Lateral Giant

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The Lateral Giant interneurons (LG) are found in crayfish and many other decapod crustaceans. The name Lateral Giant is also used in reference to large axons in annelids.

Contents

Identification

The lateral giants are located in the dorsal lateral region of the ventral nerve cord. They are easily recognizable by their large profile in cross section.

Anatomy

The lateral giants are a segmental chain of neurons that are joined by gap junctions, so they function much like a single pair of neurons. Each lateral giant consists of a giant axon, an ipsilateral dendrite, and a contralateral soma (Remler et al. 1968). They make synaptic connections with fast flexor motor giant neurons in the first three anterior segments of the abdomen, but not the posterior three (Wine 1984).

Physiology

Lateral giant neurons are responsible for escape responses (Wine 1984).

References

Remler MP, Selverston AI, Kennedy D. 1968. Lateral giant fibers of crayfish: location of somata by dye injection. Science 162(3850): 281-283. http://dx.doi.org/10.1126/science.162.3850.281

Wine JJ. 1984. The structural basis of an innate behavioural pattern. The Journal of Experimental Biology 112: 283-319.

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