. The anatomy of the horse; a dissection guide. Horses. 156 THE ANATOMY OF THE HORSE. Action.—The riglit and left muscles, acting together, flex the head. When only one muscle acts, it inclines the head to the same side. The Scalenus (Plate 3 and Fig. 18). This muscle is situated on the side of the lower half of the neck. It arises from the transverse processes. Fig. 18. NUCH^ AND DEEP MUSCLES OF THE NeCK (C/« 1. Lamellar portion of the ligamentum nnchse; 2. Funicular portion of the same ; 3. Semispinalis of the back and loius ; 4. Semispinalis colli; 5. Rectus capitis postiois maj
. The anatomy of the horse; a dissection guide. Horses. 156 THE ANATOMY OF THE HORSE. Action.—The riglit and left muscles, acting together, flex the head. When only one muscle acts, it inclines the head to the same side. The Scalenus (Plate 3 and Fig. 18). This muscle is situated on the side of the lower half of the neck. It arises from the transverse processes. Fig. 18. NUCH^ AND DEEP MUSCLES OF THE NeCK (C/« 1. Lamellar portion of the ligamentum nnchse; 2. Funicular portion of the same ; 3. Semispinalis of the back and loius ; 4. Semispinalis colli; 5. Rectus capitis postiois major ; 6. Rectus capitis posticus minor; 7. Obliquus capitis inferior ; S. Obliquus cajiitis siiperior ; 0. Intertransversales colli; 10. Rectus capitis anticus major ; 11. External intercostal* ; 12. Upper and lower divisions of the scalenus. of the last four cervical vei-tebra3. In front of the 1st rib it is perforated by the roots of the brachial plexus, which there divide it into an upper and a lower portion. The first of these is much the smaller of the two, and it is inserted into the outer surface of the 1st rib near its upper end. The lower portion is inserted into the anterior border and outer surface of the same rib, the lowest fibres being immediately above the smooth impression left on the anterior border of the bone by the axillary vessels. Action.—To pull forwards or fix the 1st rib, and thus to aid in inspiration. When the rib becomes the fixed point, the muscles will flex the neck or incline it to the side, according as the right and left muscles act in concert or singly. The LoNGUs Colli (Plate 28). This muscle clothes the inferior face of the spinal column from the 6th dorsal vertebra to the atlas, the right and left muscles being closely united along the middle line, while at its outer edge each muscle is partially blended with the intertrans-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for re
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecthorses, bookyear1884
