Page 368 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Potentials of photosensor, ON-bipolar and ON-ganglion cells

Cones ON-bipolar cell ON-ganglion cell Optic nerve fiber
Weak stimulus Stimuli
Membrane potential –40 0 mV Potential in stimulus of Visual
Strong stimulus
Weak
mV
Strong
stimulus
–70
Sensor potentials (s)
Action potentials
ON-bipolar cell
B. Receptive fields of “on” ganglion cells (1, 2) and “off” ganglion cells (3, 4) Processing
Center Center
1 3
lighted lighted Retinal
Plate 12.23

Off On Off Off On Off

Periphery Periphery
2 lighted 4 lighted

Off On Off Off On Off

C. Receptive field-related contrast (on ganglion cells)

–3 –1
–3 +24 –3 –3 +24 –3
–3 –1
Sum of stimuli: +12 Sum of stimuli: +16

–1 –3
–1 +8 –1 –1 +8 –1
–1 –3
Sum of stimuli: +4 Sum of stimuli: 0 355

Despopoulos, Color Atlas of Physiology © 2003 Thieme
All rights reserved. Usage subject to terms and conditions of license.