Variability in the human M. spinalis capitis and cervicis: frequencies and definitions

摘要: The spinalis muscle is defined as the medial component of erector spinae group, and typically subdivided into three regional components: m. thoracis, cervicis capitis. Modern authorities, however, differ on morphology capitis portions many claim that these distinctions do not commonly exist. This article reports validity claim. Three morphological conditions are identified for both cervicis. distinct condition has persisting an independent muscular unit. blended occurs when fibers blend with those semispinalis muscle. Finally, there occasions in which no evidence can be found. Frequency estimates provided each conditions. Results statistical analyses indicate relationships among varieties sex individual or side body where was