Atypical vertebra: L5

L5 is considered to be an atypical vertebra.  It is the largest and strongest lumbar vertebra.  Its notable feature would be the transverse processes are thick and fused to both the pedicle and the body.

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Superior view of L5 vertebra.  Annotated version here.  (Picture taken with a Hasselblad 120/4 on Aptus 65 back)
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Posterior view of L5 vertebra (Picture taken with a Hasselblad 120/4 on Aptus 65)
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Comparison between typical lumbar vertebra (Left) and L5 (Right).  (Picture taken with a Sony A7ii)

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