MODES OF TERMINATION OF NERVE-FIBRES 



85 



plexuses is most characteristically seen in the cornea of the eye. The 

 nerve-fibrils may be brought distinctly into view by staining with 

 chloride of gold, and then the nbrillar structure of the ramifications of 

 the axis-cylinders also becomes very apparent. 



FIG. 107. NERVE-ENDING IN MUSCULAR FIBRE OF A LIZARD (Lacerta 



viriclis) 



a, end-plate seen edgeways ; b, from the surface ; s, s, sarcolemma ; p, p, expansion of axis- 

 cylinder. In 6 the expansion of the axis-cylinder appears as a clear network branching 

 from the divisions of the medullated fibres. 



I 



' 



FIG. 108. TERMINAL RAMIFICATIONS OF THE AXIS-CYLINDER IN END-PLATES 



OF MUSCLE, STAINED WITH CHLORIDE OF GOLD. (Ranvier.) 



Ending of motor nerves. Lastly the nerves to muscles also ter- 

 minate either in special organs or in plexuses. The latter is the case 

 with the nerves going to involuntary muscle, and l^ere the primary 

 plexuses are generally furnished with ganglion-cells in abundance. 

 From these other nerve-fibres pass which form secondary plexuses and 

 terminal ramifications amongst the contractile fibre-cells. These 

 nerves will be more fully studied in connection with the intestine (see 

 Lesson XXIX.) 



