Thickness (and leaves) A leaf is as thick as the width of one brick, but a wall is said to be one brick thick if it as wide as the length of a brick. Accordingly, a single-leaf wall is a half brick thickness; a wall with the simplest possible masonry transverse bond is said to be one brick thick, and so on.
Thecal sac is the layer that protects the spinal cord. It is filled with cerebrospinal Fluid and has numerous nerve roots Thecal sac is the layer that protects the spinal cord. It is filled with cerebrospinal Fluid and has numerous nerve roots. Thecal sac is enclosed in the Dura Matter. Dura matter is the outer layer which covers the central nervous system, which includes the brain and spinal cord 1. Thecal sac varies in both genders.
Thecal sac impingement is often noted on diagnostic imaging reports of people with various back pain and neck pain conditions. The thecal sac is the protective membrane which surrounds the spinal cord and other vital neurological structures.This membrane insulates and protects the nerve tissues, as well as holding cerebral spinal fluid, much like a reservoir.erniated disc displacing the thecal sac. In all cases, this means that the bulging portion of the disc is making contact to some degree with the thecal membrane and enacting some force against the side wall of the structure. This will produce a noticeable deformity which can be visualized on diagnostic imaging.