Floor Of Occipital Triangle

Posterior and is formed by the semispinalis capitis muscle and a dense layer of adipose tissue 1.
Floor of occipital triangle. Anterior formed by the posterior atlantooccipital membrane and posterior arch of the atlas 1. Posterior atlanto occiptal membrane and posterior arch of the c1 vertebrae atlas cutaneous innervation over the triangle. This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas. Greater occipital nerve c2 dorsal ramus upper back of the skull.
Below by the omohyoideus. Prevertebral fascia covering the floor of the posterior triangle. Its floor is formed from above downward by the splenius capitis levator scapulæ and the scalenus medius and posterior. Lesser occipital nerve cervical plexus lateral part of the back of the skull.
The semispinalis capitis occasionally splenius capitis levator scapulae and middle scalene and posterior muscles line the floor of the occipital triangle in that craniocaudal order. The roof is located superficially i e. The suboccipital triangle has three boundaries contained between a floor and roof. The suboccipital triangle floor is deep to the muscular triangle i e.
Behind by the trapezius. Floor roof of the suboccipital triangle. Floor posterior arch of atlas and posterior atlantooccipital membrane ligament. The occipital triangle the larger division of the posterior triangle is bounded in front by the sternocleidomastoideus.