Atlas of Anatomy (Thieme Anatomy) by Gilroy Anne & MacPherson Brian

Author:Gilroy, Anne & MacPherson, Brian [Gilroy, Anne]
Language: eng
Format: epub
Publisher: Thieme New York
Published: 2012-04-09T00:00:00+00:00

Meninges

The brain and spinal cord are covered by membranes called meninges. The meninges are composed of three layers: dura mater (dura), arachnoid (arachnoid membrane), and pia mater.

The subarachnoid space, located between the arachnoid and pia, contains cerebrospinal fluid (CSF, see p. 632). See p. 40 for the coverings of the spinal cord.

Fig. 34.12 Layers of the meninges

See pp. 636–637 for the veins of the brain.

A Coronal section through the meninges, anterior view.

B Superior view of opened cranium. Left side: Dura mater (outer layer) cut to reveal arachnoid (middle layer). Right side: Dura mater and arachnoid removed to reveal pia mater (inner layer) lining the surface of the brain. Note: Arachnoid granulations, sites for loss of cerebrospinal fluid into the venous blood, are protrusions of the arachnoid layer of the meninges into the venous sinus system.

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