The anatomy of the nervous system, from the standpoint of development and function . r dendrites. B, Tricellular glomerulus. C, Neuron surrounded by subcapsulardendrites. Intracapsular dendrites are numerous in the sympathetic ganglia of rare in those of mammals (Marinesco, 1906; Cajal, 1911; Michailow, 1911;Ranson and Billingsley, 1918). Beneath the capsule these dendrites may forman open network more or less uniformly distributed around the cell (Fig. 251. they may be grouped on one side of the cell, causing a localized bulging inthe capsule (Fig. 251, A, a). Such a localized ma
The anatomy of the nervous system, from the standpoint of development and function . r dendrites. B, Tricellular glomerulus. C, Neuron surrounded by subcapsulardendrites. Intracapsular dendrites are numerous in the sympathetic ganglia of rare in those of mammals (Marinesco, 1906; Cajal, 1911; Michailow, 1911;Ranson and Billingsley, 1918). Beneath the capsule these dendrites may forman open network more or less uniformly distributed around the cell (Fig. 251. they may be grouped on one side of the cell, causing a localized bulging inthe capsule (Fig. 251, A, a). Such a localized mass of subcapsular dendriteswith interlacing branches is known as a glomerulus. Following Cajals classifi-cation we may distinguish four types of glomeruli according to the number of 342 THE NERVOUS SYSTEM neurons whose dendrites enter into their formation, namely, unicellular (, A, a), bicellular, tricellular (Fig. 251, B), and multicellular glomeruli. Shortintracapsular dendrites with swollen ends are sometimes present in the sym-pathetic ganglia of mammals (Fig. 252, A).. Fig. 252.—Sympathetic ganglion cells showing various types of dendrites. Redrawn fromMichailow. Methylcne-blue stain. A, From superior mesenteric ganglion, horse; B, from celiacganglion, horse; C, from stellate ganglion, horse; D, from superior cervical ganglion, dog; E, celiacganglion, horse; F, superior cervical ganglion, dog. Extracapsular dentrites pierce the capsule, run for longer or shorter dis-tances among the cells, and help to form an intercellular plexus of dendritic andaxonic ramifications (Fig. 251, A). These dendrites may end in a variety ofways. Some of these types of endings may be enumerated as follows: (1)brush-like endings (Fig. 252, A); (2) plate-like or bulbous terminals applied I 111 S\ Ml\ IIII in M l:\ I ; |\[ 343 against the outer surf ace of the capsule of another cell I /; i \ inter lacing branches, which form a plexus upon the outer surface of the capsule ofan adjacent ce
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
