Spinal veins
(Redirected from Venae spinales)
Spinal Veins[edit | edit source]
The spinal veins are a network of veins that drain the spinal cord and the surrounding structures. They are part of the venous system of the central nervous system and play a crucial role in maintaining the cerebrospinal fluid dynamics and intracranial pressure.
Anatomy[edit | edit source]
The spinal veins are divided into two main groups: the internal and external venous plexuses.
Internal Venous Plexus[edit | edit source]
The internal venous plexus is located within the vertebral canal and consists of anterior and posterior components:
- Anterior Internal Venous Plexus: This plexus is situated in front of the spinal cord and receives blood from the anterior spinal veins.
- Posterior Internal Venous Plexus: Located behind the spinal cord, it drains the posterior spinal veins.
These plexuses are interconnected and communicate with the dural venous sinuses in the cranial cavity.
External Venous Plexus[edit | edit source]
The external venous plexus surrounds the vertebrae and is divided into anterior and posterior parts:
- Anterior External Venous Plexus: Found on the anterior surface of the vertebral bodies, it drains into the vertebral veins.
- Posterior External Venous Plexus: Located on the posterior aspect of the vertebrae, it connects with the intercostal veins and lumbar veins.
Function[edit | edit source]
The spinal veins are responsible for draining deoxygenated blood from the spinal cord and the vertebral column. They also help in regulating the cerebrospinal fluid pressure by providing a pathway for the venous blood to exit the central nervous system.
Clinical Significance[edit | edit source]
The spinal veins can be involved in various pathological conditions such as:
- Spinal cord injury: Damage to the spinal veins can lead to hematoma formation and increased intracranial pressure.
- Spinal arteriovenous malformation: Abnormal connections between the spinal arteries and veins can cause neurological deficits.
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