Fig 6.

Distribution of input from different sources to feline intermediate zone premotor interneurons. (a) An example of the extent of dendrites of intermediate zone interneurons (rhodamine dextran-labelled interneuron). (b) Examples of extracellular records of responses from three interneurons, evoked by group I, group I and II, and group II afferents, respectively. (c) A series of intracellular records illustrating combinations of EPSPs of different amplitudes evoked from group I and II afferents in five interneurons. (d) A diagram illustrating a roughly linear relationship between the observed frequency of input from various combinations of input and frequencies expected on the basis of random connections of afferents with overlapping terminal projection areas. (a) Modified from fig. 2 in Liu et al. (2010); (b and c) from fig. 1 in Jankowska & Edgley (2010); (d) modified from fig. 3 in Harrison & Jankowska (1985). GS, gastrocnemius-soleus; Q, quadriceps; T, threshold.