What is the function of the arachnoid mater in the brain?

Arachnoid mater: Connected to the dura mater on the side closest to the CNS, this middle layer includes a network of fibers and collagen that are part of the suspension system that helps protect the brain and spinal cord from sudden impact.

What is Supratentorial dura?

The supratentorial dura mater membrane is supplied by small meningeal branches of the trigeminal nerve (V1, V2 and V3). The innervation for the infratentorial dura mater are via upper cervical nerves and the meningeal branch of the vagus nerve.

What is the function of the pia mater?

Pia mater (soft inner layer of the dural membrane system) Vessels enter the brain from it. Furthermore, it creates the choroid plexus, a network of bold vessels, which enter the brain ventricles and produce the cerebrospinal fluid (CSF).

What is dura in spine?

The dura is a thin layer of tissue that covers and protects the spinal cord. It lies in between the spine (the bone) and the spinal cord (nerve tissue). Durotomy, which is an incision in the dura, can be a planned part of the surgical technique.

What happens if the arachnoid mater is damaged?

The subarachnoid space is prone to blood collection whenever there is damage to any of the cerebral blood vessels that travel beneath the arachnoid layer, in close proximity to the surface of the brain. Subarachnoid hemorrhages often occur spontaneously.

Is arachnoid mater highly vascular?

Unlike the dura mater, which receives a rich vascular supply from numerous arteries, the arachnoid mater and the deeper pia mater are generally non-vascular.

What is a supratentorial lesion?

Introduction Supratentorial mass lesions may produce neurological dysfunction by 2 mechanisms: Cerebral hemispheric damage from the primary lesion itself and secondary brainstem damage from displacement, tissue compression, swelling, and vascular stasis.

Where is a supratentorial tumor located?

Brain tumors located in the lobes are called supratentorial and tumors located in the cerebellum or brainstem are called infratentorial.

What happens if pia mater is damaged?

The pia mater allows blood vessels to pass through and nourish the brain. The perivascular space between blood vessels and pia mater is proposed to be part of a pseudolymphatic system for the brain (glymphatic system). When the pia mater becomes irritated and inflamed the result is meningitis.

What is pia in spinal cord?

The spinal pia mater (or pia mater spinalis) is the innermost layer of the spinal meninges. In congruence to the cranial pia being closely related to the surface of the brain, the spinal pia is closely related to the surface of the spinal cord.

What happens if dura mater is damaged?

If your spine still has a dural tear, your spinal cord will leak this cerebrospinal fluid over time. This results in symptoms that include: Spinal Headache – Severe headache that may disappear when laying down. Spinal Meningitis – Sensitivity to light, fever, fatigue, headache, vomiting, and possibly seizures.

Is dura part of spinal canal?

Gross Anatomy The spinal dura mater is a fibrous, non-adherent, tough layer surrounding the spinal cord. It is separated from the wall of the vertebral canal by the epidural space. This space contains loose areolar tissue and a network of internal vertebral venous plexuses.