The name is absent

3.3.4 HCN channel shaping of photocurrent.................. 42

3.3.5 HCN contribution to GWN estimated kernel (impulse response) . . 44

3.4 Discussion................................ 48

3.4.1 I_h in salamander rods and cones is mediated by HCNl channels . . 48

3.4.2 Conductance of single HCNl channels.................. 50

3.4.3 HcNlchannelscreateabandpassfilterinphotoreceptors...... 50

3.4.4 HCN1 channels help rods and cones efficiently encode impulses of
light...................................... 51

3.4.5 Conclusion........ 53

4 Functional Models of the Rod and Cone 55

4.1 Interactions between Ih and Iχ_x in the rod light response....... 55

4.1.1 Introduction................................. 55

4.1.2 Results............ 57

4.1.3 Discussion.................................. 61

4.2 Model of a cone.................................... 65

4.2.1 Feedbackfromhorizontalcelltocone........... 65

5 Electrical Coupling in the Rod Network 71

5.1 Introduction...................................... 71

5.2 Measurement of coupling resistance using light stimuli............. 73

5.3 Measurement of coupling resistance using electrical stimuli.......... 78

5.4 Cable Theory............................... 85

5.4.1 Cableequationinonedimension........ 86

5.4.2 Cable equation in two dimensions .................... 90

5.4.3 Discrete cable................................ 91

5.4.4 NumericalMethods............................. 91

5.4.5 Network input impedance......................... 94

5.4.6 Network impulse response and frequency response.......... 95

5.5 Estimation of adjacent coupling resistance .................... 98

5.6 Couplingandnoiseintherodnetwork......................IOl

5.7 Discussion.......................................108

5.7.1 Measurementofcouplingwithlight ................ 108

5.7.2 Measurement of coupling via dual-patch.................109

5.7.3 Significance of rod-rod coupling .....................Ill