NERVOUS SYSTEM SPECIAL SENSE
SPINALCORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The inner meningeal layer
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The outer meningeal layer
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The middle meningeal layer
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None of the above
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Detailed explanation-1: -Your pia mater, the innermost layer, is a thin layer that’s held tightly-like shrink wrap-to the surface of your brain and spinal cord. Many blood vessels pass through this layer to supply your brain tissue with blood. It also helps contain cerebrospinal fluid.
Detailed explanation-2: -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-3: -The pia mater is composed of two layers. The epipial layer is more superficial and contiguous with the arachnoid trabeculae, whereas the inner layer, the intima pia, is adherent to the adjacent neural tissue, following its contours. The pia dips between cerebral gyri and cerebellar folia.
Detailed explanation-4: -The pia is lined with epithelial layer towards the subarachnoid space. It is firmly bound to the nervous tissue by numerous astrocyte foot-processes. The pia mater is richly vascularized, arteries and veins enter the brain and the spinal cord from the pia. It contains numerous nerve fibers.