ausblenden:
Schlagwörter:
STARBURST AMACRINE CELLS; SELECTIVE GANGLION-CELLS; PLATE TANGENTIAL
CELLS; INTRINSIC ELECTROPHYSIOLOGICAL CHARACTERISTICS; ACCESSORY
OPTIC-SYSTEM; UNDERLYING DIRECTIONAL SELECTIVITY; FLOW PROCESSING
INTERNEURONS; RECEPTIVE-FIELD ORGANIZATION; VISUAL RESPONSE PROPERTIES;
GIANT VERTICAL CELLSNeurosciences;
Zusammenfassung:
Motion vision provides essential cues for navigation and course control
as well as for mate, prey, or predator detection. Consequently, neurons
responding to visual motion in a direction-selective way are found in
almost all species that see. However, directional information is not
explicitly encoded at the level of a single photoreceptor. Rather, it
has to be computed from the spatio-temporal excitation level of at
least two photoreceptors. How this computation is done and how this
computation is implemented in terms of neural circuitry and membrane
biophysics have remained the focus of intense research over many
decades. Here, we review recent progress made in this area with an
emphasis on insects and the vertebrate retina.
