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The EffĘcts of In Partial 3ėĄLfil1n€nt of Tle B€qüireûents for Eh ...

The EffĘcts of In Partial 3ėĄLfil1n€nt of Tle B€qüireûents for Eh ...

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ior t.he t.hal"amus. ri{hi}e stíEu"Lation produced cessat'iÐr¡<br />

<strong>of</strong> cordii-ic¡ed response, thalanic siinulatioa had nuch<br />

less effect cÐ tlìe rìor€ tnatural, noveneíìts sllch as<br />

food-seizi¡g , h€aal türû1n9, che¡¡i g anit wa.].king. caudate<br />

st.iü¡ulatiûn shor€d nc €ffêct Ðn these ,nat'üa1l<br />

soveú€nts. thå authôrs al_sc r€port€ð a close correlation<br />

betseên el€ctroph?sio1Õgical and behavioural effects.<br />

Threshcld fcr s¡tppressj-on <strong>of</strong> t.be coBiti.tioned novêsl€rt a¡d<br />

fox cortical- rspindlingr afpeaf,ed to bê <strong>of</strong> thÊ sain€<br />

magrj-tude. Thì¡s, s.iüiJ'â r to the pceviously q{oted<br />

experinenters, the aüthors co¡sidered. t<strong>Tle</strong> caudate Dùcleus<br />

a d the nídli¡e thalanic aucLei thè iBportant c€nters <strong>for</strong><br />

respons€ inhitition, <strong>of</strong> condÍti.n€C bêhavioür. Bùchva1d,<br />

Ron€ro-Siêrra, Hull a.nd çak€fi€tð {19ó?} sho¡{ed furthêr<br />

that stioulati{r¡ cf bsth tbe caudate nucLeus aïtd Õf the<br />

yentroLateral tbalaaic nucl€us could sÊrve as a discri-<br />

minatirê stinuL{s <strong>for</strong> eåther th€ plesenc€ or abs€ncê <strong>of</strong><br />

rêinfcrcene¡t. Such CS çuãlity cf centlal stinulaÈioÐ<br />

couLil opposÊ tb€ innat€ Ínhj-bitaÊT €ffêcts <strong>of</strong> stinulatioã<br />

Ðpon crert behâviour. Based on th€se obserya tiors, t hey<br />

ârguçd that thêre is a co¡sld€rablê ovèrLap <strong>of</strong> neûral<br />

e:.enerits stirsuì.atèd by the iflhibitory stinulüs and by tåe<br />

lêarneð stiBulus.<br />

<strong>In</strong> tb€ '1957 papê¡, túch!¡al

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