nerve net

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nerve net

[′nərv ‚net]
(invertebrate zoology)
A network of continuous nerve cells characterized by diffuse spread of excitation, local and equipotential autonomy, spatial attenuation of conduction, and facilitation; occurs in cnidarians and certain other invertebrates.
References in periodicals archive ?
In scyphozoans, two parallel subumbrellar systems were found based on immunohistochemical staining: one associated with the swim motor system (giant fiber nerve net, also called the motor nerve net: Passano, 1965; Anderson and Schwab, 1981; Satterlie and Eichinger, 2014), and one with a sensory/modulatory network called the diffuse nerve net (Passano, 1965; Anderson et ai, 1992; Gremmelikhuijzen et al.
He has also worked on simulation of nerve nets with particular emphasis on using computers to test theories in neurophysiology.
Recent morphological evidence supports the presence of two separate nerve nets in the subumbrella of scyphomedusae (e.
Compressed z-stack images of [alpha]-tubulin- and FMRF-amide-labeled nerve nets from the swim musculature were printed onto 9 X 11-in paper, and 100 X 100-[micro]m quadrants were drawn using a stencil on each image.
Compressed z-stack images of a-tubulin-labeled nerve nets from the swim musculature were printed onto 9 X 11-in paper, and 100 X 100-[micro]m quadrants were drawn using a stencil on each image to cover as much area as possible.
Compressed z-stack images of a-tubulin-labeled nerve nets from the swim musculature of Tripedalia were uploaded into ImageProPlus (ver.
The lack of a clear association between the immunoreactive nerve nets and cnidocytes may, therefore, simply be a consequence of the anemone's anatomy.
Given the organization of the cnidocyte-associated peptidergic nerve nets presented here and the presence of what appear to be peptidergic afferent sensory neurons, it is tempting to speculate that the synaptic activity that can be recorded from the cnidocytes of Physalia (Purcell and Anderson, 1995) and Cladonema (Price and Anderson, unpubl, data) arises, directly or indirectly, from these peptidergic nerve nets.
The other site of abundant immunoreactivity was the mesogleal nerve net, a meshwork of neurons and amoebocytes embedded in the collagen-based jelly, the meso-glea, that separates ectoderm from endoderm [ILLUSTRATION FOR FIGURE 6D OMITTED].
The acute inhibitory effect of the antibody on electrically stimulated luminescence means that the antibody binds to an antigen widely distributed in the luminescent endoderm or in the nerve net that propagates the excitatory signals responsible for lighting up photocytes along the signal path (Anderson and Case, 1975).
In cnidarians, nerve nets are located under an overlying epithelium that forms a permeability barrier for pharmacological agents and microelectrodes.
Although Tau-IR was also present in the ectodermal myoepithelial cells, its absence in the DNN indicates that taurine is not a constituent component of all nerve nets in this animal.