| 释义 |
neuropil Neurol.|ˈnjʊərəʊpɪl|
Also neuropile |-paɪl|.
[prob. a shortening of next: cf. pile n.5]
a. A network of interwoven unmyelinated nerve fibres and their branches and synapses; hence, esp. in organisms with simple nervous systems, a structure composed of, or a region in which is concentrated, such a network.
b. rare. An ultimate branch of a nerve fibre.
1899L. F. Barker Nervous System xxiii. 271 This investigator..isolated the neuropil of the second antenna of Carcinus—in other words, he removed the ganglion cells of the neurones supplying the antenna, but left their processes and side branches. 1900tr. A. Bethe in J. Loeb Compar. Physiol. Brain iii. 45 It was easy to decide this question by separating the ganglion-cells with their axis-cylinder process from the motor neurons without injuring the neuropiles. 1934Jrnl. Compar. Neurol. LIX. 95 In some parts of the [amphibian] brain much branched and contorted unmyelinated axons form a dense entanglement which is termed neuropil. 1941Johannsen & Butt Embryol. Insects & Myriapods ii. 21 The neuropile (Punctsubstanz, fibrillar substance, nerve fibers) develops in the ganglia in the older stages. 1953Nature 29 Aug. 405/1 The neurohæmal organs of the heart ligaments [in higher Crustacea] are..neuropiles. 1964R. M. & J. W. Fox Introd. Compar. Entomol. vi. 179 A ganglion.. has a central mass of medullary tissue (neuropile) consisting of the intermixed axons and dendrons of motor and internuncial neurons and the terminal arborizations of sensory dendrons. 1974Sci. Amer. Jan. 41/1 In addition to the major branches running through roots and connectives there are many such processes within the neuropil, the region in the center of the ganglion where synaptic connections are made. 1974Nature 4 Oct. 428/1 The ganglia..have a central fibrous neuropile containing most of the synapses. |