dorzoponiran znači da nije u normalnom položaju već je oslabljen i nagnut unazad prema leđima

normoponiran znači da je u normalnom položaju

u engleskim referencama ne vidim "in posterior position" već najviše se frazira kao posterior disc bulging/protrusion

Approximately 90 percent of bulging discs occur in the lower back, or lumbar area, of the spine. The most common lumbar bulging disc is seen between lumbar vertebrae L4 and L5, and between vertebrae L5 and S1, causing pain in the L5 nerve or S1 spinal nerve, respectively.

https://www.laserspineinstitute.com/back_problems/bulging_di...

Posterior disc bulging L4 L5 level crushing indentation on thecal ...

https://www.spine-health.com/forum/discussion/46620/pain/low...

Posterior disc protrusion

Posterior disc protrusion refers to a spinal disc that has weakened and expanded backward from its normal position. When a disc protrudes, it may compress a nerve, causing irritation and inflammation. This nerve compression leads to pain and other symptoms.

https://www.laserspineinstitute.com/back_problems/disc_protr...

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Note added at 4 hrs (2017-12-17 09:17:33 GMT)
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Dorzalno (engl. Dorsal) – prema leđima
Ventralno (engl. Ventral) – prema trbuhu

http://www.portalnebula.hr/pojam/anatomski-smjerovi/