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In medicine and occupations concerned with physical fitness, the concept of good posture is referred to as "neutral spine". [7] In this context, proper posture or "neutral spine", is the proper alignment of the body between postural extremes. Deviations from neutral alignment are identified as excessive curvature or reduction in curvature.
Being less common than lumbar hyperlordosis [citation needed], hypolordosis (also known as flatback) occurs when there's less of a curve in the lower back or a flattening of the lower back. This occurs because the vertebrae are oriented toward the back of the spine, stretching the disc towards the back and compressing it in the front.
Flatback syndrome is a problem that develops in some patients treated with Harrington rod instrumentation, where the rod extends down into lower part of the lumbar spine. Because the Harrington cannot follow the natural lordosis of the lower back (i.e. the backwaist curve), the spine is straightened out into an unnatural position. At first, the ...
The upper cervical spine has a curve, convex forward, that begins at the axis (second cervical vertebra) at the apex of the odontoid process or dens and ends at the middle of the second thoracic vertebra; it is the least marked of all the curves. This inward curve is known as a lordotic curve. A thoracic spine X-ray of a 57-year-old male.
The vertebral column of australopith fossils also share the curved morphology of modern humans. Lordosis in the lower lumbar spine centers the mass of the body on the lower joints such as the pelvis and femur such that the body is self-stabilizing and can remain upright. [13] The earliest habitual bipeds of the hominins were Orrorin ...
This test is often used at schools and doctors' offices to check for scoliosis. The patient bends forward, as if they are diving. If the patient has scoliosis, their back often has a prominent line where the spine is, and one side is higher than the other. A patient's back is completely straight if they do not have scoliosis.
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In the sense of a deformity, it is the pathological curving of the spine, where parts of the spinal column lose some or all of their lordotic profile. This causes a bowing of the back, seen as a slouching posture. Kyphosis is distinguished from scoliosis, a condition in which the spine has a sideways curve.