retinal receptive fields Jonathan Schmok, Bochao Li, Yihan Zi - - PowerPoint PPT Presentation
Model of motion-sensing retinal receptive fields Jonathan Schmok, Bochao Li, Yihan Zi Special thanks to Jun Wang The Retina - Directionally Sensitive(DS) Cells Why this project? Study of information coding in retina output firing pattern
Special thanks to Jun Wang
Why this project? Study of information coding in retina output firing pattern
Gap Junctions Chemical Synapse Leaky-Passive Neurons Hodgkin-Huxley Neuron
π neuron π neuron
arithmetic neuron arithmetic neuron
neuron
Input:
Parameter Value Capacitance 10 uF/cm^2 Leak Conductance 0.3 mS/cm^2 Resting Potential 0 mV
Model: Leaky Passive Neurons ππ€ ππ’ = π½ππ¦π’ β ππ β π β πΉπ π·π
Input:
Parameter Value Capacitance 250 uF/cm^2 Leak Conductance 0.3 mS/cm^2 Resting Potential 0 mV
Model: Leaky Passive Neurons ππ€ ππ’ = π½πππ β ππ β π β πΉπ π·π
Parameter Value Capacitance 10 uF/cm^2 Leak Conductance 0.3 mS/cm^2 Resting Potential 0 mV
Model: Leaky Passive Neurons ππ€ ππ’ = (π½πππ1β π½πππ2) β ππ β π β πΉπ π·π
research
Parameter Value Capacitance 10 uF/cm^2 ππ 0.3 ms/cm^2 πΉπ
πππ 100 mS/cm^2 ππΏ 30 mS/cm^2 πΉππ 40 mV πΉπΏ
Model: Hodgkin-Huxley Neuron ππ€ ππ’ = ππ β πΉπ β π + π½πΉπ¦πππ’ππ’ππ π§ β π½π½πβππππ’ππ π§ β ππππ3β π β πΉππ β ππΏπ4 π β πΉπΏ π·π
and inhibitory synapse from right arithmetic unit define preferred and null direction
discrimination β other parameters from physiological measurements
Preferred Direction Null Direction
Preferred Direction Null Direction
0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0.3 0.5 1 2.5 5 7.5 10 12.5 15
Spke interval input contrast
Period=500
Contrast for Spike Spike interval responds to velocity
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.3 0.5 1 2.5 5 7.5 10 12.5 15
Spike interval input contrast
Period=200
0.01 0.02 0.03 0.04 0.05 0.06 0.3 0.5 1 2.5 5 7.5 10 12.5 15
SPike interval input contrast
Period=50
0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0.3 0.5 1 2.5 5 7.5 10 12.5 15
Spke interval input contrast
Period=500