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[1] [20] One of the main dangers of increased ICP is that it can cause ischemia by decreasing CPP. Once the ICP approaches the level of the mean systemic pressure, cerebral perfusion falls. The body's response to a fall in CPP is to raise systemic blood pressure and dilate cerebral blood vessels. This results in increased cerebral blood volume ...
The anterior inferior cerebellar artery (AICA) is one of three pairs of arteries that supplies blood to the cerebellum.. It arises from the basilar artery on each side at the level of the junction between the medulla oblongata and the pons in the brainstem.
It supplies blood to the internal ear. Structure. The labyrinthine artery is a branch of either the anterior inferior cerebellar artery (AICA) or the basilar artery.
The middle ear is an air-filled space between the external and inner ears. it is separated from the outer ear canal by the eardrum, and connected to the nose and throat cavity by the Eustachian tube. Pressure in the middle ear should match the ambient pressure for normal functioning of hearing.
The parietal branch of the superficial temporal artery (posterior temporal) is a small artery in the head.It is larger than the frontal branch and curves upward and backward on the side of the head, lying superficial to the temporal fascia; it joins with its fellow of the opposite side, and with the posterior auricular and occipital arteries.
An alternative definition of CPP is: [1] = where: MAP is mean arterial pressure ICP is intracranial pressure JVP is jugular venous pressure. This definition may be more appropriate if considering the circulatory system in the brain as a Starling resistor, where an external pressure (in this case, the intracranial pressure) causes decreased blood flow through the vessels.
Considerable anatomic variation exists in the circle of Willis, with classic anatomy seen only in about one-third of people. [4] In one common variation the proximal part of the posterior cerebral artery is narrow and its ipsilateral posterior communicating artery is large, so the internal carotid artery supplies the posterior cerebrum; this is ...
The anterior auricular veins are veins which drain the anterior aspect of the external ear. [2] The veins drains to the superficial temporal vein. [3] See also.