470 



SUBJECT INDEX 



Extensor tonus, 26 

 Extracellular microelectrodes, 293 

 Extrapyramidal centers, 354 

 Extrasynaptic hypothesis of inhibition, 18 

 Extrinsic cardioregulatory fibers, 147 

 Extrinsic impulses. Crustacean heart gang- 

 lion, 149 



Facilitation, 19, 27, 306ff. 



of antidromic invasion by inhibitory 

 action, 312 

 Facilitatory interaction, 415 

 Factor I, 105, 322, 353, 354, 355, 359, 360, 



361, 362, 280 



actions compared with those of acetyl- 

 choline, 363 

 of GABA, 356flF. 



central actions, 355 



distribution in mammalian central nerv- 

 ous system, 354 

 Faiscau moyen of Cajal, 33 

 Field effects, 4, 12 

 Fishes, electric, 9, 93, 333, 336 



electrical guidance system, 331 

 Flavoprotein, 196 

 Flexor reflex, 15, 19 

 Fly, 403 

 Folic acid, 385 

 Follower cells, crustacean heart ganglion, 



5, 148, 158, 174 

 Formate, 81, 84 

 Frequency limitation, 64 

 Frog auricle, 121 



brain stem, 13 



muscle, 87, 89, 98, 378fr. 



nerve, 115, 379flF. 



sinus venosus, 360 



Gamma-amino butyric acid {see }'-Amino 

 butyric acid) 



Ganglion cells {see Anatomy of Aplysia vis- 

 ceral ganglion; Aplysia, Aplysia ganglion 

 cells; Crustacean heart ganglion; Mollusc 

 heart) 



Gaskell eiTect, 15 



Gasserian ganglion, 33 



Gastrocnemius-soleus, 61, 63 



Gastropods, ganglia of, 5 {see also Anatomy 

 oi Aplysia visceral ganglion; Aplysia) 



Generator potential (generator depolariza- 

 tion), 9, 149, 159, 162, 197, 198, 202, 223, 

 225, 243, 291, 293, 326, 333, 334, 361 



Giant axons, earthworm, 301 



Sepia, 195, 196, 199, 210, 215, 223 



Giant fiber nerve net, 401 



Giant interneuron, 405 



Giant nerve cells, 179 



Giant synapses (parallel contact synapses), 



40,41 

 Gland cells, 9, 333 



Glial invasion of nerve cells, 234, 237 

 Glutamate, 314, 385 

 Glutamic acid, 222, 378, 379 

 L-glutamic acid decarboxylase, 222 

 Goldfish, 12 

 Golgi cells, 32 

 Golgi methods, 44 



Grouped discharges, stretch receptors, 299ff. 

 Guanidine, 386 

 Guanidino acetic acid, 362 

 y-Guanidinobutyric acid, 356 

 }'-Guanidinobutylamine (agmatine), 362 

 /?-Guanidino propionic acid, 356, 362 

 Gymnotids, 336 



Haemoglobin, semi-conducting properties, 



224 



in /ip/v'^/a nerve cells, 194 

 Hair cells, 336 

 Heart, inhibition {see Cardiac inhibition; 



Crustacean heart ganglion; Inhibition in 



mollusc hearts; Inhibition of pacemaker 



neurons) 

 Helix, 239 



cardiac fibers, cytochromes, flavoproteins, 

 196 

 Heteroxenia, 399, 402 

 Heteroxenia fuscens, 400 

 Hippocampus, 433, 442 

 Hipponyx pilosus, 136 

 Histamine, 357 

 Histological basis of Renshaw inhibition, 



35ff. 

 Homarus, 148, 149, 151, 173, 174, 176, 177 

 Homarus americanus, 92, 105, 108, 144 

 Humoral theory 15 {see also Transmitters) 

 Hypothalamus, 357 

 Hypothesis, interference, 22, 23 



neurin, 20 



of direct inhibition, 15 



of extrasynaptic inhibition, 18 



of indirect inhibition, 15 



sieve, 83, 89 

 5-Hydroxy tryptamine (= Serotonine), 94, 



98, 99, 137, 357 



Identification of inhibitory transmitter, 



3420"., 350flF. 

 Ideopathic epilepsy, 389ff. 

 Impulse conduction, mammalian atrium, 



124 

 Indirect inhibition, hypotheses of, 15, 17, 19 

 Inferior rectus, 39 



