/"c-=0c-4 



3t=(p^+F6c 



Fig. 6. Functional diagram of the mechanism underlying localization in mantids. 

 The hypothesis is developed by steps from (a) via (b) to (c). (a) Optic feedback 

 loop only. As indicated by the arrows, information flows from the optic unit (ampli- 

 fication factor: A (opt)) to the neck motor unit (amplification factor: A (neck)) 

 and again to the optic unit, (b) Optic and proprioceptive feedback loops. The neck 

 motor unit is controlled by the difference between the optic {<p^) and the propriocep- 

 tive (3J center messages, (c) Complete hypothesis. A fst^okei amplification factor 

 of the central unit which determines the direction of the stroke (/c). For full explana- 

 tion see text. 



