Posterior Curvature Of The Thoracic Spine

October 21, 2020

In this chapter an overall review of the posterior or posterolateral approach to the thoracic spine will be presented with the pertinent anatomic assessment. As part of the bony thorax the thoracic vertebrae help protect the internal viscera such as the heart lungs and oesophagus.

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Also called swayback the spine of a person with lordosis curves significantly inward at the lower back.

Posterior curvature of the thoracic spine. Excessive forward curvature of the thoracic spine may indicate a pathologic condition. An anteriorly concave curvature of the vertebral column. Muscular Anatomy The most superficial muscle of the dorsal spine is the trapezius muscle Fig.

The radius of curvature at a given point is the radius of a circle that mathematically best fits the spinal curve at that point. The thoracic spine normally has a mild kyphosis. The term kyphosis describes a normal posterior curved in the spine.

Surgical treatment is recommended for patients with spinal curves greater than 45º while still growing or greater than 50 º in those who have stopped. Posterior curvature of the thoracic vertebrae. 10 Thoracic facets are coronally oriented in the upper levels and become progressively more sagittal in orientation caudally down to T12.

This forward curvature is matched by reverse curvatures called lordosis or sway in the cervical spine the neck and the lumbar spine the low back. Using posterior tangents from L1 to L5 and T12 to S1 and Cobb angles at T12-S1 the lumbar curve reduced slightly by less than 33 degrees for all global angle measurements in anterior translation and reduced by 74 degrees 57 degrees and 81 degrees respectively in posterior thoracic translation. The thoracic spine is the second segment of the vertebral column located between the cervical and lumbar vertebrae.

34-1 which originates along the external occipital protuberance and each spinous process. The normal kyphoses of the thoracic and sacral regions are retained portions of the primary curvature kyphosis of the vertebral column. The cut surface of the pedicle is sealed with bone wax to reduce bleeding and to minimize contamination by tumor cells.

This can develop when osteoporosis causes weakening and erosion of the anterior portions of the upper thoracic vertebrae resulting in their gradual collapse Figure 722. It consists of twelve vertebrae which are separated by fibrocartilaginous intervertebral discs. See Thoracic Vertebrae and the Rib Cage.

Hyperkyphosis is an excessive degree to this curve that causes compaction and excessive wear and tear on discs vertebra. The thoracic rib cage portion of the spine has a normal forward curvature called kyphosis which has a normal range 20 to 50 degrees. Kyphosis also referred to as humpback or hunchback is an excessive posterior curvature of the thoracic region.

Lateral curvature of the vertebral column that usually occurs with some rotation of the vertebrae involving the thoracic and lumbar regions Define spina bifida Congenital lamina condition in which posterior aspects of the vertebrae fail to develop exposing part of the spinal cord usually at L5. A forward flexion curvature of the spine. With a reciprocating motion of the saw the pedicles are cut and then the whole posterior element of the spine the spinous process the superior and inferior articular processes the transverse process and the pedicle is removed in one piece.

The thoracic curvature is a primary spinal curve that develops during the embryonic period. Medical Dictionary 2009 Farlex and Partners. The thoracic spine has 12 vertebrae stacked on top of each other labeled from T1 down to T12.

Thoracic curvature were measured on the mid-sagittal plane. Performed on patients with a significant andor moderately progressing curvature of the thoracic and lumbar spines. These vertebrae form the foundation of the thoracic regions sturdy spinal column that supports the neck above the rib cage soft.

The thoracic and sacral regions of the spine normally have a kyphosis to them while the lumbar and cervical regions have the opposite curves a lordosis. Lordosis or swayback is an excessive anterior curvature of the lumbar region and is most commonly associated. Thoracic or Lumbar Posterior Spinal Fusion Surgery When the thoracic or lumbar vertebrae are unstable fractured or suffering from disease a posterior spinal fusion may be the medical solution.

The thoracic spine is naturally kyphotic due to the angulation of its vertebral bodies with a normal kyphotic curvature ranging from 20 to 50 degrees. There are three main types of spine curvature disorders including. This procedure fuses two or more spinal bones together to create a more stable spine using bone grafts and possibly instrumentation.

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