ARTHROLOGY. 39 



/// the sac7'o-liimbar articulation the interarticular fibro-cartilage 

 is very thick, and the transverse process of the last lumbar articu- 

 lates with the external angles of sacrum. 



I'he fifth and sixth lumbar also articulate between their trans- 

 verse processes. 



The movements of the spine are — 



Flexion, extension and lateral jnotion, free in the cervical but 

 restricted in the other regions. 



ATLO-AXOID ARTICULATION. 



Odontoid and articular processes of axis to corresponding de- 

 pressions on atlas. 



Ligaments. 



Odontoid, from odontoid to inferior arch of atlas. 



Superior atlo-axoid, between spines. 



Inferior atlo-axoid, below bodies. 



Capsular ligaments (two), between articular processes. 



Action. 



Lateral rotation. 



OCCIPITO-ATLOID. 



Ligaments. 



Two capsular. 



Two lateral, from transverse process to occiput. 



Action. 



(Condyloid,) extension, flexion and lateral incHnation. 



TEMPORO-MAXILLARY. 



{Double condyloid Joint.) 



Ligaments. 



Capsular, from margins of glenoid cavity to neck of condyle of 

 inferior maxilla. 



Interarticular fibro-cartilage moulded on condyle. 



Two synovial membranes, one above, one below cartilage. 



Action. 



Depression, elevation, lateral motion and gliding. 



