Dugwayâs Chemical Test Division successfully tests JCAD system on Stryker. Caged in a menacing looking metal grid with intricate sensory equipment attached to all sides the Armyâs M113 NBC RV Stryker vehicle sits on a dusty road at Dugway Proving Groundâs target S grid being readied by its crew for testing....
The following conditions are when secondary curvatures of the spine  develop:   Cervical-when the baby starts to hold its head up   Lumbar-when the baby starts to â¦ walk. 4 people found this useful.
You may see a couple of conditions related to excessive curvature: 1  Scoliosis is an abnormal lateral curvature and rotation of the spine. 2  Kyphosis (dowagerâs hump, or hunchback) is due to an excessively curved thoracic region of the vertebral column. 3  Lordosis is an excessive curve in the lumbar region.