Contribution to the topographical anatomy of the thorax in the foetus at term and the new-born child / by George S. Huntington.

  • Huntington, George S. (George Sumner), 1861-1927.
Date:
[1897?]
Catalogue details

Licence: Public Domain Mark

Credit: Contribution to the topographical anatomy of the thorax in the foetus at term and the new-born child / by George S. Huntington. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    The oesophageal surface in contact with the right mediastinal pleura grad- ually increases as the vein recedes. At the beginning of the lower third of the space the oesophagus has entirely replaced the vein in relation to the pleural leaf. In this situation the inferior oesophageal branches of the vagus are seen shining through the investing pleura (Fig. XXVIII, 4). Below the hilus and in front of the oesophagus is the prominent pos- terior and lateral wall of the intrathoracic segment of the inferior cava (Figs. XXVIII, 19, XXX, 24). Behind the oesophagus and azygos, covered by the costovertebral pleura, are seen the intercostal vessels, and more laterally the longitudinal strand of the sympathetic nerve. 2. Mediastinal Surface of Bight Lung (Figs. XX, XXII, XXIIa, XXIII). Boundaries: In front: anterior sharp margin. Below: mediastino-phrenic margin. Behind: internal margin. This surface of the lung is modelled on the mediastinal pleura covering the contents of the space, as above detailed, and accordingly presents a natural division into three fields of unequal extent and conformation. (1) Begion in Front of Hilus. a. Thymic area.—The upper third is formed by a smooth, slightly con- vex surface in apposition with the parietal pleura covering the lateral sur- face of the thymus gland {thymic area) (Figs. XX, XXII, XXIII, 3), and moulded over the form of this organ. The thymic area occupies the upper half of the medial surface of the upper lobe. b. Bericardial area.—The lower two-thirds of the anterior region include nearly equal portions of the upper and middle lobes, forming a concave surface (pericardial area) moulded over the prominence of the peri- cardium (Figs. XX, XXII, XXIII, 2). This area extends backward to the anterior margin of the hilus, and presents immediately in front of the latter a narrow, linear, nearly vertical furrow, resulting from its relation to the right phrenic nerve. The pericardial area is separated from the thymic surface by a moder- ately prominent blunt ridge, which corresponds to the furrow between the lateral surface of the thymus and the pericardium. (2) Begion of Hilus. a. Hilus.—Irregularly oval, with longest diameter in the long axis of the lung. The posterior border is nearly vertical; the anterior, convex. The upper extremity is blunt, quadrangular; the lower extremity pointed. The arrangement of the chief structures entering and leaving the lung at the hilus has been described above in detail. b. Surface above hilus presents in front a sharply defined vertical groove for the reception of the lateral surface of the right innominate and superior caval veins. (Figs. XX, XXII, XXIII, 4). The posterior bor- der of this groove, immediately above the hilus, is interrupted by the junc- tion of the caval depression with the deep groove lodging the terminal 22