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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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<strong>The</strong> post-oFerative testíng sèssiors in rhe preseat study<br />

dj.d not cc[ìlence until '19 daTs aft€r tàe I€síoe. By that<br />

tiae the possj-b1e disruptioo in the ventricular f la¡t<br />

rould have recav.red. S€cond., Erggrs { (19?6?} stuìly al-sc<br />

inpl,icât€al the ante¡ior thixd ve¡tricle at thê precpt.ic<br />

anil hypothalalic level as th€ active sLte <strong>for</strong> angioten-<br />

sía. the <strong>for</strong>rth vêntricl€ and the postefiot ìhi¡d<br />

vèntricl€ ¡l€r€ withcut any active sit.es. Anil third,<br />

N€ill et al {!974) ccmpar*d the effects <strong>of</strong> frontal,<br />

strJ-ata1, a¡al septa.l Lesicns in paradigns thought to<br />

neasure incentiv€ rìotivatic¡ cT b€havioural iahibíti|]rr.<br />

Thê r€su]-ts shor€d tììat rats Hith fxontal or striatal<br />

lesions l,h:ich increas€d resfonding far ¡eHards in many<br />

operant- paradigns d1d n¡t süfficiertly increase th€ir<br />

rat€ <strong>of</strong> vat€¡ cc¡sunption,rate <strong>of</strong> acguisition o¿ sac-<br />

charine drinkirg, latency to €at in a novel- enrironm€nt<br />

or acquisition <strong>of</strong> Eunl,ay r€spo sÊs. <strong>The</strong>y concludeal that<br />

nthe tehavioL.¡al chãng€s sê€r:] attêr strietal_ cr frontal<br />

danaqe in thê rat are not d{€ to ênha¡c€(l respoÈsívitlr to<br />

rêsarili¡g stinulitr. Thus, :t is more tikely that CD<br />

per<strong>for</strong>maace eas d.üe to disruption <strong>of</strong> brairi str$ctures<br />

concerned eith temporal discri{¡isat j"oÐ tharì to any<br />

i¡dir€ct effect cn aotiyationå1 systens"<br />

219

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