A physician must administer an anesthesia directly to the CNS via the vertebral column. How many layers of the meninges must be punctured to do so?

A) Two layers to introduce the anesthesia to the subarachnoid space
B) None to introduce the anesthesia to the epidural space
C) One layer to introduce the anesthesia to the subarachnoid space
D) Three to introduce the anesthesia directly to the spinal cord

Subarachnoid Space

The area between the arachnoid membrane and pia mater around the brain and spinal cord, filled with cerebrospinal fluid, providing cushioning and transport of nutrients.

Epidural Space

A fat-filled space surrounding the spinal cord that provides a protective cushion and houses nerves and blood vessels.

Meninges

Three protective membranes that envelop the brain and spinal cord, comprising the dura mater, arachnoid mater, and pia mater.