350 



INDEX AND GLOSSARY 



Substantia alba. Sec Matter, white, 

 gelatinosa Rolandi (gelatinous sub- 

 stance of ROLANDO), an area of 

 Neuropil bordering the dorsal 

 gray column of the spinal cord; 

 sometimes also applied to the 

 nucleus of the spinal V tract in 

 the medulla oblongata, 129 

 grisea. See Matter, gray, 

 nigra (black substance), an area of 

 gray matter immediately dor- 

 sal of the Basis pedunculi, 

 functionally related to the 

 cortico-pontile tracts, 161, 165, 

 107, 210 



perforata, anterior (anterior per- 

 forated substance or space), 

 a region on the ventral sur- 

 face of the brain in front of 

 the optic Cniasma which is 

 pierced by many small arte- 

 ries, 120, 219, 300 

 posterior (posterior perforated 

 substance or space), a region 

 on the ventral surface of the 

 brain between the Bases pe- 

 dunculi which is pierced by 

 small arteries, 120 

 Subthalamus, the ventral part of 

 the Thalamus, 1(5:3, 165, 166, 1G7, 

 174, 176, 3<X> 



Sulcus, in the cerebral cortex, a 

 superficial fold not involving 

 the entire thickness of the brain 

 wall; cf. Fissure, 266 

 anterior parolfactory, 119 

 central (fissure of ROLANDO, cru- 

 ciate sulcus), 119, 121, 281, 282 

 cinguli, 119 

 corporis callosi, 119 

 cruciate. See Sulcus, central, 

 frontalis, inferior, 121 



superior, 121 

 interparietalis, 121 

 limiting (sulcus limitans), a longi- 

 tudinal groove on the ventricu- 

 lar surface of the embryonic 

 brain separating the dorao- 

 latcral sensory Plate from the 

 ventro-lateral motor Plate, 30, 

 117, 118, 120, 153, 181 

 occipitalis transversus, 121 

 posterior parolfactory, 119, 219 

 precentralis, 121 



Sulcus rhinalis. See Fovea limbica. 



spiralis, 197, 198, ljy 

 Summation, central. See Conduc- 

 tion, avalanche, and Reinforce- 

 ment. 



of stimuli, the enhancement of 

 effect by repeated stimulation, 

 59, 62, 03, 192, 208, 218, 258, 

 200, 208, 307 



Suprasegmental apparatus, the cere- 

 bral cortex and cerebellum with 

 their immediate dependencies, 

 113, 120, 123, 143, 158, 186 

 Susceptibility of neurones to poisons, 



97, 231 



Swallowing, apparatus of, 78, 247 

 SYLVIUS, aqueduct of. See Aqueduct 



of Sylvius. 



fissure of. See Fissure, lateral. 

 fossa of. See Fossa lateralis. 

 Symbolizing, defects of, 292 

 Sympathetic nervous system. 



Nervous system, sympathetic. 

 Synapse, the place where the nervous 

 impulse is transmitted from one 

 neuron to another, 50, 51, 52, 

 53, 54, 90, 97, 103, 109, 190, 

 218, 231, 252, 20s, 209. 272, 295 

 fatigue of, 102, 103 

 time of transmission through, 54, 



98,99 

 Synergic muscles. See Muscles, 



synergic. 



System, functional, all neurons of 

 common physiological type. Most 

 peripheral nerves contain several 

 components belonging to different 

 systems, 145-150 



Tabanus bovinus, nervous system of, 



30 



Taenia, the line of attachment of a 

 membranous part to a massive* 

 part of the brain wall; formerly 

 applied also to some fiber 

 tracts, as Ta-nia semicircularis 

 = Stria terminalis, and Ta-nia 

 thalami = Stria medullaris 

 thalami. 



chorioidea, the line of attachment 

 of the lateral chorioid Plexus to 

 the medial wall of the cerebral 



