INDEX 



779 



foveal 



macula lutea and, 666 



geniculate facilitation, 733 



implicit time and stimulus area, 728 



modes of study, 7 1 4 



modulators 



as absorption curses, 708 

 in cones and rods, 708 



movement, 738 

 description of, 715 



pattern recognition, 641 



primary line of sight, 653 



problems of, 715 



real movement and, 737 



retinal image formation and, 647-691 



solid angle and, 665 



striate cortex and, 727 



sustained potentials 



apparent movement and, 738 

 dendritic activity and, 735 



sustained potentials in, 729, 735 



triad response, 662 

 Visual accommodation : see Accommoda- 

 tion 

 Visual cortex, 719-725 



ablation in monkey, 727 



activation of neurons in, 727 



dendrite behavior in, 726 



latency to spectral stimuli, 739 



periodic excitability change, 309 



postexcitatory depression and, 309 



refractory periods, 308 



response to stimuli, 719, 738 



retinal stimulation and, 726 



subcortical pathways to, 726 



Visual excitation 



absorption spectra and, 682 



chemistry and, 671, 679 



enzymes and, 673 



nicotinamide and, 691 



opsin in, 679 



spectral sensitivity and, 682 



vitamin A and, 691 

 Visual fields 



definition of, 664 



limits, 665 

 Visual pigments, 671-691 



ief also Cyanopsin; lodopsin; Opsin; 

 Retinene; Rhodopsin 



adaptation and, 684 



alcohol dehydrogenase, 673 



chemistry of, 67 1 



cones and, 67 1 



cyanopsin as, 678 



DPN and, 673 



in eye, 617 



porphyropsin as, 676 



rhodopsin and, 672, 678 



rods and, 67 i 



\isual sensitivity and, 685 

 Visual purple : see Rhodopsin 

 Visual system, central, 713-739 



bilateral function in, 736 



cortical response to stimuli, 719 



habituation 



experimental production, 754 



interaction with auditory impulses, 31 1 



receptors 



organization of, 705 



recruitment in, 311 



sensitivity 



visual pigment and, 685 



spatial summation, 723 



spectral stimulation and, 738 



stimulus area 



and implicit time, 728 



temporal summation, 723, 724 

 Vitamin A 



night blindness and, 688 



retinal integrity and, 689 



retinitis pigmentosa and, 691 



rhodopsin and, 672, 674 



visual excitation and, 691 



visual pigments and, 676 

 Vitreous humor 



index, 656 

 Volume conductor ; see Ner\"c impulse 



Warm fibers 



see also Thermal fibers 



discharge, 448 



discharge and temperature, 448 



latency to cooling, 452 



temperature change and, 450 

 Warm threshold: see Thermal thresholds 

 Warmth sensation : see Thermal sensations 

 Weber-Fechner law: see Nerve impulse 

 Weber's deception : see Thermal sensations 

 Weber's phenomenon: see Thermal sen- 

 sations 

 Weber's theory : see Thermal sensations 

 Wedensky inhibition 



definition, 159 



explanation, 159 



