Lateral recess

Lateral Recess

Diagram of the lateral ventricles, showing the lateral recess.

The lateral recess is a part of the ventricular system of the brain. It is an extension of the fourth ventricle, which is one of the interconnected fluid-filled cavities within the brain. The lateral recesses are located at the posterior part of the fourth ventricle and extend laterally towards the cerebellopontine angle.

Anatomy

The lateral recesses are two narrow, tube-like extensions that project from the fourth ventricle. They are situated on either side of the brainstem, near the pons and the medulla oblongata. The lateral recesses are bordered by the cerebellum and the choroid plexus, which is responsible for the production of cerebrospinal fluid (CSF).

Function

The primary function of the lateral recesses is to facilitate the flow of cerebrospinal fluid from the fourth ventricle into the subarachnoid space. This flow is crucial for maintaining the homeostasis of the central nervous system, providing cushioning for the brain, and removing metabolic waste.

Clinical Significance

Obstruction or malformation of the lateral recesses can lead to conditions such as hydrocephalus, where there is an accumulation of cerebrospinal fluid within the ventricles. This can cause increased intracranial pressure and may require medical intervention, such as the placement of a ventriculoperitoneal shunt.

Related Pages

• Ventricular system
• Fourth ventricle
• Cerebrospinal fluid
• Hydrocephalus