| 单词 | concentric contraction |
| 释义 | > as lemmasconcentric contraction concentric contraction (a) Physiology the type of muscular contraction that occurs when a muscle shortens against a load; an instance of this (cf. sense A. 2c); (b) Ophthalmology loss of the peripheral ring of the visual field; = tunnel vision n. at tunnel n. Compounds 2. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > limited visual field hemiopia1811 scotoma1821 concentric contraction1858 hemianopia1882 hemianopsia1883 field defect1884 quadrantanopia1909 quadrantanopsia1910 macular sparing1940 tunnel vision1949 1858 C. F. Taylor in N. Amer. Jrnl. Homœopathy 7 30 (heading) Concentric contraction and excentric contraction. 1859 T. Windsor tr. A. von Graefe Three Mem. Iridectomy in Sel. Monogr. (New Sydenham Soc.) 337 The prognosis is completely changed as soon as the field of vision is contracted. Yet a moderate concentric contraction [Ger. concentrische Verengerung] is relatively the most favorable. 1946 Mich. Law Rev. 44 756 Hysterical hemianopsia is very rare; concentric contraction of the field..is the more common field defect. 2008 N. Draper & C. Hodgson Adventure Sport Physiol. iv. 120/1 When a muscle moves as part of a contraction, the load can be applied when the muscle is shortening (a concentric contraction) or when the muscle is lengthening (an eccentric contraction). < as lemmas |
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