GROSS ANATOMY

GROSS ANATOMY

BRAIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the 3 layers of the meninges is closest to the brain?
A
Dura Mater
B
Arachnoid Mater
C
Pia Mater
D
Serous Mater
Explanation: 

Detailed explanation-1: -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 .

Detailed explanation-2: -The dura mater is the outermost layer and is closest to the skull. It contains the periosteal layer and the meningeal layer. The arachnoid mater is in between the dura and pia mater. The pia mater is the innermost layer and is closest to the brain tissue.

Detailed explanation-3: -The innermost layer, the pia mater, is a thin and delicate membrane that lies on the surface of the brain. The second layer, the arachnoid mater, covers the brain and pia mater but does not follow the contour of the involutions of the brain.

Detailed explanation-4: -The meninges separate three spaces called the epidural space, subarachnoid space, and the subdural space. Each of these spaces contains some important blood vessels, rupture of which can cause headache. The epidural space is a potential space located between the inner surface of the skull and the tightly adherent dura.

Detailed explanation-5: -The most superficial layer of the meninges is the dura mater.

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