ABSMAcr Coupled nonlinear differential equations are derived for the dynamics of spatially localized populations containing both excitatory and inhibitory model neurons. Phase plane methods and numerical solutions are then used to investigate population responses to various types of stimuli

, and the frequency of the discharge that it can maintain in response to steady suprathreshold illumination is decreased. This inhibitory action is exerted reciprocally between any two ommatidla in the eye that are separated by no more than a few millimeters. As a result of inhibitory interaction among neighboring

. This effect may be represented by the introduction of a nonlinearity in the Hartline-Ratliff system of equations. The nonlinear inhibitory effect appears to increase the operating range of the receptor units.

Perigeniculate neurons form an interactive sheet of cells that inhibit one another as well as thalamocortical neurons in the dorsal lateral geniculate nucleus (LGNd). The inhibitory influence of the GABAergic neurons of the perigeniculate nucleus (PGN) onto other PGN neurons was examined

) the monocularly deprived cortex lacks lateral inhibitory interactions which are characteristic of the normal cortex; and (4) steady-state responses howed little difference in spatial-frequency tuning and contrast sensitivity between the deprived and non-deprived eye, mostly confornfing to earlier field

You might find this additional info useful... This article cites 38 articles, 11 of which you can access for free at:

Most strabismic observers do not suffer from double vision because of suppression from conscious perception of 1 of the 2 eyes’ conflicting views. Direct evidence for the site and neural substrate of strabismic suppression has not been available so far, although psychophysical data suggest a cortical origin. On the other hand, cross-orientation suppression among conflicting stimuli presented monocularly has recently been shown to have a strong thalamic component. Here we present evidence, using both visual stimulation and pharmacological techniques, that strabismic suppression occurs in the primary visual cortex and involves g-amino butyric acid (GABA)--mediated inhibition. We show that its dependency on the drift rate of the suppressing stimulus is consistent with a cortical origin; unlike monocular cross-orientation suppression, it cannot be evoked by very fast--moving stimuli. Furthermore, strabismic suppression is greatly reduced when GABAergic inhibition is locally blocked by the GABAA antagonist bicuculline.

this article were defrayed in part by the payment of page charges. The article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.

of ATP. The carboxyl terminus of PMCA contains a high affinity calmodulin-binding sequence that interacts with the catalytic core and inhibits the activity of the pump in resting cells. In activated cells binding of Ca 2+-calmodulin to the calmodulin-binding sequence frees the catalytic core from

Several researchers have presented evidence that suggests that the processing of gus-tatory information at the level of the taste bud can involve interactions among taste fibers, for example, Bernard ' and Miller. ' We report here that two chorda tympani nerves in the same peripheral