The DNA and RNA of cells stain showing locations of neurons in gray mater and glia in white mater. Note arachnoid collapsed onto pia because of lost CSF pressure. Normally, the arachnoid is forced against the Dura because the formation is in the the subarachnoid space.

• The DNA and RNA of cells stain showing locations of neurons in gray mater and glia in white mater. Note arachnoid collapsed onto pia because of lost CSF pressure. Normally, the arachnoid is forced against the Dura because the formation is in the the subarachnoid space.