Journal of comparative physiology

, Volume 114, Issue 1, pp 51–67 | Cite as

Number and location of the sites of impulse generation in the lateral-line afferents ofXenopus laevis

  • A. Pabst


  1. 1.

    Every afferent fibre of the lateral line divides into 2 collaterals upon reaching the stitch (neuromast group). Each collateral innervates a part of the stitch, and sends branches to each individual neuromast (Fig. 3) in its region.

  2. 2.

    In the area of a stitch the nodes of RANVIER of the afferent and efferent fibres only occur at the branching points. The myelin ends at the basement membrane of the neuromasts (Fig. 5).

  3. 3.

    Simultaneous extracellular recordings of afferent activity in two neuromasts show that each neuromast has one impulse generation site. This is situated distal to the myelinated region of the fibre (Figs. 7, 9–11).

  4. 4.

    In any one stitch the afferent impulses generated by a single neuromast propagate orthodromically and antidromically within the collaterals and branches of the fibre.



Basement Membrane Lateral Line Afferent Fibre Afferent Activity Extracellular Recording 
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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • A. Pabst
    • 1
  1. 1.Institut für Tierphysiologie und Angewandte Zoologie der Freien Universität BerlinBerlin 41

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