. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COMPUTATION IN CEPHALOPOD LEARNING SYSTEM 203 4 tests tests -, 24 smooth + fish 1 smooth + fish 1 i£ -/ "5 73 »_* (M 33 *™ v».-'*'^ CJ c rough, "~\ C v M no reward 5 2 — V-* 12 _^ >v w -5 .-*-, rough x-,+ shock jj 03 \ E V-*., 'v_ 11+12 21+2'_ 1 t n ! ! I 1 1 1 1 1 1 II 1 1 ! 1 1 1 1 ! II n 1 5 10 13 15 20 day Figure 5. Sequence oflearning by 129 control half brains to take a smooth ball and reject a rough. Four trials daily. On days 11 and 12. and 21 and 22, the figure shows mean takes out of 24 unrewarded test
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COMPUTATION IN CEPHALOPOD LEARNING SYSTEM 203 4 tests tests -, 24 smooth + fish 1 smooth + fish 1 i£ -/ "5 73 »_* (M 33 *™ v».-'*'^ CJ c rough, "~\ C v M no reward 5 2 — V-* 12 _^ >v w -5 .-*-, rough x-,+ shock jj 03 \ E V-*., 'v_ 11+12 21+2'_ 1 t n ! ! I 1 1 1 1 1 1 II 1 1 ! 1 1 1 1 ! II n 1 5 10 13 15 20 day Figure 5. Sequence oflearning by 129 control half brains to take a smooth ball and reject a rough. Four trials daily. On days 11 and 12. and 21 and 22, the figure shows mean takes out of 24 unrewarded tests with each ball (Young, 1983). The basic action of the system is that an arm cautiously and slowly draws in an unfamiliar object that it touches. If this proves to provide food, the taste signals from the lips activate cells of the lateral inferior frontal, which in- crease the tendency to take and perhaps operate as a com- petitive learning matrix (like the dentate gyrus). The pat- tern of input and taste signals is then passed on to the median inferior frontal where that proportion of cells that receive this pattern of signals of touch and taste is acti- vated. This can be considered a re-coding of the input pattern on to a more sparse set of cells. The axons of these cells then proceed through the inter- weaving bundles to the subfrontal, where they make con- nection with a still smaller set of large cells with complex dendritic fields, having also an input of fibers indicating pain. If trauma occurs and these pain fibers are also ac- tivated, then the large cells of the subfrontal operate the rejection neurons of the posterior buccal lobe. The syn- apses activated by this particular pattern of input become consolidated, presumably by the action of the large num- ber of amacrine cells whose short axons end among the dendrites of the larger cells of the subfrontal lobe (Fig. 6). The basic operation of the system is thus to take objects touched unless signals of pain a
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
