[‚sem·i‚spī′nal·əs] (anatomy) One of the deep longitudinal muscles of the back, attached to the vertebrae.
semispinalis
semispinalis
S05-848940 (sĕm″ē-spī-năl′ĭs) [L.] The deep layer of muscle of the back on either side of the spinal column. It is divided into the following three parts: the semispinalis capitis, semispinalis cervicis, and semispinalis thoracis.