Below by the omohyoideus.
Floor of occipital triangle.
The suboccipital triangle has three boundaries contained between a floor and roof.
Behind by the trapezius.
Anterior formed by the posterior atlantooccipital membrane and posterior arch of the atlas 1.
It is covered by the skin the superficial and deep fasciæ and by the platysma below.
Lesser occipital nerve cervical plexus lateral part of the back of the skull.
Its floor is formed from above downward by the splenius capitis levator scapulæ and the scalenus medius and posterior.
Greater occipital nerve c2 dorsal ramus upper back of the skull.
Posterior and is formed by the semispinalis capitis muscle and a dense layer of adipose tissue 1.
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 of the triangle is from superficial to deep skin superficial and deep fascia.
The roof is located superficially i e.
Floor roof of the suboccipital triangle.
The suboccipital triangle floor is deep to the muscular triangle i e.
Floor posterior arch of atlas and posterior atlantooccipital membrane ligament.
Suboccipital muscles and contents of the suboccipital triangle.