The practice of obstetrics, designed for the use of students and practitioners of medicine . bones. Three lines of sutures run intoit. Not infrequently by reason of advanced ossification this fontanelle is absent. 412 PHYSIOLOGICAL LABOR. (3) The temporal joiUanellcs are found at the anterior and posterior extremities ofthe inferior border of each parietal bone (Fig. 533). They are irregular in shapeand resemble somewhat the occipital fontanelle, and may possibly be mistakenfor it during labor in cases of lateral obliquity of the fetal head (see Part V). (4) False jontanelles are occasionally
The practice of obstetrics, designed for the use of students and practitioners of medicine . bones. Three lines of sutures run intoit. Not infrequently by reason of advanced ossification this fontanelle is absent. 412 PHYSIOLOGICAL LABOR. (3) The temporal joiUanellcs are found at the anterior and posterior extremities ofthe inferior border of each parietal bone (Fig. 533). They are irregular in shapeand resemble somewhat the occipital fontanelle, and may possibly be mistakenfor it during labor in cases of lateral obliquity of the fetal head (see Part V). (4) False jontanelles are occasionally seen either along the line of a suture or inthe body of a bone, and are due to imperfect or irregular ossification. They rpaybe mistaken for the principal fontanelles. In my collection of 34 full-term skullswell-marked false fontanelles appear in 4 instances, or per cent.; in 2)Z pre-mature skulls in 5 instances, or per cent. (Fig. 439). Movements of the Fetal Head Upon the Spinal Column.—CompleteFlexion.—The head may so bend upon the childs chest that the chin and sternum. Fig. 536.—Diameters and Landmarks of the Fetal Skull. Anterior Surface. touch each other, giving the condition of complete flexion. The movement offlexion is really rotation of the head on a transverse axis. Incom,plete Flexion.—In certain cases when the head is at the pelvic brimand in the third or fourth vertex position, flexion is either partly or entirelywanting. Sometimes this condition results from the usual forces not exertingtheir normal degree of action. Imperfect vertical flexion in a flat pelvis willbe referred to again (Fig. 539). Extension.—Again, the head may be bent backward so that theoccipital protuberance touches the cervical spines without doing any injuryto the vessels or ligaments of the neck and giving the condition of completeextension (Fig. 539). These movements are believed to take place principallyin the cervical vertebras, the occipito-atlantoid articu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
