51اسلاید Extends from foramen magnum to second lumbar vertebra Segmented Cervical Thoracic Lumbar Sacral Connected to 31 pairs of spinal nerves All are mixed nerves; I.e., contain both sensory and motor fibers Not uniform in diameter throughout length Cervical enlargement : supplies upper limbs Lumbar enlargement : supplies lower limbs Conus medullaris : tapered inferior end. Cauda equina : origins of spinal nerves extending inferiorly from lumbosacral enlargement and conus ...