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ANATOMI DAN FISIOLOGISISTEM SARAF SENSORI
Oleh : Ns. Fera Liza, M.Kep Sp.Kep.MB
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SISTEM SENSORIK =
SENSIBILITAS, PERASAAN
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Sistem Sensri
Berperan pentin! "t# mempertahan#an#ehi$"pan man"sia terha$ap %aha&a &!men!an'am
A$an&a %aha&a ts% $apat $i#etah"i$en!an 'ara : melihat, men$en!ar,men'i"m,merasa#an rasa n&eri, rasa
ra%a, rasa panas, rasa $in!in $s%. Sistem sensri menempat#an man"sia
%erh"%"n!an $en!an se#itarn&a.
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SISTEM SARAF
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SENSASI (SENSIBILITAS) A*A + :
. Sensasi S"per-sial
. Sensasi $alam
/.
Sensasi 0iseral+. Sensasi #h"s"s
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lan1"tan 2.
1. SENSASI SUPERFISAL(TAKTIL)
= EKSTEROSEPTIF= PROTEKTIF
MEN34R4S : RASA RABARASA N5ERI
RASA S464
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RABA
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N5ERI
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lan1"tan 2
. SENSASI DALAM= SENSASI PROPRIOSEPTIF
MENGATUR :
7 RASA 3ERAK (KINETIK)
7 RASA SIKAP (STATO3NESIA) $ari tt 8 persen$ian
7 RASA 3ETAR (PALLEST6ESIA)
7 RASA TEKAN *ALAM7 RASA N5ERI 9 *ALAM OTOT
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lan1"tan 2
3. SENSASI VISERAL(INTEROSEPTIF)
*ihantar melal"i sera%"t tnm aeren
Men'a#"p :
Rasa lapar Rasa ene#
Rasa n&eri pa$a 0isera
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lan1"tan 2
+. SENSASI KHUSUS
*iat"r leh sara ta# tertent" :
Melip"ti :
7 MEN36I*4 ( N.I)
7 MELI6AT (N.II)
7 MEN*EN3AR 8 KESEIMBAN3AN (N. ;III)
7 MEN3E
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ANATOMI SEL SARAF
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ANATOMI SISTEM SENSORIK
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/ TIN3KATAN NE4RON
*ARI RESEPTOR *I PERIFER SAMPAI KEKORTEKS SENSORIK *I OTAK
AL4R SENSORIK SEK4RAN37K4RAN3N5A A*A / TIN3KAT NE4RON.
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/ TIN3KATAN NE4RON
. Imp"ls %er1alan $ari reseptr $i perier#e %a$an sel ne"rn tin!#at pertama(primer) $i 3AN3LION AKAR *ORSAL
$ari sara spinal.
. A#snn&a men"1" #e sentral,
%ersinaps $en!an ne"rn tin!#at (se#"n$er) $i KORN4 POSTERIORME*4LA SPINALIS ata" INTI 6OMOLO3
*I BATAN3 OTAK
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lan1"tan2
A#sn ne"rn se#"n$er melintasi !aris ten!ah$an men"1" pa$a sisi se%elahn&a (#ntralateral),#em"$ian nai# se%a!ai ARAS SPINOTALAMIKata" LEMNISK4S ME*IALIS men"1" #e sinaps%eri#"tn&a $i T6ALAM4S.
/. Ne"rn $i thalam"s, %iasan&a %er"pa ne"rn
tin!#at ti!a (tersier) terleta# $i #mple#s;ENTROBASAL TALAM4S $an %erpr&e#si melal"i#a#i POSTERIOR KAPS4LA INTERNA KE KORTEKSSENSORIS *I 3IR4S POSTSENTRAL (AREA
BRO*MAN)
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*ISIMP4LKAN
. Sistem sensri# men&ilan!
Inrmasi sensri# $ari separ"h %a$an
%erpr&e#si #e talam"s 8 #rte#s
#ntralateral. Ne"rn tin!#at I %era$a $i !an!lin a#ar $rsal
/. Ne"rn tin!#at II %era$a $i #rn" psterir
me$"lla spinalis
+. Ne"rn tin!#at III $i talam"s
Me7rela& imp"ls #e #rte#s
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RESEPTOR
Mer"pa#an sel7 sel #h"s"s "t#men$ete#si per"%ahan #h"s"s p$lin!#"n!an
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RESEPTOR SENSORIK
. Reseptr e#stersepti
. Reseptr prpisepti
/. Reseptr intersepti
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RESEPTOR EKSTEROSEPTOR
Men'a#"p reseptr &! terli%at ter"tamap$ lin!#"n!an e#sternal, &ait" :
7 Krp"s#es (%a$an Meissner),
7 Krp"s#el Mer#el "t# rasa ra%a
7 B"l%"s Kra"ss "t# rasa $in!in
7 Krp"s#el R">ni "t# rasa panas
7 41"n! sara %e%as "t# rasa n&eri
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6"%"n!an Man"sia *! *"nia L"ar T1$ Melal"i ReseptrSensri# *pt Ber"pa :
1. RESEPTOR EKSTEROSEPTIF
Berespn th$ stim"l"s $ari lin!#"n!an
e#sternal, termas"#
7 0is"al
7 a"$itri
7 ta#til
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. RESEPTOR PROPIOSEPTIF
Misaln&a &! menerima inrmasimen!enai
psisi %a!ian t"%"h ata" t"%"h $ir"an!an
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/. RESEPTOR INTEROSEPTIF
Men$ete#si #e1a$ian internal seperti
per"%ahan te#anan $arah
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Sistem sensri# smati# menerima inrmasiprimer $ari reseptr e#stersepti $an
prprisepti
A$a + s"%#elas ma&r $r sensasismati#, &ait" :
1. Sensasi nyei
$i'et"s#an leh ran!san! &! $apat
men'e$erai (n?i"s)
!. Sensasi s"#" ($e%a&)
ter$iri $ari $ari rasa panas $an rasa
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+ s"%#elas ma&r $ari sensasi smati#, &ait"
/. Rasa (sensasi) si'a
$i'et"s#an leh per"%ahan me#anis $i tt
$an persen$ian, $an men'a#"p rasa si#ap
an!!ta !era# serta !era#an an!!ta !era#(#inestesia)
+. Rasa (sensasi) $e'an *i+e$"s'anleh stim"l"s me#anis &! $i%eri#an p$perm"#aan t"%"h
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a$i %ila seseran! men!alami!an!!"an perasaan $apat $ise%a%#anleh !an!!"an pa$a :
7 reseptr,
7 #n$"#si sara
7 sera%"t sara,
7 tra#t"s
7 $a&a persepsi.
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Any,"es$i-n
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