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

Pr€-operat j,qely the r€sFo¡se cf t..he syslea in the
tj-ne ðcnaj.n is si$i.Lar to the systêns descri¡ed i$
pEevj-ous sections. The rê1atìvç error of the system 1aas
reducëd oì'er tj-me as a functj.o¡ af thê I//O control aed of
practice {figur€ 50). Post-cpeEatj-yely, there Eas alì
ircreas€ in the relâtiv€ €Êror shen conpated Èo the
pre-operative leveL. Ho{¡€ver, t.he generaì forms of thÐ
trajectcries ¡erê sti1l nÍr.or inages of each othêr
Figure 51 is the P pl-ot of the ft systeE bef,oEe the
lesio¡. the f/t co¡trû1 etfectively co¡strictêd r€lativê
error of, t.hÈ systeüi to a lla!ro:{ r:angê. Posl-op€ratively
the .rêsFonsê of thè syst€ìn shoued a te&d€r¡c1 to oscillat€
tordards shorter ].at€nci€s {figure 52). flo{rever Èhi.s
tendêncy rias hÐld u¡de¡ ch€ck hy the flo control. gi+-}¡
the renoval of t.he I/O contËol the behavioutral syst€n
.È:xhilrited a shift toeald. thê pr€-operative pre-tr/O tlas€-
liÐe l€v e l.
{5) DFlÐ r !s s:
PrÊ-operåtivèly the slst€n noved. toÐa¡d an unstable
focus anå tbe¡ì diverged toeard progressive legthenilg of
the respcnse latencies,shoring the prèdoninatinq force of
extinction üuring ttris phas€ of t,h€ exp€rioent {fi-gur€
53) , Post-operativeJ-y, th€ system sbou€d a slighÈ tên-
denry to cvershoct,a sharâõtert-- stj.c of a s1j.ghtly
ll]ßdêrda p€d system {figure 54). 8ut thê flo coãtrol
quickly restrict€d t¡e e¡¿o¡ and the phase velocity of
thè traj€ctory of the systeßì rias precipitatèd into a
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