| 释义 |
‖ lemniscus|lɛmˈnɪskəs|
Pl. lemnisci |-ˈnɪsaɪ|.
[L.; see lemnisc.]
1. The character {div} used by ancient textual critics in their annotations.
1849W. Fitzgerald Whitaker's Disput. 125 Origen marked these texts with various asterisks and obeli, lemnisci and hypolemnisci.
2. One of the minute ribbon-like appendages of the generative pores of some entozoans.
1855in Ogilvie, Suppl. 1877Huxley Anat. Inv. Anim. xi. 652 The development of the Echinorhyncus now approaches completion. The lemnisci appear.
Delete ‖ and add: 3. Anat. A band or bundle of fibres in the central nervous system, esp. one of those connecting sensory nuclei to the thalamus. Also (now arch.) with mod.L. adjs.
1857Dunglison Dict. Med. Sci. (rev. ed.) 527/1 Laqueus, a prominent band in the brain, Lemniscus, behind the brachium posterius of the corpora quadrigemina, which marks the course of the superior division of the fasciculus olivaris. 1884Med. Rec. (N.Y.) XXVI. 394/1, I have intended to pave the way for the understanding of the lemniscus: a nerve tract of at least equal importance with that of the pyramids. 1913Cunningham's Text-bk. Anat. (ed. 4) 563 After decussating in the median plane, all the internal arcuate fibres which arise from these nuclei do not enter the lemniscus medialis. 1955Sci. Amer. Oct. 81 When the body is touched or stimulated in some way, nerve impulses go from the site of stimulation by pathways called the lemnisci to the thalamus in the center of the brain. 1961Lancet 26 Aug. 446/2 In the lower brain-stem degeneration was..moderate in the right medial lemniscus. 1974D. & M. Webster Compar. Vertebr. Morphol. xii. 278 Like the ventral spinothalamic tract, with which it is confluent, the lateral spinothalamic tract joins the medial lemniscus in the brainstem. 1980Gray's Anat. (ed. 36) vii. 911/1 The fibres of the trapezoid body turn upwards to contribute to the lateral lemniscus, as the ascending part of the auditory pathway. 1990Sci. Amer. June 36/2 From the cochlea, signals are processed sequentially, beginning at the cochlear nucleus and proceeding to the lateral lemniscus. |