“Long-segment arachnoid cyst was compressing the girl’s dorsal ... where the affected muscles fail to receive signals from the brain—and also impacted her bladder and bowel control.

Medically reviewed by Sameena Zahoor, MDMedically reviewed by Sameena Zahoor, MD The meninges of the brain and spinal cord are three layers of membranes: the dura mater, arachnoid mater ...