Posterior spinal veins

Posterior Spinal Veins

Diagram of the spinal veins, including the posterior spinal veins.

The posterior spinal veins are a network of veins located on the dorsal aspect of the spinal cord. These veins are part of the venous drainage system of the spinal cord and play a crucial role in maintaining the circulatory system of the central nervous system.

Anatomy

The posterior spinal veins are situated on the posterior surface of the spinal cord. They are part of the spinal venous plexus, which includes both the anterior and posterior spinal veins. The posterior spinal veins run longitudinally along the spinal cord and are interconnected by transverse anastomoses.

The veins are typically paired and run parallel to the posterior spinal arteries. They drain the dorsal horn of the spinal cord and the surrounding meninges. The posterior spinal veins eventually drain into the internal vertebral venous plexus, which is located in the epidural space of the vertebral column.

Function

The primary function of the posterior spinal veins is to facilitate the drainage of deoxygenated blood from the spinal cord. This is essential for maintaining the homeostasis of the spinal cord and ensuring that metabolic waste products are efficiently removed.

The venous blood from the posterior spinal veins is collected into the internal vertebral venous plexus, which then drains into the systemic circulation via the intervertebral veins and ultimately into the superior vena cava.

Clinical Significance

The posterior spinal veins, along with the rest of the spinal venous system, can be involved in various pathological conditions. For instance, spinal cord edema or venous congestion can occur if there is an obstruction in the venous drainage pathways. This can lead to neurological deficits due to increased intracranial pressure or ischemia of the spinal cord.

In some cases, spinal arteriovenous malformations (AVMs) can involve the posterior spinal veins, leading to abnormal connections between the arterial and venous systems. This can result in hemorrhage or spinal cord compression.

Related Pages

• Spinal cord
• Venous drainage of the brain
• Spinal arteries
• Internal vertebral venous plexus
• Spinal cord injury