Primate Type HIII Horizontal Cell

References

This variety of horizontal cell was introduced by Kolb, Linberg and Fisher (1992). It is intimately related to the HI. In their own words, "HIII, introduced here, has been separated from the HI type on morphological criteria of having a larger, more asymmetrical dendritic field and in contacting 30% more cones than the HI at any point on the retina."

• Postsynaptic connections (Input)
  • Cones (Kolb et al. '89)
    • Red Cones via conventional synapses
    • Green Cones via conventional synapses
    • No Blue Cones
  • Horizontal Cells
  • Bipolar Cell

• Presynaptic connections (Output)
  • Cones (Kolb et al. '89)
    • Red Cones via conventional synapses
    • Green Cones via conventional synapses
    • No Blue Cones
  • Horizontal Cells

• Function

• Morphology
  • Kolb, et al, 1992
    • Large Nuclei 13 um at 16mm
    • wider spread than HI
    • highly asymmetrical
    • appear to miss cones
    • at 2.5 mm from fovea 9 cones are contacted
    • AXon which terminates at unknown locale.

• Array characteristics

• Compartmental Model Characteristics

• Location

• Subclasses

• Synapse types

• Synapse Receptors

• Neurotransmitters

• Immunoreactivity
  • Macaque horizontal cells are probably GABAergic since they are immunoreactive to GABA and GAD
  • Agardh, Ehinger & Wu (1987) Vardi, Kaufman & Sterling (1994)
  • Stained by DAPI (diamidino phenylindole)
• Nomenclature

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