Full Ball & Socket Joint Description. [Continued from above] . . . In the shoulder joint, the spherical head of the humerus (upper arm bone) fits into the glenoid cavity of the scapula (shoulder blade). The glenoid cavity is a small and shallow cavity that permits the shoulder joint the greatest range of motion in the human body.
Lumbar lordosis refers to the inward curvature of the spine just above the buttocks. The National Institutes of Health reports that lordosis is caused by spondylolisthesis. Spondylolisthesis is a condition in which a spinal bone slips out of its normal space and onto the bone below it.
Lumbar and Cervical Lordosis. Lordosis describes the degree of front to back curvature in the neck and lower back. However, the name is also used as a diagnostic conclusion for an atypical curvature in either the lumbar or cervical spines of affected patients.ordotic pain may occur due to hyper or hypo versions of the condition in the neck or in the lumbar spine. Lordosis back pain is generally demonstrated in the lower lumbar zone. Military neck, also commonly called straight neck, describes overly straight posture due to a deficient cervical curvature.