Structure forming the Posterior 1/3 of veebral canal is (JIPMER May 2019)
At tip of spine of veebra there is Supra-Spinous Ligament Inter-Spinous Ligament b/w two spines & Ligamentous Flavum - ligament connecting lamina of veebral arch superiorly to next adjacent veebra (gives elasticity to veebral canal) forming post 1/3rd of veebral canal.
Posterior Longitudinal Ligament
Ligamentum Flavum
Posterior 1/3 of Veebral Body
Posterior 1/3 of Interveebral Disc
JIPMER 2019