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The normal functioning network of blood vessels is responsible for transporting air and all kinds of caloric agents to the brain. The two sets of vessels that provide blood to the scalp, face, and brain are the left and right vertebral arteries and the left and right carotid arteries. The carotid arteries have two divisions Internal carotid artery artery Provides blood to the front 3 quints. the cerebrum (excluding the occipital and transverse lobes); External carotid artery artery supplies blood to the scalp and face. The vertebral artery provides blood to the small brain. the posterior two-fifths of the cerebrum They are present in the small brain and brainstem.
What are the posterior cerebral arteries?
The carotid and the anterior vestibular arteries form a circle that communicates the arteries to the cause of the brain. This circle is called the circle around Willis. From this circle, all other arteries are created. the posterior cerebral artery (PCA), the middle cerebral artery (MCA) and anterior cerebral artery (ACA). All these arteries extend into the brain and cover the entire matrix. The vertebral artery branches of the posterior inferior cerebellar artery (PICA). If the carotid artery flows into the brain due to the formation of a circle between the carotid and carotid arteries, the cerebellar artery arteries can cause the brain artery During this time, the artery from which blood is supplied (the distal minimal artery) can receive blood from other arteries. This is called collateral circulation and functions through another circulatory channel to prevent ischemia.
The basilar artery Branching into the central cerebral space, 2 posterior cerebral arteries. Both arteries travel the cerebral piennosi and branches of the central brain form an area of delicate, long permeating arteries that cause blood supply to the thalamus and hypothalamus. The hypothalamus is still partially surrounded by the Willis and can provide extra blood to the hypothalamus with the help of its own perforators from other barrels.
PCA Segment
- P1 Sector: this sector is extended from the bottom endpoint artery and extends to the end to posterior communicating artery (thus covering the entire area of the intercorrosive tank).
- Segment P2: then ascends the posterior communicating artery around the central brain and is divided into two main sub-segments. Just as in P2P posterior P2A is the front; P2A is located in Cisterna Cruris and is connected to P2P in that area. That is why it is also called the environmental sector of the medical literature.
- P3 Segment: It is also called the Quadrafemoralis Sector because it is located in Cisterna Quadrafemoralis.
- P4 Sector: it is called the Cortical Sector. For example, in what quantity, calcarine artery It is located in the calc bone fissure.
Branches of PCA
- Lateral posterior choroidal arteries
- Medial posterior choroidal arteries
- Posterior communication artery
- PERPERPERORATORS: bypass (short and long), adhesive perforators (from P2), thalamogenic perforators (which extend from P2), posterior thalamic foramen (from P1), frontal foramen tamopa (from P1). posterior communicating artery )
- Medial occipital artery : Parieto-occipital artery , Calcarine artery
- Lateral occipital artery Posterior temporal artery , middle inferior temporal artery and inferior frontal temporal. artery
- Temporal branches: posterior temporal artery , Anterior temporal artery
- Splenial artery
Function of posterior cerebral arteries
Posterior cerebral artery It is responsible for the blood supply to the cerebellum, the brainstem, the lower regions of the temporal dolons, and the center of the occipital dolons. This area connects the Calcaneale cortex, often known as the primary visual cortex. The smallest branch of posterior cerebral artery passes blood to the central brain, areas of the visual pathway, the thalamus, and the hippocampus.
The PCA contains the central space of the brain and forms the lower lobes of the circle of Willis. This network of arteries still connects the frontal and posterior arteries, but also anterior to the internal carotid cerebral , middle cerebral arteries. This beautiful network of arteries transports oxygen-rich blood to all the different parts of the brain.
Stroke in the posterior cerebral artery
Posterior cerebral artery Stroke is seldom compared to a heart attack due to damage to the anterior blood circulation. An inadequate blood supply to any part of the brain can lead to an ischemic stroke. The metabolism of neurons can only endure a brief phase of inadequate glucose and air, after which irreversible damage occurs. Cell death occurs after about 6 minutes after the blood supply is inadequate. Ischemia occurs initially in large cortical neurons where metabolism is more functional. An infarct consists of an umbra or central region with maximum cell death and is surrounded by a half layer of tissue containing surprise cells that have a chance to revive if circulation is generated or restored by security.
Symptoms
A continuous course of PCA can lead to sensory and visual arrest; patients with PCA infarcts are less likely to feel an acquired handicap as opposed to the front of the body cerebral basal or central line of the brain. cerebral infarctions.
Clinical signs and symptoms associated with closure posterior cerebral artery It depends mainly on the occlusal space. These signs have a good chance of occurring.
- Hallucinations.
- Verbal dyslexia.
- Inability to see movement.
- Daltonism
- hemianopsia
- Contralateral hemianopsia
- Weber’s syndrome
- Thalamic perforation syndrome
- Thalamus syndrome
Brain functions affected
Stroke can affect the posterior cerebral artery It can also cause occipital cortex and alexia. This is characterized by the inability to recite. These strokes can affect visual spatial orientation, visual discrimination, and visual learning. Strokes. the posterior cerebral artery The brainstem and cerebellum may still be affected, resulting in unclear and slow speech. This situation is called dysalmia. It occurs as a result of shattered nerves affecting the muscles involved in jaw and tongue control. In most cases, the result is distorted. In other words, only half of the brain collides. The likelihood of these symptoms is high:
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