Sentence:  The first experiment consists in using the evolutionary algorithm for instantiating low level parameters of a connectionist simulation of the lamprey's locomotor <WSD>circuitry</WSD>. The second experiment develops potential neural circuits for the swimming and trotting of the salamander; an animal whose locomotor <WSD>circuitry</WSD> has currently not been decoded. 
Meaning of the word marked with <WSD> tags:  The brain's neural network.