thoracic vertebra


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

thoracic vertebra

one of the 12 bony segments of the spinal column of the upper back designated T1 to T12 or D1 to D12. T1 is just below the seventh cervical vertebra (C7), and T12 is just above the first lumbar vertebra (L1). The thoracic part of the spine is flexible and has a concave ventral curvature. Each vertebra has a broad thick lamina; long, obliquely directed spinous processes; and thick strong articular facets. The thoracic vertebrae are unique in having small lateral facets for articulation with the ribs. The vertebrae are separated from each other by intervertebral disks. The vertebrae become thicker and heavier in descending order from T1 to T12. Compare cervical vertebra, lumbar vertebra, sacral vertebra.

thoracic vertebra

One of the 12 vertebrae that connect the ribs and form part of the posterior wall of the thorax.
See: spinal column for illus
See also: vertebra
References in periodicals archive ?
In a study in which the Dunn method and Shukla-Ferrara formula were compared, the catheter could be advanced along the vertebral column with a rate of 32% (6/19) in the Dunn group and 16% (4/25) in the Shukla-Ferrara formula group in second trials when a second catheter was inserted next to the first catheter when the first catheter could not be advanced along the thoracic vertebra and showed an abnormal position (7).
pH values of the muscle were measured 45 minutes and 24 hours post mortem behind the last thoracic vertebra using a portable pH-meter with puncture probe.
The penultimate thoracic vertebra is the only mobile vertebrae of the trunk in most birds and seems to be the weak point of the vertebral column because most trauma and infections occur at this location.
An adequate lateral view must include all seven cervical vertebrae and the cervicothoracic junction including the junction between the seventh cervical vertebra and the first thoracic vertebra as illustrated in Figure 1.
Each pair of ribs connects to a corresponding thoracic vertebra posteriorly.
During this time, the subcutaneous emphysema progressed from the xyphoid region anteriorly and to the 10th thoracic vertebra posteriorly.
Azygos vein is formed by the union of the ascending lumbar veins with the right subcostal veins at the level of the 12th thoracic vertebra, ascending in the posterior mediastinum, and arching over the right main bronchus at the root of the right lung to join the superior venacave.
The margins of the posterior portion of the cartonnage are visible under both hands and across the body of the eighth thoracic vertebra.
Taylor is unable to attend this year's Passport fashion fund-raiser, due to a compression fracture of the twelfth thoracic vertebra.
The left side was divided into shoulder, breast, pelvic limb (leg cut between the sixth and seventh lumbar vertebrae), neck (from the first to sixth cervical vertebrae), anterior-rib (from the seventh cervical vertebra to the fifth thoracic vertebra) and loin-rib (from the sixth thoracic vertebra to the sixth lumbar vertebra).
OBSERVATIONS: In present study, a fusion of typical thoracic vertebra between [T.
Adam broke his eighth thoracic vertebra, his right wrist, two fingers, and crushed his knees into his chest, causing massive thrombosis in his jugular vein.