O

All anatomy entries starting with "O"

15 entries

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15 entries · Brain & Spinal Cord

Brain Structure Obex obex Head & Skull The obex is the point at the lower tip of the fourth ventricle where it narrows…

Brain Structure Occipital Lobe lobus occipitalis Head & Skull The occipital lobe is the smallest lobe, forming the back of each hemisphere behind the parieto-occipital…

Brain Structure Occipital Pole polus occipitalis Head & Skull The occipital pole is the rounded back tip of each cerebral hemisphere. It contains the part…

Brain Structure Oculomotor Nucleus nucleus nervi oculomotorii Head & Skull The oculomotor nucleus is the motor nucleus of cranial nerve III, lying in the upper midbrain.…

Brain Structure Olfactory Bulb bulbus olfactorius Head & Skull The olfactory bulb is an oval swelling of brain tissue on the underside of each frontal…

Brain Structure Olfactory Striae striae olfactoriae Head & Skull At the back end of the olfactory tract, fibres split into the lateral and medial olfactory…

Brain Structure Olfactory Tract tractus olfactorius Head & Skull The olfactory tract is a narrow band of nerve fibres running backwards from the olfactory bulb…

Brain Structure Olive oliva Head & Skull The olive is an oval bulge on each side of the front of the medulla, just…

Brain Structure Opercula of the Insula opercula insulae Head & Skull The opercula are the 'lids' of cortex from the frontal, parietal and temporal lobes that fold…

Brain Structure Optic Chiasm chiasma opticum Head & Skull The optic chiasm is the X-shaped junction where the two optic nerves meet above the pituitary…

Brain Structure Optic Radiation radiatio optica Head & Skull The optic radiation, or geniculocalcarine tract, carries visual information from the lateral geniculate nucleus of the…

Brain Structure Optic Tract tractus opticus Head & Skull The optic tract continues from the back of the optic chiasm and curves around the cerebral…

Brain Structure Orbital Gyri gyri orbitales Head & Skull The orbital gyri form the underside of each frontal lobe, resting on the orbital plate of…

Brain Structure Orbitofrontal Cortex cortex orbitofrontalis Head & Skull The orbitofrontal cortex is the prefrontal cortex on the underside of the frontal lobes, above the…

Brain Structure Organum Vasculosum of the Lamina Terminalis organum vasculosum laminae terminalis Head & Skull The organum vasculosum of the lamina terminalis is a small circumventricular organ in the front wall…