Rise time and amplitude of visually elicited EPSPs of tectal neurons of the frog.
Visually elicited activities in response to on-off of diffuse light and moving patterns were recorded from tectal neurons of the frog by means of perforated in vivo whole cell recording technique. Rise time histograms of EPSPs had a single or multiple peaks. Comparing the histogram patterns for each stimulus, retinal fiber classes and positions of synapses on the dendrites could be correlated. In most cells, R3 fibers made synapses on proximal dendrites, whereas R1/R2 fibers on distal dendrites, which was consistent with anatomical findings. Preliminary quantum analysis of EPSP amplitudes was performed by fitting the histograms with a binomial curve and parameters q and n were determined. The result showed that the number n of synapses on distal dendrites is larger than those on proximal dendrites.
Matsumoto
N
N
Kyushu Institute of Technology, Faculty of Computer Science and Systems Engineering, Department of Biochemical Engineering and Science, Fukuoka, Japan.
Sadamori
E
E
Sugihara
T
T
D000818:Animals; D003712:Dendrites / Q000502:physiology; D005074:Evoked Potentials, Visual / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation; D011892:Rana catesbeiana / Q000033:anatomy & histology / Q000502:physiology*; D013477:Superior Colliculi / Q000166:cytology / Q000502:physiology*; D013569:Synapses / Q000502:physiology