- Kidney Shaped broad Body
- Ring epiphysis- outer rim elevated
- Inner part depressed
- Typical Lumbar- first 4
- Atypical Lumbar 5th
- Kidney shaped body
- broad
- Outer rim elevated- ring epiphysis
- Inner part is depressed
- 1st 4- typical- lumbo sacral angle is formed by the intervertebral disc
- 5th lumbar- atypical
- 4 surfaces-
- Superior
- Inferior
- Anterior
- Posterior- with foramen for Basi vertebral veins
- No facets. Transverse process is thick, especially in 4th and 5th.
- Elevations in bottom of transverse process- Accessory process
- Mamillary and accessory process are present in all typical lumbar vertebrae and erector spinae muscle are attached to it
- Superior articulating facet faces medially
- 5th lumbar-
- Atypical
- Concavity in anterior surface
- Forms the lumbo-sacral angle
- Lumbarisation-
- Sacral vertebrae comes out and acts as a separate lumbar vertebrae
- Sacralisation-
- Last lumbar is attached to sacrum
- Superior and inferior articulating facets.
- Superior articulating facet has an extra tubercle like structure on upper- mamillary process
- Spine is less oblique
- Spinous process is thick
- Intervertebral foramen present
- Ligamentum flava attached at the posterior aspect