Organic and functional nervous diseases; a text-book of neurology . ey are very numerous in some neu-rones. Near the cell body they are thick, but as they extend awaythey divide and subdivide, resembling the roots of a tree, until theyend in fine fibrils. The dendrites vary in length, some neurones havingone very long dendrite and many short ones. These variations areshown in Fig. 1. They pursue a tortuous course and are very irregu-lar in their size, shape, and branching. The surface of the dendriteis rough and often nodular, and appears to be covered with small gran-ules called buds or gemmu
Organic and functional nervous diseases; a text-book of neurology . ey are very numerous in some neu-rones. Near the cell body they are thick, but as they extend awaythey divide and subdivide, resembling the roots of a tree, until theyend in fine fibrils. The dendrites vary in length, some neurones havingone very long dendrite and many short ones. These variations areshown in Fig. 1. They pursue a tortuous course and are very irregu-lar in their size, shape, and branching. The surface of the dendriteis rough and often nodular, and appears to be covered with small gran-ules called buds or gemmules. Within the dendrite fine filaments lie 1 The reader is referred to Barkers Nervous System, Appleton & Co., 1898 ; to Ewing,Studies on Ganglion Cells, Archives of Neurology and Psychopathology, 1898, vol. i.,p. 263; to Bailey, Morphology of Ganglion Cells, Journal of Experimental Medicine,1901, vol. V, p. 550 ; to Nissl, Die Neuronenlehre, Jena, 1903, and to Lewandowsky^Handbuch der Neurologic, Bd. I, 1910. /? THE CEREBROSPINAL NERVOUS 1. 23. Neurones, 1, anterior horn of sjiinal cord; 2, optic thaluiniis; 3, posterior spinal ganglion (chickembryo); 4, cerebellum ; 5, cerebral cortex, surface layer. 24 THE STRUCTURE OF THE NERVOUS SYSTEM. Fig. 2.
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