title: Frequency transfer properties of three distinct types of cat horizontal cells.
abstract: Intracellular responses of horizontal cells in the retina were recorded from the intact eye in situ of anesthetized and paralyzed cats. The responses to large (15 X 15 degrees) high modulation (0.6-0.9) photopic (140-200 cd/m2) sinewave light stimuli could be grouped unequivocally into three distinct classes on the basis of the critical flicker frequency (CFF); Hn-units had a CEF of 25-40 Hz, hm-units of 55-70 Hz and Hw-units of 95-110 Hz. For some stimulus situations small oscillations could be seen in Hm-responses (resonance frequency of about 43 Hz) and Hw-responses (resonance frequency 95 Hz). Hn-responses never showed such an oscillatory tendency. Frequency transfer functions are presented for the three types of H-units and a phenomenological model is discussed that describes these results quantitatively.
mesh_terms: D000200:Action Potentials; D000221:Adaptation, Ocular; D000771:Anesthesia, Intravenous; D000818:Animals; D002415:Cats; D004594:Electrophysiology; D005425:Flicker Fusion; D007395:Interneurons / Q000502:physiology; D008564:Membrane Potentials; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000502:physiology*