190 



THE ARTICULATIONS AND LIGAMENTS UF THE HEAD 



Basilar groove 



Clivus 



Cranial dura mater 



Dura mater encephali 



Posterior or Icng ocoipito-axia 



ligament 1 

 Membrana tectoria 



Posterior com r=cn ligament 

 Lig. longitudinal posterius 



Anterior condylar foramen 



Canalis condyloideus 



_ Capsule of the occipito-atlantal 



synovial joint 



Capsula articulationis atlanto- 

 occipitalis 



Capsule of the atlanto-axial synovial 



joint 



Capsula articulationis atlanto- 

 epistrophicae 



Third cervical vertebra 

 Vertebra cervicalis III. 



1 See note to p. 177. 



FIG. 417. POSTERIOR OCCIPITO-AXIAL LIGAMENT. OCCIPITO-ATLANTAL AND ATLANTO-AXIAL 

 SYNOVIAL JOINTS. (THE THREE UPPERMOST CERVICAL VERTEBRA AND THE OCCIPITAL 

 BONE SEEN FROM BEHIND.) 



By a frontal section behind the occipital condyles, the squamous portion o/ the occipital bone and 

 the neural arches have been removed. The dura mater has been cut transversely in the basilar 

 groove, and turned upwards 



Anterior tubercle 



Tuberculum anterius 



Articular facet for the odontoid process 

 Fovea dentis 



Superior articular facet 

 Fovea articularis superior 



Transverse ligament of the atlas 

 Lig. transversum atlantis 



FIG. 418. TRANSVERSE LIGAMENT OF THE ATLAS. (THE ATL^S SEEN FROM ABOVE.) 



Articulationes atlanto-occipitaiis et atlanto-epistrophica Occipito-atlantal and atlanto-axial 



articulations. 



