156 



INTRODUCTION TO NEUROLOGY 



We cannot here undertake an analysis of the complex reflex 

 connections of the medulla oblongata. In general, each of the 



Nuc. dorsalis vagi 

 Nuc. fasc. solitari 

 Fasc. solitarius 



Nuc. fasciculus 



cuneatus 



Nuc. XII 



Spinal V nuc. 



Spinal V tr, 



Nuc. sal. inf. 



X root 



Nuc. ambiguus 



Reticular 

 formation 



Inferior olive 

 XII root 



Ala cinerea 

 Trigonum hypoglossi 

 Nuc. vestibularis spinalis 



Fasc. long. med. 



Lemniscus V 



Fig. 73. Diagrammatic cross-section through the human medulla 

 oblongata at the level of the vagus nerve, illustrating details of functional 

 localization in addition to those shown in Fig. 72. 



Visc. mot. col. 

 Som. mot. col. 



Area acustica 

 Nuc. fasc. sol. 

 Nuc. dors. X 

 Fasc. solitarius 

 Cor. restiforme 

 Spinal V tract 



Cutan. root X 

 Vise. sens, root X 

 Vise. mot. root X 

 Nuc. ambiguus 

 Reticular form. 

 Inferior olive 

 XII root 



Fig. 74. Diagrammatic cross-section through the adult human medulla 

 oblongata at the same level as shown in Fig. 73, for comparison of the 

 arrangement of the principal functional columns with that of Figs. 69 

 and 70. 



primary terminal nuclei of the sensory roots of the cranial nerves 

 effects four types of connections: (1) direct reflex connections 



