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Meningeal coverings

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The meninges (singular meninx) are the system of membranes that envelop the central nervous system. The meninges consist of three layers, the dura mater, the arachnoid mater, and the pia mater.

AnatomyEdit

The arachnoid and pia mater are sometimes together called the leptomeninges.

The subarachnoid space is the space that normally exists between the arachnoid and the pia mater, which is filled with cerebrospinal fluid.

Normally, the dura mater is attached to the skull in the head, or to the bones of the vertebral canal in the spinal cord. The arachnoid is attached to the dura mater, and the pia mater is attached to the central nervous system tissue. When the dura mater and the arachnoid separate through injury or illness, the space between them is the subdural space.

PathologyEdit

There are three types of hemorrhage involving the meninges:

Other medical conditions that affect the meninges include meningitis (a viral or bacterial infection). Meningiomas are tumors (generally benign) arising from the meninges. Malignant tumors formed elsewhere may also metastasize to the meninges.

ReferencesEdit

  1. Orlando Regional Healthcare, Education and Development. 2004. "Overview of Adult Traumatic Brain Injuries."



Meninges of the brain and medulla spinalis

Dura mater - Falx cerebri - Tentorium cerebelli - Falx cerebelli - Arachnoid mater - Subarachnoid space - Cistern - Cisterna magna - Median aperture - Cerebrospinal fluid - Arachnoid granulation - Pia mater

Deutsch (Meninges)

Deutsch (Subarachnoid space) es:Meninge fr:Méningeno:Hjernehinne pt:meninges

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