Corpus: Posterior spinal artery: Unterschied zwischen den Versionen
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==Definition== | ==Definition== | ||
The '''posterior spinal artery''' is a paired blood vessel that branches from the [[Corpus:Vertebral artery|vertebral artery]] and supplies the dorsal side of the [[Corpus:Spinal cord|spinal cord]]. | The '''posterior spinal artery''' is a paired [[Corpus:Blood vessel|blood vessel]] that branches from the [[Corpus:Vertebral artery|vertebral artery]] and supplies the dorsal side of the [[Corpus:Spinal cord|spinal cord]]. | ||
==Course== | ==Course== | ||
The posterior spinal arteries run caudally along the [[Corpus:Medulla oblongata|medulla oblongata]] and the spinal cord on both sides within the [[Corpus:Posterolateral sulcus|posterolateral sulcus]]. Their course can be discontinuous, with the artery on the opposite side compensating to maintain blood supply. These arteries receive additional blood flow from spinal branches that enter through the [[Corpus:Intervertebral foramina|intervertebral foramina]]. These branches originate from various arteries, including the [[Corpus:Ascending cervical artery|ascending cervical artery]], the [[Corpus:Deep cervical artery|deep cervical artery]], and [[Corpus:Segmental intercostal artery|segmental intercostal]] and lumbar arteries. | The posterior spinal arteries run caudally along the [[Corpus:Medulla oblongata|medulla oblongata]] and the spinal cord on both sides within the [[Corpus:Posterolateral sulcus|posterolateral sulcus]]. Their course can be discontinuous, with the artery on the opposite side compensating to maintain blood supply. These arteries receive additional blood flow from spinal branches that enter through the [[Corpus:Intervertebral foramina|intervertebral foramina]]. These branches originate from various arteries, including the [[Corpus:Ascending cervical artery|ascending cervical artery]], the [[Corpus:Deep cervical artery|deep cervical artery]], and the [[Corpus:Segmental intercostal artery|segmental intercostal]] and [[Corpus:Lumbar arteries|lumbar arteries]]. | ||
The posterior spinal arteries are connected to the [[Corpus:Anterior spinal artery|anterior spinal artery]] by numerous small transverse and longitudinal pial collateral vessels, forming a vascular network around each spinal cord segment known as the [[Corpus:Vasocorona medullaris|vasocorona medullaris]]. | The posterior spinal arteries are connected to the [[Corpus:Anterior spinal artery|anterior spinal artery]] by numerous small transverse and longitudinal pial collateral vessels, forming a vascular network around each spinal cord segment known as the [[Corpus:Vasocorona medullaris|vasocorona medullaris]]. | ||
Aktuelle Version vom 3. September 2024, 11:19 Uhr
Definition
The posterior spinal artery is a paired blood vessel that branches from the vertebral artery and supplies the dorsal side of the spinal cord.
Course
The posterior spinal arteries run caudally along the medulla oblongata and the spinal cord on both sides within the posterolateral sulcus. Their course can be discontinuous, with the artery on the opposite side compensating to maintain blood supply. These arteries receive additional blood flow from spinal branches that enter through the intervertebral foramina. These branches originate from various arteries, including the ascending cervical artery, the deep cervical artery, and the segmental intercostal and lumbar arteries.
The posterior spinal arteries are connected to the anterior spinal artery by numerous small transverse and longitudinal pial collateral vessels, forming a vascular network around each spinal cord segment known as the vasocorona medullaris.
Function
The posterior spinal arteries are responsible for supplying blood to the posterior horns and posterior columns of the spinal cord.