A dermatome is an area of skin supplied by a single spinal nerve. There are 31 pairs of spinal nerves, forming nerve roots that branch from your spinal cord, but only 30 dermatomes. Your spinal ...

This compression can occur anywhere along the spine, but it usually occurs in the lower, or lumbar, region. A pinched nerve can cause pain, tingling, or numbness in its corresponding dermatome.

At the lower end, the 11 lumbar, sacral, and coccygeal dermatomes are often grouped together as the lower extremity dermatomes. A spinal nerve root is a bundle of nerve fibers that branches off ...

Last month we discussed that the higher level (L1-L2, L2-L3 and L3-L4) lumbar disc herniations present significantly different than the more common lower level (L4-L5 and L5-S1) lumbar disc ...

Lumbar Spinal Stenosis: T2-weighted MRI of the Lumbar Spine; (Left) Mid-sagittal view; (Right Top) Axial scan at the mid-L3 level; (Right Bottom) Axial scan at the L3-L4 disk level. Note the central ...

Lumbar Spinal Stenosis: T2-weighted MRI of the Lumbar Spine. (Left) Mid-sagittal view; (Right Top) Axial scan at the L3 level; (Right Bottom) Axial scan at the L3-L4 disk level. Note the severe ...