Spinal cord cord ends around the L1/L2 vertebral level, forming a structure known as the conus medullaris. Although the spinal cord cell bodies end around the L1/L2 vertebral level, the spinal nerves for each segment exit at the level of the corresponding vertebra. For the nerves of the lower spinal cord, this means that they exit the vertebral column much lower (more caudally) than their roots. As these nerves travel from their respective roots to their point of exit from the vertebral column, the nerves of the lower spinal segments form a bundle called the cauda equina. There are two regions where
Alan (given name) Alan (given name) Alan is a masculine given name in the English language. There are numerous differing etymologies attributed to the name. The name was first introduced into England by Bretons who took part in the Norman Invasion in the 11th century. Today there are numerous variations of "Alan", a short form, and there are also numerous feminine forms of the name as well. "Alan" has many forms in other languages. "Alan" is also an Old Breton personal name (from which the modern English "Alan" is ultimately derived), as well as being a Norman French name. "Alan" is a masculine