What is dura mater?
(DER-uh MAY-ter) The tough outer layer of tissue that covers and protects the brain and spinal cord and is closest to the skull. The dura mater is one of the three layers that form the meninges.
What is the function of the pia mater and dura mater?
Three layers of membranes known as meninges protect the brain and spinal cord. The delicate inner layer is the pia mater. The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. The tough outer layer is called the dura mater.
What’s the dura mater?
What does pia mater mean in Latin?
tender mother
Pia mater is medieval Latin meaning “tender mother”. The other two meningeal membranes are the dura mater and the arachnoid mater. The pia mater is a thin fibrous tissue that is permeable to water and small solutes. The pia mater allows blood vessels to pass through and nourish the brain.
What is in the dura mater?
The dura mater is the outermost layer of the meninges , lying directly underneath the bones of the skull and vertebral column. It is thick, tough and inextensible. Within the cranial cavity, the dura contains two connective tissue sheets: Periosteal layer – lines the inner surface of the bones of the cranium.
What is the main function of arachnoid mater?
Main function of the arachnoid mater – to circlate CSF . Subarachnoid space – separates the arachnoid mater from pia mater – mainly contains the CSF – surrounds the spinal cord – continues inferiorly and ends at the level of vertebra S2. lumber cistern
What fluid is contained in the arachnoid and pia mater?
Cerebrospinal fluid fills the ventricles of the brain and the space between the pia mater and the arachnoid. The primary function of the meninges and of the cerebrospinal fluid is to Meninges, three membranous envelopes-pia mater, arachnoid, and dura mater-that surround the brain and spinal cord.
What is above the dura mater?
Down the midline of the head between the Periosteal and the Meningeal (which makes up the Dura Mater) is a space called the Superior sagittal sinus. Above the Periosteal comes the skull bone, and above this the scalp, made up of the Periosteum and the Skin and hair.