There are 5 lumbar vertebrae in the lumbar region. There are 5 sacral vertebrae, which are fused as one bone and known as the sacrum, in the sacral region. There are 3 to 5 coccygeal vertebrae, which ...

That’s because the spinal nerve highest in your neck, called cervical 1 (C1), doesn’t provide sensory function. The lumbar, sacral, and coccygeal dermatomes are often grouped together and ...