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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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¡ent in th task. Th€ se"êrj-t.y cf prê¡ron+-al inpairaelit<br />

is a furction <strong>of</strong> th€ d€gre€ cf motcr j.nvolrenent in the<br />

response prcc€sses,<br />

If Èhe cci]-ateral $edj.ati¡g tehavicur and Ìlnêsthetj.c<br />

in?uts play â critical E c.l,e i¡ terpo¡al- discxininatian<br />

and d€l-ay€d E€spc¡ses, th€r disxuptio¡¡ <strong>of</strong> neüral substr*<br />

atê essenti-âl to patt€rnêil ¡€sFcrìsê events nould also<br />

caì¡se åisr{pticfi, t€ûporary or pê.rüaâent, cf tinif¡g<br />

bêhaviour ard/or d€layed r€spcrs€. fhi-s is one <strong>of</strong> the<br />

najor ínt€rc€sts .f the pr€s€nt papeË. For thís purpose<br />

the cerebellar pathffays and n cl€i i{h¿ch a¡e ÍrflpLicated<br />

in motcr/posr-urã1 eve{rts rd€re stüdieal .<br />

ånatorûica1 cÕ¡síd€ratiols<br />

Ànatonical1y, tþe cêrëbË1,1T!rì can i.ye divided i¡to<br />

threÈ najor s€clions, Ícllo ing JanÊen a¡d BroüaL rs<br />

conceft <strong>of</strong> lcngiturlinal crrticrûüclear organizatiot¡ <strong>of</strong><br />

cerebel-lum {1940, 191t2} . 1l}¡is ccncept stressêd the iupor-<br />

ta¡ce cf 1Õ.alizatiotl in ti¡€ effsrent corticonuclear<br />

projections rather than rtist¡itrutioû cf affêrent fib€rs<br />

in the c€rebeIIar cortêx ir¡ the intèrprêtations <strong>of</strong><br />

r€sults cbtained by stinu.Iatioa anil ablation. Using cats<br />

as subjects, Jônseû and Brooã1 shor¡ed thaÈ thère is a<br />

m€dia1 zoDe {vernal co¡tex and fasij-gial nuclêus) tregu-<br />

latinE th€ Þosture, tor¡e, Locomotion and equilibriue <strong>of</strong><br />

the ertire t ûdy. <strong>The</strong> i¡termediate zon€ {paravermal.<br />

cortex and Í¡te¡positus nüclëus¡ r€guìated lhe spaciaLl_y<br />

38

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