The |rhomboideus major| and the rhomboideus minor form a flat, quadrilateral muscle of the upper back that lie under the |trapezius|. The muscles extend from the |spine| to the edge of the |scapula| (shoulder blade). They are barely separable as two muscles. These muscles assist in rotating the |scapula| and supporting the head. When you sneeze, the shoulder, back and abdominal muscles contract quickly to force ~air~ out of the nasal passages, while the rhombodeus major and minor muscles hold your head and neck steady.
