Behind by the trapezius.
Floor of occipital triangle.
Below by the omohyoideus.
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.
This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas.
The roof is located superficially i e.
It is covered by the skin the superficial and deep fasciæ and by the platysma below.
Prevertebral fascia covering the floor of the posterior triangle.
The suboccipital triangle has three boundaries contained between a floor and roof.
Floor posterior arch of atlas and posterior atlantooccipital membrane ligament.
The roof of the triangle is from superficial to deep skin superficial and deep fascia.
Posterior atlanto occiptal membrane and posterior arch of the c1 vertebrae atlas cutaneous innervation over the triangle.
Floor roof of the suboccipital triangle.
Greater occipital nerve c2 dorsal ramus upper back of the skull.
Anterior formed by the posterior atlantooccipital membrane and posterior arch of the atlas 1.
Lesser occipital nerve cervical plexus lateral part of the back of the skull.
The occipital triangle the larger division of the posterior triangle is bounded in front by the sternocleidomastoideus.
Suboccipital muscles and contents of the suboccipital triangle.