SUBOCCIPITAL TRIANGLE

Norma occipitalis

Atlas

Axis

Muscles of the Back of NeckArranged in 4 layers (superficial to deep):First layerTrapezius

Second layerSplenius capitis

Third layerSemispinalis capitisLongissimus capitis12

Fourth layer4 musclesRectus capitis posterior majorRectus capitis posterior minorObliquus capitis superiorObliquus capitis inferior

Also called asSuboccipital muscles

1234

Suboccipital RegionBoundaries

Suboccipital TriangleBoundaries

RoofIII layer of muscles

FloorPosterior atlanto-occipital membranePosterior arch of Atlas

ContentsIII part of Vertebral arteryPosterior ramus of C1 nerveSuboccipital venous plexus

Contents

Vertebral Artery

C1 NerveSuboccipital nerveNo cutaneous branch

Suboccipital venous plexusOccipital vein , Internal vertebral venous plexus , condylar emissary vein and muscular veins

Suboccipital venous plexus

Vertebral veins

Greater occipital nerveThickest cutaneous nerve

Occipital artery

Applied AnatomyNeck rigidityCisternal PunctureSurgical approach for Posterior cranial fossa