are variable in shape, which most often form a combination in the form of the letter “H” and are designated as orbital (or orbital) grooves. Some authors call the transverse groove, usually forming the crossbar of the letter “H”, the transverse orbital (orbital) furrow ( lat. Sulcus orbitalis transversus ), and the longitudinal grooves extending from it, the lateral and medial orbital (orbital) furrows ( lat. Sulci orbitales lateralis et medialis ). Between the orbital grooves are four [2] [3] .
Content
Morphology and clinical significance
The number, shape and pattern of orbital fissures varies in different people. The medial, lateral and transverse ocular grooves form a pattern resembling the outlines of the letter “H”, “X” or “K”. These grooves divide the orbitofrontal cortex into four main gyruses: the medial, lateral, anterior and posterior orbital (orbital) gyrus. There are three main types of orbital fissure patterns observed in humans and in macaques ; more complex patterns are observed only in humans and they are associated with the presence of additional orbital fissures [4] . In patients with schizophrenia and schizotypic disorder , a significantly lower number of orbital fissures was found compared with the control group of healthy people [5] .
Additional Images
Lower projection of the frontal lobe
Lower brain projection
Notes
- ↑ 1 2 Foundational Model of Anatomy
- ↑ Furrows and convolutions of the brain, cerebral hemispheres // Big Medical Encyclopedia / Ch. ed. B.V. Petrovsky . - 3rd ed. - M .: Soviet Encyclopedia , 1980. - T. 3. - S. 339.
- ↑ Haines, Dwayne. Neuroanatomy: an atlas of structures, sections, and systems / Per. from English Ph.D. M.Yu. Bobylova. - 6th. - Moscow: Logosphere, 2008. - ISBN 978-5-98657-014-3 .
- ↑ Orbitofrontal sulci of the human and macaque monkey brain . PubMed (June 19, 2000).
- ↑ Decreased number of orbital sulci in schizophrenia spectrum disorders (English) . PubMed (April 30, 2016).
Links
- BrainInfo article