| 释义 |
chorda Anat.|ˈkɔːdə|
Pl. chordæ |ˈkɔːdiː|.
[L.: see chord n.1]
A name for certain string-like structures in the animal body; with defining L. adj., as chorda dorˈsalis the notochord; chordæ tenˈdineæ pl., fine tendinous cords attaching the borders of the auriculo-ventricular valves to the papillary muscles of the heart; chorda tympani = tympanichord.
1807Morris & Kendrick Edin. Med. & Physical Dict., Chorda,..metaphorically used to signify a tendon or nerve. Ibid., Chordæ tendineæ, from the edge of the valves in the ventricles of the heart, there are tendinous strings thus named. Ibid., Chorda tympani. 1873G. Fleming tr. Chauveau's Comp. Anat. 905 There appear in the middle lamina of the blastoderm the chorda dorsalis, the vertebral laminæ, and the lateral laminæ. 1885Buck's Handbk. Med. Sci. I. 562 Long, fibrous chords, called chordæ tendineæ, that arise from pyramidal muscles. 1886Ibid. II. 328/2 A branch, named from its peculiar course, the chorda tympani. 1887Ibid. V. 248/2 The inner chorda sheath is lost. 1927Haldane & Huxley Animal Biol. iv. 97 One of the papillary muscles, attached by chordae tendineae to..the tricuspid valve between right auricle and right ventricle. 1952J. Drever Dict. Psychol. 37 Chorda tympani, a branch of the facial nerve, mostly sensory, carrying nerve impulses from taste receptors. 1962Gray's Anat. (ed. 33) 739 Their [sc. papillary muscles'] apices..give origin to the chordae tendineae, which pass to be attached to the segments of the tricuspid valve. Ibid. 1137 The chorda tympani nerve arises from the facial nerve about 6 mm. above the stylomastoid foramen. |