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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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organized mÐv€ment and skill€d move.nênt, tcnes, anil<br />

posture associat€d Hith trcv€!ìents <strong>of</strong> the ipsiLateral<br />

linbs. ¡ach lat€ral zo¡e {h€nisFh€ric co¡tëx and CênÈate<br />

lucleus) is invoLv€ð in th€ saee skilted and spacial.].y<br />

organiz€d scv€ment <strong>of</strong> th€ ipsilatereL Linbs ¡{ithout any<br />

appar€nt regulatio! Gt thèjr pcsture ar¡d tone. cooiì.nan,<br />

Hal,lett and Hê1ch {'1963) us€d 3? fenale aduLt albino rats<br />

to stu(lf the o¡gafl.aza+_ion ct cerebellun. ?heir stutly<br />

confirned Jarsêlr and BrodaL rs so.rk, sith thè exception<br />

that thå interm€diate and lateral sones ia the rat are<br />

not as cl€axly d€fin€d as those in the cats" Such<br />

sübdivision o the cerêþèl1üm j.nto longituðina1 zones j.s<br />

alsc associate,l liiÈh a l0calizati-on <strong>of</strong> the cortico¡riclear<br />

projêctions i¡ a rostro-caudal d'irectioil.<br />

Scberts (1967) traced the cutgoíng pathHal¡s f .ro$ the<br />

¿lê¡tat€ nucl€us" ThÊ gr€at€r part Ðf tàe outfloc uas<br />

reprrted to xun frcå the cere.bellar cortêx to f_he deep<br />

¡uc1ei <strong>of</strong> the cêretlellum. ?hè dentate aucleus recei_yes<br />

its afferent input trcE th€ lat€ral zone a¡d. fro¡¡ parts<br />

<strong>of</strong> the extrapyfanidal systeß, arrd from th€ red nucleus,<br />

the pathvay in êach casê rela]¡i¡g i¡ Làe infericr alivê.<br />

fhe outflolr cf the dÈntat€ nucleüs runs in Èhe superior<br />

ce¡ebê11-a¡ peduncle, back tÐ tt¿ë red nucleus <strong>of</strong> thê<br />

oFposÍte side and tÒ th€ basal gangi-ia. Thus it fcrns a<br />

re.lay sfatj"r¡ <strong>for</strong> at least tHÕ loops in the êxtrãpyranåd_<br />

a]. systên. flcuèver, j.t dÕes not necessari1y neaD Èlrat<br />

thcse st.ructuxes op€rat€ in f eeilbac.k aad stabilizi.ng

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