NEET PG DENTAL EXAM

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 arachnoid mater covering the brain is referred to as the “arachnoidea encephali, ‘’ and the portion covering the spinal cord as the “arachnoidea spinalis.” The arachnoid and pia mater are sometimes considered as a single structure, the leptomeninx, or the plural version, leptomeninges.

Detailed explanation-3: -The middle layer of meninges is arachnoid, a thin layer resembling a cobweb with numerous threadlike strands attaching it to the innermost layer. The space under the arachnoid, the subarachnoid space, is filled with cerebrospinal fluid and contains blood vessels.

Detailed explanation-4: -The potential space between the arachnoid and dura is called the subdural space and according to some authors, it contains a very thin layer of fluid. The space between the arachnoid and pia is called the subarachnoid space and it is filled with the cerebrospinal fluid (CSF).