2 divisions of the nervous system pns – peripheral nervous system cns – central nervous system...
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brain 3 main divisions of brain – hindbrain; midbrain; forebrainTRANSCRIPT
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2 divisions of the nervous system
• PNS – Peripheral Nervous System
• CNS – Central Nervous System– brain, spinal cord
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brain
• 3 main divisions of brain
– hindbrain; midbrain; forebrain
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hindbrain
• a number of important fiber tracts project through the hindbrain into higher brain regions
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hindbrain
• a number of important fiber tracts project through the hindbrain into higher brain regions– medulla
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hindbrain
• a number of important fiber tracts project through the hindbrain into higher brain regions– Medulla
• Reticular formation – NE; locus coerulus - 5-HT (serotonin); raphe nuclei
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medulla
hindbrain
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hindbrain
• a number of important fiber tracts project through the hindbrain into higher brain regions– medulla
– Pons• -raphe -
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hindbrain
• a number of important fiber tracts project through the hindbrain into higher brain regions– medulla
– pons
– cerebellum
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medulla
hindbrain
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midbrain
• Sensory information
• Reward– Ventral tegmental area
• movement
– substantia nigra -
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forebrain
• cerebral cortex
• subcortical structures
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forebrain
• Cerebral cortex
– role of convolutions
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4 lobes of cerebral cortex
• frontal
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frontal
parietal
temporal occipital
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4 lobes of cerebral cortex
• frontal
• parietal
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frontal
parietal
temporal occipital
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4 lobes of cerebral cortex
• frontal
• parietal
• temporal
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frontal
parietal
temporal occipital
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4 lobes of cerebral cortex
• frontal
• parietal
• temporal
• occipital
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frontal
parietal
temporal occipital
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Some subcortical structures
• thalamus
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The thalamus communicates with much of the cerebral cortex - serving as a sensory and motor information relay.
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Some subcortical structures
• thalamus • hypothalamus
– important for hormonal release– also major DA projections
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Some subcortical structures
• thalamus • hypothalamus• limbic system
– important for emotion; learning and memory; reward; major DA pathway
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Some subcortical structures
• thalamus • hypothalamus• limbic system• basal ganglia
– important for movement; major DA pathway that originates at substantia nigra terminates here
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30http://brainmind.com/BrainMaps5.html
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Major DA pathways
• mesolimbic – reward, emotion, etc• nigrostriatal – important for movement;
Parkinsons Disease – degeneration of the DA neurons in this pathway
• tuberofundibular - hypothalamus
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NE – arousal, depression, also the NT in part of the sympathetic NS
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5HT – imp in sleep, depression, aggression (maybe)
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basal forebrain, hippocampal, midbrain nuclei
PNS – neuromuscular junction, sympathetic ns, parasympathetic ns