A Physiological Neural Controller of a Muscle Fiber Oculomotor Plant in Horizontal Monkey Saccades

Figure 7

The circuit model of an unmyelinated portion of squid giant axon [3]. The variable active gate resistances for Na⁺ and K⁺ are given by 𝑅_K=1/𝑔_K𝑁⁴ and 𝑅_Na=1/𝑔_Na𝑀³𝐻, respectively. The passive gates are modeled by a leakage channel with resistance, 𝑅_𝑙=3.33 kΩ. The battery is the Nernst potential for each ion: 𝐸_𝑙=49.4V, 𝐸_Na=55V, and 𝐸_K=72V.