spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 1


Fig. 1. The early electrosensory pathways. The schematic diagram of the ELL sub-network shows two types of principle neurons, deep (DP) and superficial (P) pyramidal neurons, as well as the primary feedback nuclei, nucleus praeminentialis (nP) and eminentia granularis posterior (EGp). The nP and EGp give rise to the direct feedback pathway (not shown) and the indirect feedback pathway (via parallel fibers), respectively. Feedforward input to these nuclei arises primarily from DP neurons; EGp also receives input from other sensory modalities, such as proprioception. The indirect feedback is indicated by a population of parallel fiber synaptic inputs (numbered 1 to Nf) to the P neuron, and combines direct excitation (solid triangles) with disynaptic inhibition via interneurons I (denoted by open circles). Sensory input is faithfully transmitted to parallel fibers via DP neurons and nP. The dynamics of the parallel fiber synapses then determine the sign of the reafferent image onto P neurons (see Results).





Right arrow Return to article