The posterior communicating artery PCom is larger than the P1 segment of the posterior cerebral artery PCA and supplies the bulk of the blood to the PCA. A fetal origin of the posterior cerebral artery is a common variant in the posterior cerebral circulation estimated to occur in 20-30 of individuals 2.
Posterior Cranial Fossa Wikipedia
The brainstem is responsible for controlling vital body functions such as breathing.
. The posterior fossa is a small space in the skull found near the brainstem and cerebellum. The cerebellum is the part of the brain responsible for balance and coordinated movements. Plural fossae ˈ f ɒ s iː or ˈ f ɒ s aɪ.
The fossa is located behind the zygomatic process of the frontal bone in the anterior and. From Latin fossa ditch or trench is a depression or hollow usually in a bone such as the hypophyseal fossa the depression in the sphenoid bone. Fossa for the lacrimal gland A depression in the frontal bone in which rests the orbital portion of the lacrimal gland as well as some orbital fat which itself lies in the posterior part of the fossa called the accessory fossa of Rochon-Duvigneaud.
In anatomy a fossa ˈ f ɒ s ə. The fossa ovalis is a depression in the right atrium of the heart at the level of the interatrial septum the wall between right and left atriumThe fossa ovalis is the remnant of a thin fibrous sheet that covered the foramen ovale during fetal development. If bilateral the basilar artery is significantly smaller than normal.
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