Download - ppt anatomi otak.ppt
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ANATOMI & FISIOLOGI OTAKPembimbing : dr. Jovizal, Sp.S
Sami Rahmawati2008730111
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NERVOUS SYSTEM
• CENTRAL NERVOUS SYSTEM• Brain /Cerebrum
• Telencephalon• Cerebral Cortex• Subcortical white matter• Commissure• Basal ganglia
• Diencephalon• Thalamus• Hypothalamus• Epithalamus• Subthalamus
• Cerebellum• Brain stem
• Midbrain (mesencephalon)• Pons• Medulla oblongata
• Spinal cord• White matter• Gray matter
• PERIPHERAL NERVOUS SYSTEM
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Selaput yang memisahkan antara tengkorak dan otak.
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CEREBROSPINAL CEREBROSPINAL FLUIDFLUID
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VENTRIKELVENTRIKEL
Ventrikel merupakan rongga dan saluran yang terdapat di bagian tengah otak.
Didalam ventrikel mengalir cairan serebrospinal.
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PEMBAGIAN OTAK
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CEREBRUM (OTAK BESAR)
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Frontal Parietal Oksipital Temporal
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KORTEKS FRONTAL
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Girus motorik primer/ girus presentralis
Area Broca
Korteks orbitofrontal
Bulbus olfakrorius
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Korteks motorik primer
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Korteks somatosensorik primer/girus presentral
Korteks gustatori primer
Korteks asosiasi somatosensorik
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LOBUS OKSIPITAL
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Korteks visual primer
Area asosiasi visual
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Korteks auditorik
primerAreaa Wernicke
Korteks Korteks olfaktorius olfaktorius primerprimer
Dihubungkan Dihubungkan dengan bulbus dengan bulbus olfakyoriiusolfakyoriius
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Fasikulus arkuatus : Traktus di substansia alba menghubungkan area Broka dan area Wernicke ke lobus temporal, Parietal and Frontal berkoordinasi untuk berbicara . Kerusakan mengakibatkan
Afasia konduksi : pendengaran dan bicara berhubungan namun sulit untuk mengulang pembicaraan
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CEREBELLUM (OTAK KECIL)
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BRAINSTEM (BATANG OTAK)
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Midbrain
Pons
Medulla Oblongata
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BRAINSTEM (BATANG OTAK)
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Pons artinya jembatan terletak antara mesensefalon dan medula oblongata
Fungsi unt .
memodifilasi keluaran
pernafasan oleh medula
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LIMBIC SYSTEM (SISTEM LIMBIK)
A. Cingulate gyrusB. FornixC. Anterior thalamic
nucleiD. HypothalamusE. Amygdaloid nucleusF. Hippocampus
Mengatur emosi dan memori . Langsung berhubungan dengan fungsi luhur dan fungsi lain
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Prefrontal
Limbic system
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Terletak dibawah talamus di pucuk brainstem. Berfungsi mengontrol bbrp fungsi kritis tubuh. Seperti
• kontrol sistem otonom
•Pusat respons emosi dan perilaku
•Mengatur temperatur tubuh
• mengatur intake makanan
•Mengatur keseimbangan cairan dan
haus
•Mengontrol siklus bangun tidur
. mengontrol sistem endokrrin
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Disebut sebagai pintu gerbang ke korteks serebral . Seluruh input sensorik melalui ini
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Medula spinalis
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UPPER MOTOR NEURONS
Upper Motor Neurons adalah proyeksi neuron di lapisan ke V korteks serebral yang melaksanakan pergerakan volunter melalui jaras piramidal dan ekstrapramidal
upper motor neurons terletak di motor cortex (M1 area or Brodmann’s area 4 and the Premotor cortex (M2 area or Brodmann’s area 6)
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JARAS UPPER MOTOR NEURON
Note: Some large Pyramidal Upper Motor Neurons in the Motor Cortex (Betz Cells) have direct connections with Lower Motor Neurons which control the intrinsic muscles of hand.
Upper Motor Neuron mengontrol Lower Motor Neuronsmelalui neurons dalam zone Intermediate
BetzCell
OtotExtrafusal
Otot Intrafusal
1) Gamma Motor Neuron
2) 1A Sensory Fiber3) Alpha Motor Neuron
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VASKULARISASI OTAK
Circulus Wilisi
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CIRCULUS WILLISI
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VENA-VENA OTAK
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