490 



ELECTRO-PHYSIOLOGY 



Orthorheonome (von Fleischl), ii. 128 

 Ova, polarisation of (Roux), i. 310 



PALAEMON squilla, nerve-fibres, ii. 45 

 Paradoxical contraction, ii. 270 ; tetanus, 



271 

 Paramsecinm, galvanotropic manifestations, 



i. 308 

 Parelectronomy in electrical organ, ii. 462 ; 



in muscle, i. 338 ft'., 389 

 Pelomyxa, electrical excitation, i. 305 

 Peristaltic wave, i. 170 

 Petromyzon, nerve-fibres, ii. 47 

 Pfiuger's law of contraction, ii. 136 ; for 



cardiac vagus, 194 ; secretory nerves, 



195 ; sensory nerves, 195 ; smooth 



muscle, 194 



avalanche theory, ii. 94 

 Phasic action current, ii. 262 

 Phototonus, ii. 256 



Physical (and physiological) electrotonus, 

 ii. 250, 294 



Plant currents, ii. 1 ff., 31 



Plates, electrical, ii. 361, 373 ; enumera- 

 tion, 396 ; nerve-endings, 364, 374 



Polar action of electrical current, in cardiac 

 muscle, i. 228 ff., 258 ; in muscle, 203 

 ff., 228 ; in nerve, ii. 138 ff. ; in ova, 

 310 ; in protozoa, i. 202 



of brief (induction) currents, ii. 207 

 Polarisation, of electrical organ, ii. 447 ff. 



of muscle, i. 276 ff. ; of smooth muscle 



(ureter), 294 ; of uninjured muscle, 

 458 : during ether narcosis,' 451 ; in- 

 ternal (du Bois - Reymoud), 442 ; 

 positive, 443 



- of nerve, ii. 309 ff. ; positive, 309 



of ova (morphological), i. 310 



- utter-effects (on excitability) in muscle, 



i. 287, 291 ; in nerve, ii. 143 

 Polarisation currents, in electrical organ, 

 ii. 447 ff. 



- in muscle, i. 442 ff. ; anodic and kathodic 



(Bering), 445 ; relation to polar action 

 of current, 444 ; theory, 445 



in nerve, ii. 309 ft'. ; anodic and kathodic, 



310; theory, 315 ff. 



after-currents, in muscle, i. 442 ff. ; in 



nerve, ii. 309 ff. ; in electrical organ, 



447 IV. 

 Polarisation increment (Hermann's law), ii. 



315 



Pole, definition of physiological, i. 212 

 Polystomella, electrical excitation, i. 303 

 Porret's phenomenon in muscle, i. 273 

 Positive variation of muscle-current, i. 432 



after- variation, ii. 248 



Potassium iodide electrolysis, ii. 417, 420 

 Potassium salts, action on muscle, i. 67, 172; 

 on E.M.F., 355, 356 ; on polar excita- 

 bility, 220 



on nerve, ii 175 



Potassium salts, antagonism to sodium salts, 

 i. 221, 354 



Pouillet's method of time-measurement, ii. 

 59, 432 



Pre-existence of muscle current, i. 338 



Preformation of electrical elements, ii. 

 339 



Pressure of muscle, action on secondary ex- 

 citation from muscle to muscle, i. 427 



Primary and secondary opening twitches, 

 ii. 178 ; comparison with Ritter's 

 tetanus, 180 



Protozoa, structure of muscle, i. 3 ; electri- 

 cal excitation, 299 



Pseudo-electric organs, ii. 379 ; activity, 420 



Pseudopodia, reaction in electrical excita- 

 tion, i. 300 



Pupillar dilatation, ii. 106 



QUICK and sluggish muscle-fibres, i. 59 ft'. 



RAJA, electrical organ, ii. 376 ; current of 

 rest, 446 ; development, 383 ; dis- 

 charge from organ, 420 



Reaction of degeneration, i. 182, 273 ; of 

 partially injured muscle, i. 217 



Reaction (chemical) of electrical organ, ii. 

 465 



of active and resting muscle, ii. 465 



of nerve, ii. 110 



Recovery of muscular excitability, i. 354 



Reflex arc, ii. 87 

 - time, ii. 67, 72 



Reflexes, discharged by electrical excita- 

 tion, ii. 70, 108 ft'. 



Refractory period of cardiac muscle, i. 288 



Relaxation and assimilation, i. 99 



Remak's fibres, ii. 37 



Renewal of cross-section, effect on muscle 

 current, i. 344 



Repeated stimuli, action on nerve, ii. 

 215 ff. 



Resistance in muscle and nerve, i. 200 ; ii. 

 133, 304 



Respiration, effect on electromotivity of 

 leaves, ii. 4 



of muscle, i. 96 

 lletinal currents, ii. 470 ff. 

 Rheonome (v. Fleischl), ii. 128 

 Rheotachygraphic method, i. 373, 386,395 

 Rheotome, Bernstein's differential, i. 367 : 



fall, 353, 385 



Rhizopoda, electrical excitation, i. 299 

 A' ///"/ i/ini-fia (and water rigor), i. 357 

 Ritter-Nobili law of. contraction, ii. 135 

 Ritter-Rollett phenomenon, ii. 105 

 Ritter's tetanus. See Opening tetanus 

 Ritter-Valli law, ii. 90, 164 

 Rosenthal's law of moribund nerve, ii. 

 159 ; schema of gastrocnemius struc- 

 ture, i. 324 



