Floor Of Occipital Triangle

The roof of the triangle is from superficial to deep skin superficial and deep fascia.

Floor of occipital triangle.

Behind by the trapezius. Floor posterior arch of atlas and posterior atlantooccipital membrane ligament. The suboccipital triangle floor is deep to the muscular triangle i e. Its floor is formed from above downward by the splenius capitis levator scapulæ and the scalenus medius and posterior.

Prevertebral fascia covering the floor of the posterior triangle. 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. Posterior and is formed by the semispinalis capitis muscle and a dense layer of adipose tissue 1. Greater occipital nerve c2 dorsal ramus upper back of the skull.

It is covered by the skin the superficial and deep fasciæ and by the platysma below. This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas. Lesser occipital nerve cervical plexus lateral part of the back of the skull. Anterior formed by the posterior atlantooccipital membrane and posterior arch of the atlas 1.

The suboccipital triangle has three boundaries contained between a floor and roof. The roof is located superficially i e. Suboccipital muscles and contents of the suboccipital triangle. The occipital triangle the larger division of the posterior triangle is bounded in front by the sternocleidomastoideus.