488 



ELECTRO-PHYSIOLOGY 



Inhibition, in cardiac vagus, ii. 194 



from central organs, ii. 160 



in intestine, i. 247 



in striated muscle, i. 267 



in nerves of crayfish claw, ii. 100, 185 

 Initial twitch, i. 133, 315 ; cardiac muscle, 



' 134 

 Injury current in cardiac muscle, i. 34.4 



in electrical organ, i. 443 



in muscle, i. 321 if., 345 ; smooth muscle, 



i. 344 ; theory, 345 ft'. 



in nerve, ii. 227 



in retina, ii. 470, 474 



persistence during anaesthesia, ii. 358 



with chemical stimulation, ii. 354 ff. 

 Innervation, voluntary, i. 138 ft". 



Insect muscle, contraction phenomena, i. 

 49 ; fatigue, 91 ; nature of twitch, 64 ; 

 quick and sluggish fibres, 67 ; struc- 

 ture, 33 ff. ; tetanus, 125, 132 ; 

 transmission of contraction, 155, 164 



nerves, ii. 36 



Interference of excitation, in muscle, i. 425 ; 

 in nerve, ii. 215 



between exciting and muscle currents, i. 



329 



between exciting and nerve currents, 



ii. 236 

 Interpolation of ganglionic elements along 



nerve-fibre, ii. 66 

 Internal polarisation, i. 442 ff. 

 Intersections, tendinous, i. 228 

 Interstitial granules in muscle, i. 30, 33 

 Intestine, conductivity, i. 170 ; electrical 



excitation, 240, 248 ft'. 

 Irradiation of excitation in central organs, 



ii. 70 

 Irreciprocity of conduction (du Bois-Rey- 



mond), ii. 457 

 Irritative after-currents (Hermann), i. 448 ; 



ii. 310 



Isoelectricity of uninjured muscle, i. 341, 379 

 Isolated conduction, law, ii. 56, 73 

 Isotonic and isometric contraction, i. 77, 81, 



99 



KAISER'S glycerin experiment, ii. 218 

 Katelectrotonus. See Electrotonus 

 Kathode, definition, i. 210 ; inhibition of 

 conductivity, 293 ff. ; ii. 140 ff. ; in- 

 hibition of excitability, i. 279 ff . ; ii. 

 140 ff. ; physiological, i. 212 

 Kathodic closure twitch, i. 272 

 Kinesodic substance, ii. 80 

 Kiihne's bifurcate experiment, i. 430 ; ii. 57 



theory of muscular innervation, 349 



LANTERMANN'S notches, ii. 43 



Latent period, i. 56, 72 ; of muscle elements, 

 73 ; of opening excitation in muscle, 

 190 ; dependence on current density, 

 216 ; on strength of stimulus, 72 



Latent period, of negative variation, i. 375 



with indirect excitation of crayfish claw, 



ii. 191 



Law of contraction (Pfliiger), with indirect 

 excitation of smooth muscle, ii. 193 



with excitation of afferent nerves, ii. 195 ; 



higher sensory nerves, 197 ; secretory 

 nerves, 195 



Laws, general, of contraction, Kitter-Nobili, 

 ii. 135 ; Pfliiger, 136 ; Helmholtz, 13 (5 



of excitation (du Bois-Reymond), i. 191, 



313 



of electrical excitation of nerve (du Bois- 



Reymond), ii. 116, 122 



of isolated conduction in nerve-fibres, ii. 



52 ; in nerve-centres, 56, 69 



of the current of action (Hermann), ii. 327 



of moribund nerve (Rosenthal), ii. 159 ; 



Ritter-Valli, 90, 164 



of muscle current, i. 353 



of nerve currents, ii. 227 



of polar excitation, i. 277 



of polarisation increment (Hermann), ii. 



315 



of preformation of electrical currents, ii. 



393 



of vital currents of nerve and muscle, 



i. 353 



Leaves, electromotive reaction, ii. 2 

 Leech, electrical excitation of cutaneous 



muscular integument, i. 245 ; electro- 

 motive action of skin, 477 

 Leistungsfahigkeit (capacity for work). See 



Excitability 

 Length of intrapolar nerve-tract, effect on 



excitation, ii. 145 

 Light stimulation, negative variation of 



optic nerve, ii. 256 ; of retinal current, 



472 ff. 

 Lilcke. See Breach 



MALAPTERURUS, electrical nerves, ii. 37, 

 403 ff. 



electrical organ, ii. 398 

 Mammalian heart, i. 404 



Man, electrotonic alterations of excitability, 



ii. 152 ff. ; phasic action current, i. 



394 ; in heart, 405 ; skin current, 



393, 513 

 Medullary sheath, ii. 41 ; function in 



electrotonus, 269 

 Medusa muscle, i. 59 

 Metabolism, i. 83 



in the eye, ii. 480 



in nerve, ii. 201, 249, 328 

 Metazoa, structure of muscle, i. 9 

 Microphone (Roth), i. 133 



Mimosa, excitatory movements, ii. 11 ; 

 negative variation, 17 ; theory of con- 

 ductivity, 12 ff. 



Mobility of protoplasm (excitation), i. 177 

 ft, 192 



