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Neuronal Control of LocomotionFrom Mollusc to Man$
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Grigori Orlovsky, T. G. Deliagina, and Sten Grillner

Print publication date: 1999

Print ISBN-13: 9780198524052

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198524052.001.0001

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Walking in the crayfish and lobster

Walking in the crayfish and lobster

(p.62) 4 Walking in the crayfish and lobster
Neuronal Control of Locomotion

G. N. Orlovsky

T. G. Deliagina

S. Grillner

Oxford University Press

Walking with legs is the main form of locomotion in most species of decapod Crustacea. This chapter focuses on the walking movements in molluscs such as crayfish and lobster. In addition, some species, such as crayfish and lobsters, can swim both forward with the swimmerets and backward with flips of the abdomen. Crustaceans have been extensively examined at the behavioural, network, and cellular levels, and the corresponding neuronal mechanisms have been understood to a considerable extent. The lobster exhibits a walking pattern characteristic of many decapods, and can walk in any direction, using all or only a subset of ten walking legs. The coordination of the numerous legs in the walking crayfish or lobster is achieved due to the interactions between their controllers. Mutual influences between the leg controllers were revealed in experiments where the movement of one leg was perturbed. The locomotor system can be activated by stimulation of command neurons in both crayfish and lobsters.

Keywords:   crayfish, lobsters, crustaceans, neuronal mechanisms, locomotor systems, walking pattern

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