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BRAIN MECHANISMS AND LEARNING 



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Fig. 7 

 Dendro-somatic contact, (a) Schematic drawing reproduced from Fig. 23.4 of Cajal's Texiura 

 del sisteiiia iieri'ioso del hoinhre y los vertehrados. In this figure Cajal drew the ending of the 

 retinipetal fibre on an aniacrine cell and included a dendro-dendritic connection between 

 amacrines and ganglionic cells, {h) This photomicrograph serves to demonstrate the relation- 

 ship between amacrine cells and ganglionic neurones of retina, as well as the ending on the 

 amacrine of one type of retinipetal fibres. The retinipetal fibre ends on the perikaryon of the 

 amacrine and the dendrite D of this cell surrounds the ganglionic cell body G. The retinipetal 

 amacrine synapse is of the currently accepted a.xo-somatic type; the amacrine-ganglionic 

 synapse of the dendro-somatic type. (Cajal's silver method.) 



