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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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HhÊn thê sìlFerimposed .I/0 coDr-rol ûas re$oveã, Basèd. on<br />

this graph, j"t can be cônc1ud€d thai +,he systen did not<br />

exhibit any têBdenct totiards returnilg to th€ original<br />

bas€line {lhis ph€ncnenon is unj.gu€ to thê group uhich<br />

borè bilal.êra1 êIèctro.lltic lesion to the E CÐ. À11<br />

other grouFs shcred tendencl to r€turn to the originâI<br />

baseli&€ per<strong>for</strong>nancê upon th€ renoval <strong>of</strong> the T/O coþ-<br />

trol) . <strong>In</strong>st€ad, it €volved ínto a liBit cycfe cf<br />

naíntaifrêd oscillatic¡ $hicb slìcsed Little È€nd€.ncy to<br />

furtler chat]g€s. figures 10 anal 1l a¡e the fùrther<br />

breakdo û <strong>of</strong> the functional analysis <strong>of</strong> the systêo"trigu.rê<br />

10 is thê phase p1âne diagran <strong>of</strong> èhe syst.em bef c.îè th€<br />

s{rgêry. Not€ that th€ fccus sas bel-o}r the p axis<br />

si.gnifying a steâdy t€n¿lency tonards progressJ_vel,y L¡tnger<br />

latencies cith the foÍce <strong>of</strong> €xtiÐctíôn prêalamiÌìat!¡ìg.<br />

flhen tbe xespcnse cf thís syst€¡n tas plott€d as time<br />

rêsFonse {tiqure 12t ,íl shcued a stea¿y tefldency torards<br />

progressive r€tluction <strong>of</strong> valu€ cf the error tern orex<br />

tiße. figure 11 is the phãse plaDe di-agrae <strong>of</strong> ti:e systëü<br />

after the sr¡xgeEy. Às shc{cn ir !hê diagrarn,the systen<br />

€xl¡ibit.€d a sharp trafisient ro ?êlshoôt t ,qhich subsegrent-<br />

1y precj.Fitated intc a linit cycle. As tíme r€spollsê<br />

(figure 13)rit is represented as a ¡ehavj.oural_ systen<br />

characteri"€d by å danpêd oscil-laÈj-on. Based on th€<br />

pre?ious d.iscussion, the systeE ìrndêr study caD be su$-<br />

nÞriz€ð as çossessing a s€ãk stability which, as a x€sÐ1t<br />

<strong>of</strong> thè l"esicn to the $ CÐ ,has so altered its systeft<br />

charâcterj.stic thåt it r+sponed to thê ÐC,A ldith a<br />

ó8

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