sistem limbik
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SG/March/01
SISTEM LIMBIKSISTEM LIMBIK
Romy Deviandri
Department of PhysiologyMedical Faculty- Riau University
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SISTEM LIMBIK Limbik: perbatasan Struktur di sekeliling regio
basal serebrum Mengatur:
Prilaku Emosi Motivasi Homeostasis Memori
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STRUKTUR SISTEM LIMBIK HIPOTHALAMUS SEPTUM AREA PARAOLFAKTORIA EPITHALAMUS NUKLEI ANTERIOR THALAMUS GANGLIA BASALIS HIPOKAMPUS AMIGDALA
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HIPOTALAMUS
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HIPOTALAMUS: FUNGSI PRILAKU
Hipotalamus lateral Rasa Haus dan Lapar meningkat Agresif Marah
Ventromedial Rasa Kenyang Tenang
Nuklei Paraventrikuler Rasa takut dan terhukum
Anterior dan Posterior Seksual
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Pusat afektif sistem limbik mengatur hasrat, rasa enggan, motivasi mengatur aktifitas tubuh
Tranquilizer menekan sistem limbik afektif menurun
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Hubungan dengan Proses Belajar
Stimulus (Belajar) tidak merangsang afektif acuh
Stimulus (Belajar) merangsang afektif penguatan stimulus jejak ingatan menguat
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Hipokampus Bagian medial korteks
temporal yang memanjang Stimulus hipokampus
talamus ant hipotalamus forniks
Rangsangan hipokampus mempengaruhi prilaku
Dapat terangsang berlebihan kejang lokal
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Hipokampus - Belajar
Peran penting dalam konsolidasi ingatan menjadi ingatan jangka panjang
Kerusakan: Amnesia anterograd dan retrograd
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Amigdala Terletak di bawah kortek tiap
pole medial ant lob temporal Menerima stimulus dari
korteks limbik, terutama area asosiasi auditori dan visual
Rangsang gerak involunter (tonik, klonik,
ritmis Afektif, seksual
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Kerusakan amigdala Kluver Bucy Syndr Memeriksa objek dengan mulut Hilang rasa takut Agresifitas menurun, jinak Kebiasaan makan berubah Buta psikis Sesualitas meningkat
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Korteks Limbik
Area asosiasi mengatur prilaku
Kerusakan: Korteks temporal ant: Kluver
Bucy synd Frontal orbita post: insomnia,
gelisah Girus singulata dan subkalosal:
pemarah, agresif
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SEKIAN
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