INDEX 



777 



Strychnine 



EEG and, 348 



inhibition of transmission, 71 

 partial epilepsy and, 348 

 postexcitatory depression and, 309 

 synaptic transmission and, 1 75 

 tetanus, 561 

 Strychnine convulsions 



see also Pentylenetetrazol seizures; 

 Convulsions, generalized; Epilepsy; 



Anoxia, convulsions 

 cortex, reactivity, 340 

 electrical discharges during, 339 

 reticular discharge during, 339 

 theory of, 344 

 Subthreshold response 

 action potential and, 98 

 area hypothesis, 98 

 membrane potential and, 98 

 spatial factor 



time course and, 98 

 theory, 76 

 Sugars 



order of sweetness, 520 

 Summation: see Spatial summation. 



Temporal summation; Pain; Ner\e 



impulse 

 Sweet taste 



effect of drugs, 520 

 molecular structure and, 518 

 order in sugars, 520 

 stereoisomerism and, 519 

 substances giving, 518 

 Sympathetic nervous system 



adrenergic transmission in, 218-229 

 pain and, 480-483 

 touch receptors and, 742 

 Sympathins 



see Adrenergic transmitter 

 Synapses, 147-194 



comparative physiology of, 1 71-175 



definition, 150 



electrically excitable and unexcitable, 



192 

 electrogenesis by, 153-165 

 electrotonic effects across, 163 

 excitability, 65 

 function, 60 

 inhibitory, 65 



strychnine and, 71 



tetanus toxin and, 71 

 integrative activity, 182 

 membrane 



augmented responsiveness, 169 



chemical sensitivity, 163 



postsynaptic, definition, 60 

 transducer action, 154, 157, 161 

 pericorpuscular knobs 



postsynaptic discharge and, 303 

 pharmacological properties, 175-182 

 postsynaptic membrane 



sustained electrogenesis and, 156 



postsynaptic potentials, 150-175 



presynaptic membrane 

 function, 60 



spatial interrelations, 182 



structure of, 61 



transmitter specificity, 181 

 Synaptic activators 



characterization, 1 75 



mode of action, 163, 180 

 Synaptic block 



barbiturates and, 301 



repetitive stimulation and, 301 

 Synaptic delay 



definition, 170 



explanation, 170 

 Synaptic electrogenesis: see Electrogenesis 

 Synaptic inactivators 



characterization, 163 



mode of action, 1 80 

 Synaptic inhibitors 



characterization, 175 

 Synaptic membrane: see .Synapse, mem- 

 brane 

 Synaptic transmission, 147-194 



see also Ephaptic transmission. Trans- 

 mission 



chemical, 150 



compared to conduction, 149 



compared to ephaptic, 149 



effectiveness of, 183 



electric current and, 67 



events in, 165 



integrative function of, 182-190 



Tactile activity 



postcentral fields and, 423 

 Tactile fibers 



in spinothalamic system, 416 

 Tactile stimuli 

 definition, 388 



fibers of different size and, 393 

 specificity of receptors, 391 

 Tactile system 



see also Touch -pressure system; Cu- 

 taneous stimuli; Skin receptors 

 central representation, 395 

 Talbot 



definition of, 665 

 Talbot effect 



description of, 730 

 Taste, 507-547 

 adaptation, 524 

 cross, 525 



enhanced sensitivity and, 525 

 area stimulated, 524 

 behavior and, 527 

 buds 



anatomical sites, 507 

 chemical stimuli and, 510 

 CNS pathways, 509 

 deficit 



ablation or section and, 510 



definition, 507 

 duration of stimulus, 524 

 effect of mixtures, 526 

 fibers 



pathway to CNS, 509 

 sensitivity pattern, 51 1 

 ingestion and, 529 

 intensity relations, 525 

 reaction time, 524 

 receptor anatomy, 507-509 

 receptor mechanisms, 510 

 reinforcement of conditioning by, 529 

 self-selection studies and, 527 

 sensiti\'ity 



drugs and, 510 



influence of blood constituents, 529 

 mechanisms of stimulation, 513 

 species differences, 51 1 

 specialization in animals, 376 

 specificity 



drugs and, 520 

 sites on cell membrane, 512 

 temperature and, 523 

 Taste blindness 



chemical structure and, 52 1 

 inheritance, 52 1 

 Taste threshold 

 cation series, 51 7 

 measures of, 513 

 sodium salts anion series, 517 

 Temperature 



brain excitability and, 308 

 change 



thermal receptors and, 449 

 gradient 



spatial and temporal aspects, 442 

 nerve fiber activity and, 446 

 taste sense, 523 

 Temperature sensibility: see Thermal 



sensations 

 Temporal information : see Audition 

 Temporal summation 

 in optic nerve, 723 

 in optic pathway, 723 

 Tetanus toxin 



inhibition of transmission, 71 

 Tetraethylammonium chloride 



action potential and, 101 

 Thalamocaudate inhibitory system: see 



Thalamus 

 Thalamic relay nucleus: see Thalamus, 



relay nuclei 

 Thalamus 



caudate inhibitory system and, 344 

 diffuse projection system 



pain and, 497 

 nuclei 



auditory cortex and, 598 

 pain fibers in, 490 

 petit mal and, 337 

 posterior nuclei 



as part of spinothalamic system, 418 



