That depends on whether you mean back or spine. The middle spine is the thoracic region. Above it is the cervical, below the lumbar. Thoracic might also speak of the general middle region of the back.
The vertebral body of the vertebra is the scientific name for the middle. The spinal canal is anterior to it.
A scientific name for "the human spine" is called a "vertebrae."
Otitis medea.
Otitis medea.
A line is bisected at the mid-point anatomical middle is usually abdomen
Vertebrae.
Lumbago
Vertebrae = spine.
Its a Phrynosoma
Bipedal. The stress is on the middle syllable and it rhymes with see.
The vertebral column.
Brown Recluse