Physiology and biochemistry in modern medicine . I, 2, .?, trilobate expansions of tendinous center of diaphragm; 4, 5,costal portions, right and left, of diaphragm muscle; 6, right cms of diaphragm; S, 9, internalintercostal muscles, which are absent near the vertebral column, where it joins 9 and 9, the ex-ternal intercostals; 10, 10, subcostal muscles of left side. (From Luschka.) contributory factor in reducing the vital capacity of an individual whenlying on the back. Figures given by Hutchinson for the effect whichposture has on the vital capacity are of interest because of their bearing
Physiology and biochemistry in modern medicine . I, 2, .?, trilobate expansions of tendinous center of diaphragm; 4, 5,costal portions, right and left, of diaphragm muscle; 6, right cms of diaphragm; S, 9, internalintercostal muscles, which are absent near the vertebral column, where it joins 9 and 9, the ex-ternal intercostals; 10, 10, subcostal muscles of left side. (From Luschka.) contributory factor in reducing the vital capacity of an individual whenlying on the back. Figures given by Hutchinson for the effect whichposture has on the vital capacity are of interest because of their bearingon the cause of orthopnea. In the same individual he found the followingvital capacities: Standing 4300 Sitting 4200 Supine 3800 Prone 3620 THE MECHANICS OP RESPIRATION 319 The Action of the Musculature of the Ribs In a general way, the external intercostal muscles may be considered as a broad extension of the scalene muscles over the thoracic walls, withthe ribs as intersections. The scalcni serve to fix the position of the. Fig. 113.—Intercostal muscles of 5th and 6th spaces. A, side view; B, back view; IV, 4thdorsal vertebra; V, 5th rib and cartilage; J, /, M. levatores costarum, 2, 2, external intercostals;3, 3, internal intercostals, exposed by removal of the external muscles. In A, there are no externalintercostals in the intercartilaginous spaces; in B there are no intercostals near the vertebralcolumn. (From Allen Thomson.) first rib so that it forms an anchorage for the action of the externalintercostal muscles in raising the lower ribs. They also raise the upperthree pairs of ribs along with the manubrium and sternum. The function of the intercostal muscles has been the subject of much
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectphysiology
