The innermost of the meninges; a delicate fibrous membrane closely enveloping the brain and spinal cord.
The innermost and most delicate of the three membranes covering the brain and spinal cord.
Innermost of the three meninges covering the brain and spinal cord (the other two being the dura mater and arachnoid); it is highly vascular and closely applied to the brain and spinal cord, nourishing the nerve cells.
The vascular and innermost of the three meninges covering the brain and spinal cord.
The membrane closely investing the brain and spinal cord, in which run blood vessels for the nourishment of these organs.
A thin vascular membrane closely investing the brain and spinal cord and proximal portions of the nerves. It is the innermost of the three meninges. The other portions of the covering are the dura mater and the arachnoid.
The innermost layer among the three membranes of the meninges, situated adjacent to the brain.
The innermost layer of the three membranes that envelop the brain and spinal cord.