The treatment of fractures . ebra. The lumbarenlargement commences at the level of the ninth dorsal vertebraand reaches to the twelfth dorsal vertebra. The spinal cord iswell protected from injury (see Fig. 71). The vertebrae commonly fractured are the fourth, fifth, andsixth cervical, the twelfth dorsal, and the first lumbar. Theinjury to the vertebrae is caused in one of three ways : by adirect blow upon the arches of the vertebrae, fracturing thearches ; by a fall upon either the head or the buttocks, crush-ing the bodies of the vertebrae ; or by forced flexion or exten-sion of the spine, c
The treatment of fractures . ebra. The lumbarenlargement commences at the level of the ninth dorsal vertebraand reaches to the twelfth dorsal vertebra. The spinal cord iswell protected from injury (see Fig. 71). The vertebrae commonly fractured are the fourth, fifth, andsixth cervical, the twelfth dorsal, and the first lumbar. Theinjury to the vertebrae is caused in one of three ways : by adirect blow upon the arches of the vertebrae, fracturing thearches ; by a fall upon either the head or the buttocks, crush-ing the bodies of the vertebrae ; or by forced flexion or exten-sion of the spine, causing a dislocation with or without fractureof the bodies and articular processes. More than one-half ofthe fractures of the cervical vertebrae arc fractures of the spinousprocesses. More than two-thirds of the cases of fracture of the 72 ANATOMY 73 dorsolumbar vertebrae are fractures of the bodies of those ver-tebrae. A dislocation without fracture may occur in the cervicalregion ; it is rare in other regions of the Pig- 69.—Palpating the bodies of the first and second cervical vertebrae through the mouth.
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