Parent axon : Synonym for axon trunk. Galen in the second century used the term parent for macrodissected nerves (Herophilus, c335-280 BC) as a whole; see translation by Duckworth (1962, p. 203).

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Synonyms

Axon trunk : The segment of an axon (Kölliker, 1896) that begins at the distal (Barclay, 1803) end of the axon hillock (Schaffer, 1893) and extends distally, typically generating axon collaterals (Cajal, 1899) and remaining the thickest part of the overall axonal arborization; it comes to an abrupt end at a bifurcation (Cajal, 1889), when present. Galen in the second century used the term trunk for nerves (Herophilus, c335-280 BC) as a whole; see translation by May (1968, pp. 554, 572-573). Remak (1838) discovered that axons arise from neurons (Waldeyer, 1891).