As material for the study of functional connexions within a central nervous system,
invertebrates with ganglionated nerve cords appear to offer advantages absent elsewhere …

In previous publications it has been shown that it is possible to isolate single functional
interneurons in the circumesophageal commissures, the connections between …

In previous papers (Wiersnia,'47,'49,'5%) it has been shown that single fibers can he
isolated in the esophageal commissures of the crayfish, Canibarus clarkii, which, on …

The anatomy and, to a certain extent, the physiology of these fibers were studied by Johnson
(6, 7). In Cambarus he found that the four giant fiberswhich, like the three giant fibers of the …

1. The activity of interneurons in the abdominal nerve cord of the crayfish has been recorded
using intracellular electrondes in ganglionic neuropile, or by isolation of fibers by dissection …

Johnson has made studies about the course, the connections and the function of the giant
fibers of the central nervous system of a few crustaceans, especially of Cambarus. Without …

The motor effects evoked by stimulation of each of eight command fibres in the
circumoesophageal commissures of the crayfish are described. The fibres obtained …

Responses of ascending interneurons from the caudal ganglion of crayfish have been
recorded from single units isolated by dissection from the ventral nerve cord; in addition …

METHODS The methods were similar to those used for the analysis of units in the crayfish
commissure, and have been described in detail elsewhere (Hughes and Wiersma,'60a). It …

Command interneurons from the circumoesophageal connectives of crayfish which are
capable of evoking various cyclical, phasic behavioural outputs are described. By pooling …