On the mechanism of respiration / by Francis Sibson ; communicated by Thomas Bell.

  • Francis Sibson
Date:
1846
Catalogue details

Licence: Public Domain Mark

Credit: On the mechanism of respiration / by Francis Sibson ; communicated by Thomas Bell. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    PLATE XXIX. Illustrates the position of the ribs and the action of the external and internal inter- costal muscles in expiration and inspiration in Man. Fig. XIII. a.b. Are front views. Fig. XIV. a.b. Side views ; and Fig. XV. a.b. Dorsal views in the young and the adult man. In figs. XIII. a., XIV. a., XV. a., the lungs are flaccid (expiration). In figs. XIII. b., XIV. b., XV. b., the lungs are distended (inspiration). These views were taken by aid of a tracing frame (§ 4), and reduced by a penta- graph. These figures demonstrate that during inspiration (§§ 1.4) The five superior ribs, the thoracic set, approach each other. The four inferior ribs, the diaphragmatic set, recede considerably from each other . The sixth, seventh, and eighth ribs, the intermediate set, recede slightly from each other (§ 81). The dorsal arch is deepened and shortened (§^ 80.81). The external intercostals of the thoracic set of ribs are throughout inspiratory. The externa] intercostals of the diaphragmatic set are, in front, expiratory; behind, inspiratory. The external intercostals of the intermediate set are throughout inspiratory, being feebly so to the side (§ 85). The eighth external intercostal is behind inspiratory; to the side, expiratory; and in front, acting from the fixed on the floating cartilage, inspiratory. The internal intercostals are all expiratory behind. The internal intercostals are inspiratory between the costal cartilages of the tho- racic set of ribs. The internal intercostals are inspiratory between the ribs of the thoracic set in front, where they approach each other during inspiration. The internal intercostals between the diaphragmatic and intermediate sets of ribs, are throughout expiratory (§ 85). The following additional drawings, illustrative of the paper, are deposited in the Archives of the Royal Society. Fig. XIX. a.b. The female (§ 97), Fig. XXI. a.b. and fig. XXII. a.b. The child (§ 99), Fig. XXIII. a.b.c.d. The old man (§ 100), Fig. XXIV. The foetus, and
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