50 



INDEX 



Nerves, spinal, peripheral, dorsal branch of, 



457, 460 



ventral branch, 457, 460 

 Nervous system, the 417 

 anomalies of, 530 

 anterior neuropore, 421 

 brain, 423 

 central distinguished from peripheral, 



419 



cerebrospinal ganglia, 421 

 components of, afferent and efferent, 417 

 derivation of, 421 

 epichordal segmental brain and nerves, 



429 



general considerations of, 417, 418 

 human, 459 

 nerve fibers, 421 

 neural crest, 421 



folds, 421 



groove, 421 



plate, 421 



tube, 421 



primitive nervous mechanism, 418 

 root fibers of, 421 

 spinal cord and nerves, 423, 427 

 three-neurone reflex arc, 420 

 two-neurone reflex arc, 418 

 vertebrate, 420 

 central, 419 



suprasegmental structures of, 420, 427 

 human, afferent peripheral and sym- 

 pathetic neurones, 459 

 anomalies of, 539 

 cell proliferation of, 449 

 cerebellum, 425, 427, 436, 482, 495 

 corpora quadrigemina, 437 487, 500 

 development of the lower (interseg- 



mental) intermediate neurones, 472 

 differentiation of peripheral neurones of 



cord and epichordal segmental brain, 



456 

 early differentiation 



of nerve elements, 453 

 epicordal segmental brain, 482 

 epithelial stage of, 449 

 further differentiation of neural tube, 



476 

 general development of, during first 



month, 442 

 histogenesis of, 448 

 spinal cord, 476 

 peripheral, 417 

 effectors of, 418 



Nervous system, peripheral, receptors of ; 418 

 sympathetic, 428 



efferent peripheral visceral neurones of, 



421 



vertebrate, bilateral character of, 420 

 cephalization, 420 

 general features compared with human, 



427 



general plan of, 420 

 segmentation of, 420 

 typical, 420 

 Neural crest, 60, 421, 460 



relation to cerebrospinal ganglia, 421 

 segmentation of, 421 

 separation of, 421 

 folds, 63, 64, 81, 97, no, 421, 442 



fusion of, 421, 442 



groove, 64, 81, 98, 101, 103, no, 421, 442 

 plate, 41, 42, 61, 63, 75, 81, 421, 442 



differentiation of, 423 

 tube, 41, 43, 64, 81, 99, 104, no, 421, 442 

 alar plate, 447, 482, 485, 489 

 basal plate, 447, 482, 484 

 blood vessels of, 478 

 cells of, 449, 451, 453, 454 

 cervical flexure, 448 

 defects in the region of, 615 

 floor plate of, 423, 443 

 further differentiation of, 476 

 lateral plates of, 423, 443 

 layers of, 449, 455, 484 

 limiting membranes of, 449 

 neuromeres, 426, 447 

 order of development of, 448, 476, 485, 



489, 512 



origin of malformations of, 615 

 roof plate of, 423, 443, 483 

 sulcus limitans, 447, 482 

 Neurenteric canal, 43, 64, 101, 286 

 Neurilemma, 448, 462 

 Neurilemma, cells of, 462 

 Neuroblasts of His, 455 

 Neuro-epithelium, 551, 556 

 Neurofibrils, 448, 454, 459 

 Neuroglia cells, 451, 455 



fibers, 453 



Neuromeres, 426, 447 

 Neurone layer, see Mantle layer 

 Neurones, afferent peripheral, 417, 427, 459 to 



472 



afferent versus efferent, 427 

 association, 427, 438, 498, 500, 528 

 central, 419 



