348 



INDEX AND GLOSSARY 



Segmental apparatus, the Brain 



stem, 113, 114, 123 

 Segmentation of nervous system, 28, 



29, 30, 113, 125, 144, 150 

 Self-consciousness, 314 

 Senility, 316 

 Semicircular canals, nerve endings in, 



88,89 



SEMON, R., 295 



Sensation, a subjective experience 

 arising in response to stimula- 

 tion, 70, 108, 249, 250, 256, 257, 

 261 



common, 259 

 in lower animals, 72 

 neurological mechanism of, 250, 



257, 261 

 visceral, 77, 91, 148, 228, 234-246, 



250, 259 

 Sense, criteria of, 74 



organ. See Receptor. 

 Sentiments. See Affection. 

 Septum, the medial wall of the cere- 

 bral hemisphere between the 

 Lamina terminalis and the ol- 

 factory Bulb; in man its upper 

 part is thin and forms the Sep- 

 tum pellucidum, 219, 220, 306 

 dorsal median, of cord. See Fissure, 



dorsal. 



pellucidum, a thin sheet of nervous 

 tissue forming a portion of the 

 medial wall of each cerebral 

 hemisphere between the Corpus 

 callosum and the Fornix, 162 

 Sexual organs, innervation of, 232 



sensations from, 89 

 SHAMBAUGH, G. E., 198, 199, 203 

 Shark, nervous system of. See 



Fishes, nervous system of. 

 Sheath, medullary. See Myelin 



sheath. 



myelin. See Myelin sheath. 

 primitive. See Neurilemma. 

 of SCHWANN. See Neurilemma. 

 BHBLDON, H. s., 95, 248 

 SHKKKKV, .!., 94, 142 

 SIIKKIU\<;TO\, ('. S.. '.',:>. :!7. ti.1, C,S, 

 I:.. 77. '.).-,, r_H. i:U. 11_>. 17'_>. 180. 

 I'.H. _'!:;. -J.-,i). _>:,'.. LT.O, LV,L>. 281. 

 282, 300 

 Sight, organs of. See Vi-'Mal appara- 



toa 



Sinus, inferior, of labyrinth, 196 



Skin brain, 112, 123 

 nerves of. Sec Nerves, cutaneous, 

 nerve-endings in, 79, 80, 81-83, 84, 



86, 245, 253 



sensibility of, 70, 72, 79, 80-86, 

 132, 172-180, 212, 228-230, 

 245, 249, 250, 252, 253, 260 

 Sleep, 103, 104, 297 

 Smell, organs of. See Olfactory ap- 

 paratus. 



SMITH, G. ELLIOT, 263, 273, 278 

 Sneeze, mechanism of, 238 

 Social evolution, 314, 315 

 Somatic area. See Area, somatic, 

 cortex. See Neopallium. 

 nerves. See Nerve, somatic. 

 organs, those concerned with the 

 adjustment of the body to its 

 environment, 76, 79, 92, 109, 

 172 



Somesthetic apparatus, the general 

 somatic sensory systems, includ- 

 ing cutaneous and deep sensibil- 

 ity, 164, 165, 172-180 

 Somites (myotoms, primitive seg- 

 ments, mesodermal segments), 

 -eirinented masses of mesoderm in 

 vertebrate embryos which give 

 rise to the somatic muscles, 92 

 Sound, reaction time to, 9S 



receptors for. Sec Auditory ap- 

 paratus. 

 Space, discrimination of, 130, 132, 



137, 172, 178-1 MI 

 of NUEL, 197 

 perforated. S<-e Substantia per- 



forata. 



Speecli, apparatus of (including read- 

 ing and writing); cf. Aphasia, 283, 

 291-293 



SPENCER, HERHKHT, 17 

 Sphere, cortical. See Center, corti- 

 cal. 



Spiders, nervous system of, 29 

 SPIELMKVI.U, W., L'M 

 Spinal cord (medulla spinalis), that 

 portion of the central nervous 

 system contained within the 

 spinal Canal of the spinal 

 column, 106, 107, 110-112, 

 117, 118, 120, 122, 125, 126, 

 127. 128-130, 150, 151, 182 

 cervical, 12S. 129, 130 

 development of, 182 



