Fig. 2
From: The craniocervical junction: embryology, anatomy, biomechanics and imaging in blunt trauma
Schematic of craniocervical junction developmental segmentation and resegmentation during embryogenesis. Abbreviations: OccSom1 - occipital somite 1; OccSom2 - occipital somite 2; OccSom3 - occipital somite 3; OccSom4 - occipital somite 4; CSom1 - cervical somite 1; CSom2 - cervical somite 2; CSom3 - cervical somite 3; CScler1 - cervical sclerotome 1; CScler2 - cervical sclerotome 2; BO - basiocciput; Bas - basion; OC - occipital condyles; FMalp - anterolateral foramen magnum and opisthion; Ataarch - anterior arch of C1 vertebra (atlas); Atparch - posterior arch of C1 vertebra (atlas); ApDens - apical segment of the dens; BaDens - basal segment of the dens; body of C2 vertebra (axis). Severed black line denotes the embryological separation between the cranial skull base and cervical spine during craniocervical junction development