Initial segment
(
Palay, 1964
)
: Typically the narrowest segment of the axon trunk, just distal (Barclay, 1803) to the axon hillock (Schaffer, 1893), where action potentials are typically generated; p. 86; term also used by Herndon (1963, p. 170). Also see Palay et al. (1968) and Strong & Elwyn (1925, Fig. 136).
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