Currents in the Synaptic Terminals of Barnacle Photoreceptors

  • Ann E. Stuart
  • Jon H. Hayashi
  • John W. Moore
  • Ralph E. Davis
Part of the Topics in the Neurosciences book series (TNSC, volume 1)


The photoreceptors of the giant barnacle are distinguished anatomically by large axons, visible under the dissecting microscope even to their presynaptic terminal arborizations. Intracellular recordings made from these cells near their presynaptic arbor have shown that the ocellar response to light is conducted with little decrement to the presynaptic terminals, and have demonstrated the presence of voltage-sensitive calcium channels in this region of the cell (Hudspeth & Stuart, 1977; Ross & Stuart, 1978; Edgington & Stuart 1979,1981). Using optical methods, Ross and colleagues have studied the time course of the resulting changes in intracellular calcium concentration (Stockbridge & Ross, 1984).


Outward Current Calcium Current Voltage Clamp Squid Axon Suction Electrode 
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Copyright information

© Martinus Nijhoff Publishing, Boston 1986

Authors and Affiliations

  • Ann E. Stuart
    • 1
  • Jon H. Hayashi
    • 1
  • John W. Moore
    • 2
  • Ralph E. Davis
    • 1
    • 3
  1. 1.University of North CarolinaChapel HillUSA
  2. 2.Duke UniversityDurhamUSA
  3. 3.Marine Biological LabWoods HoleUSA

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