History of Axon in Timeline

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Axon

An axon, or nerve fiber, is a long projection of a neuron that conducts electrical impulses (action potentials) away from the nerve cell body. Its primary function is to transmit information to other neurons, muscles, and glands. In sensory neurons, axons are referred to as afferent nerve fibers, conducting impulses from the periphery to the spinal cord. Axon dysfunction underlies various neurological disorders. Nerve fibers are classified into three groups (A, B, C) based on myelination and function (sensory/motor). Sensory fibers are also classified into Types I-IV.

1939: Hodgkin and Huxley Employ the Squid Giant Axon

In 1939, Alan Hodgkin and Andrew Huxley began employing the squid giant axon in their experiments, which would later contribute to their full quantitative description of the ionic basis of the action potential.

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1941: Erlanger and Gasser Publish Axon Classification

In 1941, Joseph Erlanger and Herbert Gasser published their findings establishing the first classification of axons. Their work proved the hypothesis that the thickness of an axon relates to its nerve conduction velocity, and identified several types of nerve fiber.

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1952: Hodgkin and Huxley Obtain Full Quantitative Description of Ionic Basis of Action Potential

By 1952, Alan Hodgkin and Andrew Huxley had obtained a full quantitative description of the ionic basis of the action potential through their work with the squid giant axon. This description led to the formulation of the Hodgkin-Huxley model.

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1963: Hodgkin and Huxley Awarded Nobel Prize

In 1963, Alan Hodgkin and Andrew Huxley were jointly awarded the Nobel Prize for their work detailing the ionic basis of the action potential.

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