Which space within the spinal cord is located deeper?

The intrathecal space is indeed the deepest among the listed options. This space is located within the spinal canal and is surrounded by the arachnoid membrane and pia mater, which are the innermost layers of the meninges that protect the spinal cord. The intrathecal space contains cerebrospinal fluid (CSF), which serves various functions including cushioning the spinal cord, providing nutrients, and removing waste.

In contrast, the epidural space is situated outside the dura mater, forming a protective cavity that surrounds the spinal cord but does not penetrate the meninges. This space is commonly used for administering anesthetics during surgical procedures and for pain management, but it is more superficial than the intrathecal space.

The subdural space is located between the dura mater and the arachnoid membrane, which places it above the intrathecal space. While it is a potential space, it is not typically filled with significant amounts of fluid and is not used for therapeutic interventions in the same way.

The peridural space is another term often used interchangeably with the epidural space, emphasizing its positional relationship relative to the dura. Like the epidural space, it is also located outside the spinal canal and is not as deep as the