40 JOHN SZENTAGOTHAI 



microphotograms b, c and d. The main synaptic system of the column 

 derived from muscular afferent neurons entering the cord in lower levels are 

 strange parallel contact synapses of unusual length with occasional very large 

 terminal knobs. They have been called "giant synapses". Their peculiar 

 character is clearly revealed after lower lumbar dorsal root transection 



Fig. 10 



