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It had long been known that the decapitated cock can cross a yard. During the last century an automatic mechanism controlling stepping movements has also been found in other vertebrates. The system controlling locomotion has many features similar to these systems controlling other natural movements: respiration (28), micturition (98), scratching (154),(More)
Trains of electrical stimuli were delivered to the mesencephalic 'locomotor region' in the rough skin newt. The current (3-12 mcA) and the interstimulus interval (100 to 200 ms) were adjusted so that locomotion arose in approximately 10 s, or so that the train remained subthreshold for initiation of locomotion. Impulses of single neurons in the hindbrain(More)
This chapter summarizes experiments which were designed to reveal how repetitive electrical stimulation of the mesencephalic locomotor region (MLR) recruits nearby hindbrain neurons into activity, such that locomotion can ensue in the tiger salamander, A. tigrinum. The MLR stimulus strength was subthreshold or near-threshold for locomotor movements to(More)
Synaptic responses of single neurons of upper cervical segments to stimulation of the bulbar "locomotor strip" were recorded extracellularly in mesencephalic cats. The stimulating current being about 30 muA, these responses usually had 2-7 ms latencies and appeared in neurons located at a depth of 2-4 mm from the dorsal surface (Rexed's laminae V-VIII).(More)