Floor Of Occipital Triangle

The occipital triangle the larger division of the posterior triangle is bounded in front by the sternocleidomastoideus. The roof of the triangle is from superficial to deep skin superficial and deep fascia. This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas.

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Suboccipital muscles and contents of the suboccipital triangle.

Floor of occipital triangle.

The roof is located superficially i e. Its floor is formed from above downward by the splenius capitis levator scapulæ and the scalenus medius and posterior. The suboccipital triangle has three boundaries contained between a floor and roof. Anterior formed by the posterior atlantooccipital membrane and posterior arch of the atlas 1.

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. Lesser occipital nerve cervical plexus lateral part of the back of the skull. The suboccipital triangle floor is deep to the muscular triangle i e.

Below by the omohyoideus. Behind by the trapezius. It is covered by the skin the superficial and deep fasciæ and by the platysma below. Posterior atlanto occiptal membrane and posterior arch of the c1 vertebrae atlas cutaneous innervation over the triangle.

Floor posterior arch of atlas and posterior atlantooccipital membrane ligament. Greater occipital nerve c2 dorsal ramus upper back of the skull. Floor roof of the suboccipital triangle. Posterior and is formed by the semispinalis capitis muscle and a dense layer of adipose tissue 1.

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