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.
1 Thecal sac refers to the the sac which is a membrane (called dura mater) that contains the spinal cord and cerebrospinal fluid. 2  All this statement implies is that the disc bulge is contacting the membrane that contains the spinal cord.  3 minimal narrowing of the neuro foramina - probably you meant neural foramina. At each level in the spine where there is a disc, right and left nerve roots come out to innervate tissues in the body. 2  The holes that they come out are called neural foramina. 3  This statement means that the size, or diameter, of those holes has been minimally narrowed by this diffuse disc bulge.