Question

choose the four normal spinal curvatures: a sacral b lumbar c pelvic d coccyx e cervical f thoracic

Explanation:

The four normal spinal curvatures are cervical (concave anteriorly), thoracic (convex anteriorly), lumbar (concave anteriorly), and sacral (convex anteriorly).

Answer:

A. Sacral, B. Lumbar, E. Cervical, F. Thoracic