semispinal

sem·i·spi·nal

(sem'ē-spī'năl),
Half spinal; denoting muscles attached in part to the spinous processes of the vertebrae.
References in periodicals archive ?
The greater occipital nerve penetrates the semispinal iscapitis and trapezius muscles to innervate the skin along the posterior portion of the scalp to the vertex of the skull and the scalp over the ear and parotid glands.