5-19 Fungsi Sistim Saraf Motorik & Sensorik
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FUNGSI SISTIM SARAF
MOTORIK & SENSORIK
OLEH
Dr. ZURAINI, Sp.S
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Sistim motorik : m!"#r#s pr"r$k$!
R$!"k$i$! !#ro! & otot :
% Uppr motor !#ro! UMN'
% Lo(r motor !#ro! LMN'% S$m)#!"$! s$r$* & otot
% otot
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Uppr motor !#ro! UMN'
N#ro! " m!$-#rk$! imp#-s motorik kLo(r Motor N#ro!, )r$s$- $ri kortks
m!#r#! m-$-#i pir$mi $ri m#-$
o)-o!"$t$.
Uppr motor !#ro! i)$"i :
/. Sistm 0ir$mi$-is2. Sistm kstr$pir$mi$-is
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Sistim pir$mi$-is s-2 s$r$* motorik $ri
$r$ motorik kortks$r$ 1 )ro$m$!!' "
tr-t$k i "r#s prs!t$-is 3 $kso!2!$ t#r#!
k)$($4 s- motorik i )$t$!" ot$k & kor!#
$!trior m#-$ spi!$-is.
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Sistim pir$mi$-is :
Tr. Kortiko)#-)$ris6rsi!$ps i)$t$!" ot$k & m-$-#is$r$*2 kr$!i$- $k$! mmprs$r$*i otot2
$r$4 kp$-$ m#k$, r$4$!", -i$4 s)'.
Tr. Kortikosp!$-is
6rsi!$ps i -7-2 trt!t# m#-$ spi!$-is &
s$r$*2 spi!$- otot2 )$$! & kstrmit$s/. Tr. Kortikosp!$-is -$tr$-is
2. Tr. Kortikosp!$-is 7!tr$-is
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Korteks motorik (gyrus Presentalis
Sistem piramidalis = berkas saraf yg padat
Diensefalon (kapsula interna)
Mesensefalon (berkumpul dibagian tengahpudunkulus serebri
Pons (basis pontis)
Medula oblongata
Traktus kortiko Bulbaris
Nukleus kranial
Traktis kortiko spinalis
Medula spinalis
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Lo(r motor !#ro!
N#ro! " m!$-#rk$! imp#-s motorik
$ri
% I!ti2 s$r$* kr$!i$- k otot2 ($;$4 & -4r
% I!ti2 r$iks s!tr$-is s$r$* spi!$- k otot2
i t#)#4 & $!""ot$ "r$k
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=ARAS > =ARAS ASENDENS
TR. Ko-#m!$ ors$-isFASIKULUS GRASILIS
FASIKULUS KUNEATUS
TR. S0INOTALAMIKUS
TR. S0INOSERE6EL. DORSALIS
TR. S0INOSERE6EL. ?ENTRALIS
TR. spi!ortik#-$ris
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=ARAS > =ARAS DESENDENS TR. 0ir$mi$-is kortikospi!$-is TR. ?sti)#-ospi!$-is
TR. R#)rospi!$-is TR. Rtik#-#s spi!$-is Sistim oto!om s!! TR. Tktospi!$-is
F$sik#-#s Lo!"it#i!$-is M.
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T$)- 4$- +9+ "root
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=$r$s $s!! m#-$ spi!$-is: tr$kt#s
spi!ot$-$mikr$s$ !ri,s#4# $! tk$!
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=$r$s $s!! m#--$ spi!$-is:
*$sik#-#s "r$si-isk#!$t#s-m!isk#s mi$- : #!t#k
propriospsi
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aras asenden med.
spin. ke serebelum:
traktus spinoserebelar
untuk propriosepsi
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=$r$s s!! : tr$kt#s kortiBospi!$- C tr$kt#s pir$mi$-
prs$r$*$! motorik otot sk-t
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=$r$s s!!:Tr$kt#s kortiko)#-)$ri!r7$si
i!tii!ti s$r$* ot$k
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Sistim Ekstr$pir$mi$-
M($ki-i sm#$ ;$r$s motorik " tk
)r;$-$! m-($ti pir$mi$ m#-$
0!ti!" mmp!"$r#4i sirk#it #mp$!
)$-ik motorik r"#-$toris -m m#-$
spi!$-is, p#s$t ot$k, sr)-#m & kortks
sr)ri
Tr$kt#s tktospi!$-is, r#)rospi!$-is,rtik#-ospi!$-is, 7sti)#-ospi!$-is, --
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Sistim kstr$pir$mi$- m!$m)$4 sistim
kortik$- $ri kr;$ 7o-#mtr motorik m!i!"k$tk$! *#!"si!$ kti!"k$t " -)i4ti!""i"r$k$! 7o-#mtr 4$-#s & -m)#t
6rtm# "! TR. 0ir$mi$-is p moto!#ro!kor!# $!trior "! m!"$kti7$si &s)$"i$! m!"i!4i)isi
Kr#s$k$! TR. 0ir$mi$-is i-#$r $r$4 pir$mi$ s-$-# m-i)$tk$! sr$tktr$pir$mi$-is
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Sistim som$tos!sorik
R$s$ s#pr*isi$- : r$)$, !ri, s#4# & iskrimi!$si 2
titik R$s$ $-$m : posisi otot & s!i propriospsi',
!ri otot $-$m, 7i)r$si.
R$s$ 7isr$- : -$p$r, m#$-, !ri 7isr$-
R$s$ k4#s#s : p!"4i#, p!"-i4$t$!, p!!"$r$!,
p!"B$p$! & ksim)$!"$!
