Inferior medullary velum

Inferior Medullary Velum

The Inferior Medullary Velum is a thin layer of neural tissue that forms part of the anatomy of the human brain. It is located within the fourth ventricle, a fluid-filled cavity in the brain, and is part of the cerebellum, the region of the brain responsible for coordinating voluntary movements.

Structure

The Inferior Medullary Velum is a thin, translucent membrane that stretches across the fourth ventricle. It is attached to the inferior cerebellar peduncle, a bundle of nerve fibers that connect the cerebellum to the brainstem. The velum forms the lower boundary of the fourth ventricle, separating it from the underlying medulla oblongata, a part of the brainstem that controls vital functions such as heart rate and breathing.

Function

The primary function of the Inferior Medullary Velum is to regulate the flow of cerebrospinal fluid (CSF) within the fourth ventricle. CSF is a clear, colorless fluid that surrounds the brain and spinal cord, providing protection and nutritional support. The velum acts as a kind of 'valve', controlling the amount of CSF that can enter and leave the ventricle.

Clinical significance

Abnormalities of the Inferior Medullary Velum can lead to a number of neurological conditions. For example, a tumor or other mass in this area can block the flow of CSF, leading to a condition known as hydrocephalus, which is characterized by an excessive accumulation of CSF in the brain. This can cause a range of symptoms, including headaches, nausea, vomiting, and cognitive difficulties.

See also

• Superior medullary velum
• Fourth ventricle
• Cerebellum
• Medulla oblongata