INDEX AND GLOSSARY 



Optic tectum, an optic reflex center 

 in the roof of the midbrain. See 

 Colliculus, superior, 

 thalamus. See Diencephalon. 

 vesicle. See Vesicle, optic. 

 Oral, pertaining to the mouth, or 

 directed toward the mouth, as 

 opposed to Caudal. 

 sense of EDINGER, 219 

 Organ (organon), a part of the body 



with a particular function, 24 

 of CORTI. See Organ, spiral, 

 generative. See sexual organs, 

 lateral line (neuromasts), sense 

 organs in or under the skin of 

 fishes and amphibians of in- 

 termediate type between tac- 

 tile and auditory organs, 110- 

 112, 145, 148, 149, 152, 199, 

 200 



parietal. See Parietal eye. 

 pineal. See Body, pineal, 

 spiral (organon spirale), the organ 

 of CORTI or receptor for sound in 

 the Cochlea, 85, 197, 198, 199 

 Ossicles, auditory, 195, 196 

 Oxydation in neurones, '.Mi, 07. 99 

 Oxygen as respiratory stimulus, 238 



PACINIAN corpuscle, 79, 80, 88 

 I'ain, apparatus of; cf. Affection, 85, 

 89, 131, 132, 137, 138, 139, 141, 

 163-167, 172-174, 178-180, 228- 

 230, 243, 249-262, 286 

 conduction paths for, 249, 251, 



252, 253, 254. 257. 258 

 referred, 22S, 1>29, 230, 261 

 thalamic renter for. See Thala- 

 mus, pain center in. 

 Palaeencephalon, the old brain. /. >.. 

 all of the brain except the cerebral 

 cortex and its dependencies, 115, 

 363 



Palaeothalamus fold thalamus), the 

 phylogenetically old part of the 

 Thalamus, present in animals 

 which lack the cerebral cortex, It'.:;. 

 166 



Palate, 21: 1 , 



Pallium. See Cortex, cerebral, 216 

 Pancreas, 224 



Paralysis from central lesion. 17".. 

 178, 292 



Paraphysis, an evagination of the 

 membranous roof of the telen- 

 cephalon in front of the Velum 

 transversum in some vertebrate 

 brains. 



Parietal eye (parietal organ, pineal 

 eye, epiphyseal eye), a modifica- 

 tion of the pineal Body in some 

 lower vertebrates to form a dorsal 

 median eye, 162, 212 

 PARKER, G. H., 37, 75, 95, 199, 203, 



212, 214 



PARMELEE, M., 37 

 Pars intermedia of WRISBERG. See 



Nerve, intermediate. 

 Pars mamillaris hypothalmi, the 

 mammillary bodies and their 

 environs, 118 



optica hypothalami, the optic 

 Chiasma and its environs, 118, 

 121, 122 



Pause, central. 98 

 PAWLOW, I., 242, 248 

 Pedagogy. Sec Education. 

 Peduncle (peduncuhis), a peduncle 



or stalk. See Cms. 

 cerebellar, one of the fibrous stalks 

 by which the cerebellum is at- 

 tached to the brain stem. Then- 

 are three peduncles on each side: 

 (1) the superior peduncle (Bra- 

 chium conjunctivum), (2) the 

 middle peduncle iBrachium pon- 

 tis), (3) the inferior peduncle 

 (Corpus restiforme), 158, 187, 

 188 



cerebral (pedunculus cerebri), the 



ventral part of the mesen- 



cephalon. 118, 119, 120, 121. 



L58> mo, ic.7, 210, 211. :;oi 



of corpus callosum. See (lyrus 



subcallosus. 

 of superior olive, 201 

 Perikaryon, the protoplasm sur- 

 rounding the nucleus in the 

 Cell body of a Neuron. 

 functions of, 99 

 IVrilymph, 1911 



Perineureum, the connective-tissue 

 sheath surrounding a peripheral 

 nerve . 

 Peristalsis, 241 

 Peritoneum, 80, '_'."><) 

 IV- pedimculi. See Basis pedunculi. 