RASA 4 JENIS
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Rsptor
T#"$s rsptor, mr#)$4 )r)$"$i ;!is
"$$ : mk$!ik
kimi$ imp#-s s$r$* t4rmik
-ktrik
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Rsptor
M!#r#t ?o! Fr :
% Rsptor )rsi*$t k4#s#s.
% Sti$p rsptor )r4#)#!"$! !"$! s#$t#trmi!$- tpi sr$)#t s$r$* $**r!.
A$ + m$B$m rsptor :
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I. Ekstrosptor + ;!is'
/. T$!"osptor p!rim$ s!t#4$!' :
A. $-$t $ri Mrk-.
6. $-$t $ri Miss!r.. sr$)#t pr$s$ p$$ $k$r r$m)#t.
2. Trmorsptor :
A. $-$t $ri R#**i!i p$!$s'.
6. $-$t $ri Kr$#s i!"i!'.
+. Nosisptor :
Fr Nr7 E!i!" !ri'.
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II. 0ropriosptor
/. Kr#B#t otot m#sB- spi!-' : p$$otot.
2. A-$t "o-"i : p$$ t!o!.+. A-$t p$Bi!i : p$$ s$r#!" t!o!,simp$i s!i, priost, prito!#m,
p-#r$, priB$r.
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III. I!trosptor
U;#!" s$r$* ))$s $ri s#s#!$! s$r$*simp$tik :
p$r#, #s#s, -imp$, 4$ti, pm)#-#4$r$4..ti$k is$$ri.
7siB$ #ri!$ri$, rBt#m,-$m)#!"..)is$ is$$ri.
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Li!t$s$! S!si)i-it$s
R$s$ Nri $! S#4#
Rsptor A**r! R$ik Dors$-is
M. Spi!$-is Si!$ps M!i-$!"
N$ik m-$-#i Tr$k Spi!o T4$-$mik#s L$tT$-$m#s Gir#s 0ost S!tr$-is.
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Li!t$s$! S!si)i-it$s
R$s$ Nri $! S#4#
.
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Li!t$s$! S!si)i-it$s
R$s$ S!t#4$! Ri!"$!
Rsptor A**r! R$ik
Dors$-is M. Spi!$-is
Si!$ps M!i-$!" N$ik m-$-#iTr$k Spi!o T$-$mik#s ?!tr$-is
T4$-$m#s Gir#s 0ost S!tr$-is.
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Li!t$s$! S!si)i-it$s
R$s$ S!t#4$! Ri!"$!
.
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Li!t$s$! S!si)i-it$sR$s$ tk$! $!" $-$m, iskrimi!$si 2 titik, r$s$ "t$r,
prspsi )!t#k
Rsptor A**r! R$ik Dors$-is
N$ik m-$-#i F$sik#-#s K#!$t#s $!
Gr$si-is M. O)-o!"$t$ N#k-#sK#!$t#s & Gr$si-is' Fi)r$ ArB#$t$
m!i-$!" Lm!isk#s Mi$-is
T4$-$m#s Gir#s 0ost S!tr$-is.
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Li!t$s$! S!si)i-it$s
R$s$ tk$! $!" $-$m, iskrimi!$si 2 titik, r$s$ "t$r, prspsi )!t#k
.
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Li!t$s$! S!si)i-it$s
Li!t$s$! 0ropriospti* A. L$!"s#!" m!;$i -!"k#!" r*-ks.
6. /. R$ik Dors M. Spi! Tr$k Spi!o Sr)--$ris Dors
0#!k#-$ris Sr)--i I!* Sr)--#m.
2. R$ik Dors M. Spi! Tr$k Spi!o Sr)--$ris ?!t
0#!k#-$ris Sr)--$ris S#p Sr)--#m .
+. R$ik Dors F$s K#!$t#s $! Gr$si-isM#-$ O)-o!"$t$N#k- G&K' M!i-$!"
Lm!isk#s m T$-$m#s Gir#s 0ost S!tr$-is.
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Li!t$s$! S!si)i-it$s
Li!t$s$! 0ropriospti*
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R*-ks
R*-k rspo! motorik " tr;$i t$!p$is$$ri t4 s#$t# r$!"s$!"$! s!soris.
U!it r*-k trkBi- -!"k#!" r*-k :
rsptor R' !#ro! $*r! A' r$ik postrior !#ro! i!tr!#Bi$- S' r$ik
$!trior !#ro! *r! E' *ktor.
R' or"$! s!soris spsi$-, or"$! #;#!"2s$r$* k#-it $t$# spi!- !#rom#sk#-r.
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A' m!tr$!smisik$! r$!"s$!"$! m-$-#is$r$* pri*r ssp )rsi!$ps "!!#ro! p!"4#)#!".
E' !#ro! " k-#$r $ri SS0 i-m
tr#!k#s s$r$*, m!$mp$ik$! r$!"s$!"$!k *ktor..
E*ktor : otot $t$# k-!;$r "m!"4$si-k$! rspo!.
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=!is;!is R*-ks
R*-ks s#pr*isi$- k#-it & s-$p#t -!ir'
R*-ks t!o! r*-ks $-$m
R*-ks 7isr$- or"$!ik'
R*-ks p$to-o"ik $)!orm$-'
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Medula spinalis :Lihat serabut aferen – ganglion spinal(dorsal) –
edula spinalis – serabut eferen – otot
!ontoh : refle"s biseps
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