medulla spi·na·lis /-ˌspaɪˈneləs/ 名詞
脊髓
medulla spinalis
n : a major part of the central nervous system which conducts
sensory and motor nerve impulses to and from the brain; a
long tube-like structure extending from the base of the
brain through the vertebral canal to the upper lumbar
region [syn: spinal cord]