Now available in the NYSORA Nerve Blocks App: Greater Occipital Nerve Block The greater occipital nerve sits deep, with subtle landmarks and little margin for error. Success depends on reading ultrasound correctly - and knowing exactly what you’re looking at. NYSORA’s Reverse Ultrasound Anatomy (RUA) bridges that gap by placing ultrasound images into clear anatomical context. You see where the nerve lies between the obliquus capitis inferior and semispinalis capitis, how to choose a safe needle