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.
Straightening of cervical lordosis symptoms - What is straightening of the cervical lordosis? See below. Lordosis refers to the natural curve in your neck. You can see this when you get a lateral x-ray of your neck. When you are experiencing muscles spasms in your neck or if you have a poor posture, the normal curve in your neck will straighten out.