766 



HANDBOOK OF PHYSIOLOGY 



NEUROPHYSIOLOGY I 



Cold-blooded animals 



thermal receptors in, 445 

 Cold fibers 



see also Thermal fibers 



discharge, 446 



and temperature, 447 



paradoxical discharge, 452 



temperature change and, 449 

 Cold receptors 



depth in cat tongue, 43JJ 

 Cold sensation: see Thermal sensation 

 Colliculi, inferior 



heaving and, 589, 590 

 Color experience 



with non-spectral stimuli, 738 

 C'olor vision 



definition, 716 



description of, 738 



electrophysiology of, 706 



in cat, 739 



in decorticate animal, 728 



in lower animals, 706 



problems related to, 738 

 Conditioned reflex 



see also Behavior; Self-selection studies; 

 Appetitive behavior 



as test for auditory function, 596 

 Conditioning nerve impulse: my Nerve 



impulse, conditioning 

 Conduction, 75-1 19 



see also Nerve impulse; Transmission 



external resistance and, 1 06 



narcosis and, i 14 



polarized fiber, i 1 1 



retinal, 696 



safety factor, 108 



saltatory, 106 

 model, 109 



velocity 



determination of, 103 

 of nerve fibers, 78 

 Cones 



arthropod, 633 



electroretinogram and, 699 



flicker fusion and, 708 



histology of, 693 



modulators in, 708 



visual pigments in, 671 

 Convergence 



accommodative 



accommodation and, 664 



fusional 



innervation of, 663 



relation of accommodative and fu- 

 sional, 663 

 Convulsions, generalized, 329-360 



see also Pentylenetetrazol seizures; 

 Strychnine convulsions; Epilepsy; 

 Anoxia, convulsions 



cortical potentials and, 322, 323 



cortical theory, 333 



eclectic theory, 333 



electrical discharge, 338 

 duration of, 343 

 propagation of, 350 



factors producing, 338 



inhibition, 343 



mechanism of discharge, 334 



neuronal exhaustion, 343 



produced by analeptics, 340 



reticular formation and, 335, 340 



subcortical theory, 332 



unified concept, 338 



without loss of consciousness, 339 

 Cornea 



configuration, 657 



indices of layers, 656 



pain and, 465 



pain receptors in, 466 

 Crista 



anatomy of, 551 

 Critical flicker frequency: see Flicker 

 Critical potential 



frequency of the discharge and, 128, 



13-i 

 Crustaceans 



see also Invertebrates 



muscle 



end-plate potentials, 243 

 inhibition in, 244 

 innervation, 240 

 slow and fast potentials, 241 



neiu'omuscular transmission in, 240, 

 243, 244 

 Curare 



see also Cholinergic transmitter; Acetyl- 

 choline; Transmitter substances; 

 Neuromuscular transmission ; Para- 

 sympathin 



arthropod neuromuscular transmission 

 and, 244, 247 



competition with acetylcholine, 210 



end-plate potential and, 203 



transmission and, 149 

 C'litaneous sensations 



see also Thermal sensations; Tactile 

 system; Skin receptors; Touch- 

 pressure system 



activity in fibers of different size, 394 



concept of Head, 391 



pattern theory, 390 



sensory recovery after section, 475 



theories of, 390, 391 

 Cyanopsin 



see also Visual pigments 



as visual pigment, 678 



photopic sensiti\'ity and, 684 



Dark adaptation 



liver disorders and, 690 

 pigment resynthesis and, 686 



D.C. potentials, 315-327 

 anoxia and, 318 



asphyxia and, 318 



convulsoid discharge and, 322 



cortical anemia and, 318 



definition, 315 



evoked potentials and, 319 



factors affecting, 315 



human scalp, 326 



origin, 326 



polarization and, 316 



recording of, 316 



on conventional EEG, 317 



recruiting responses and, 320 



shift 



ECG and, 319 



spreading depression and, 323 



stimiUation multisvnaptic path and, 

 326 



strychnine and, 321 



veratrine spikes and, 321 

 Uecamethonium 



after-discharge and, 306 



effect on synapses, 1 79 

 Dcfacilitation 



definition, 157 

 Deiter's nucleus 



equilibrium and, 558 

 Dendrites 



see also Nerve fibers 



activity of, 735 



behavior in optic cortex, 726 



function, 59 



potentials from, 273 



sustained potentials and, 735 

 Depolarization 



see also Postsynaptic potentials; Po- 

 larization 



acetylcholine and, 210 



critical, 95 



postsynaptic potential during, 158 



threshold, 95 

 Diencephalon 



chemical stimulation of, 335 



electrical stimulation of, 334 



origin of generalized discharges, 334 

 Diffuse thalamic projection system: see 

 Thalamus, diffuse projection system 

 Diphosphopyridine nucleotide 



visual pigments and, 673 

 Direct current potentials: see D.C. po- 

 tentials 

 Dol 



as measure of pain, 463 

 Dopamine 



see also Catechol amines. Norepi- 

 nephrine, Epinephrine; Isopropyl- 

 norepinephrine; .Adrenergic trans- 

 mitter; Transmitter substance 



as adrenergic transmitter, 229 

 Dorsal columns 



see also Spinal cord 



nuclei 



