Floor Of Occipital Triangle

Prevertebral fascia covering the floor of the posterior triangle. The occipital triangle the larger division of the posterior triangle is bounded in front by the sternocleidomastoideus. Its floor is formed from above downward by the splenius capitis levator scapulæ and the scalenus medius and posterior.

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Floor roof of the suboccipital triangle.

Floor of occipital 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. The suboccipital triangle floor is deep to the muscular triangle i e. It is covered by the skin the superficial and deep fasciæ and by the platysma below. The roof is located superficially i e.

Behind by the trapezius. Suboccipital muscles and contents of the suboccipital triangle. 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.

Posterior and is formed by the semispinalis capitis muscle and a dense layer of adipose tissue 1. Lesser occipital nerve cervical plexus lateral part of the back of the skull. Floor posterior arch of atlas and posterior atlantooccipital membrane ligament. Below by the omohyoideus.

Greater occipital nerve c2 dorsal ramus upper back of the skull. This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas. Posterior atlanto occiptal membrane and posterior arch of the c1 vertebrae atlas cutaneous innervation over the triangle. The roof of the triangle is from superficial to deep skin superficial and deep fascia.

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