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In 1961, neurobiologists found that the conduction velocity of the
nerve impulse in the giant nerve fiber of the Penaeus shrimp
abdominal nerve cord was over 200 m/s, the highest speed of
information transmission ever observed in the animal kingdom. The
peculiar myelin sheath with its unique nodal structure and the
electrical properties of the nerve fibers of the shrimp have
continued to be investigated for a quarter of century and are now
fully described in this book. The investigation dispels the
commonly held belief that the fastest recorded impulse conduction
is about 120 m/s in the thickest vertebrate myelinated nerve
fibers. In the shrimp, researchers found a completely novel type of
functional node in the giant fiber which they designated as the
fenestration node. In portions of the myelinated fiber, the
fenestration node furnished the sites of excitation. Also
discovered was a new strategy for increasing impulse conduction in
the shrimp. The book includes a section on the formation of the
fenestration node and the discovery of a strategy that allows the
shrimp to escape its predators by an action of the fastest
velocity. The data presented in this volume on the myelin sheath of
invertebrates present a new direction for this field and a rich
source of information for neurobiologists worldwide.
In 1961, neurobiologists found that the conduction velocity of the
nerve impulse in the giant nerve fiber of the" Penaeus "shrimp
abdominal nerve cord was over 200 m/s, the highest speed of
information transmission ever observed in the animal kingdom. The
peculiar myelin sheath with its unique nodal structure and the
electrical properties of the nerve fibers of the shrimp have
continued to be investigated for a quarter of century and are now
fully described in this book. The investigation dispels the
commonly held belief that the fastest recorded impulse conduction
is about 120 m/s in the thickest vertebrate myelinated nerve
fibers. In the shrimp, researchers found a completely novel type of
functional node in the giant fiber which they designated as the
fenestration node. In portions of the myelinated fiber, the
fenestration node furnished the sites of excitation. Also
discovered was a new strategy for increasing impulse conduction in
the shrimp. The book includes a section on the formation of the
fenestration node and the discovery of a strategy that allows the
shrimp to escape its predators by an action of the fastest
velocity. The data presented in this volume on the myelin sheath of
invertebrates present a new direction for this field and a rich
source of information for neurobiologists worldwide.
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