Ns11 Limbic System

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    Ns11 Limbic System - Presentation Transcript

    1. Limbic System Dr. Skantha Kandiah MBA, MSc (NUI), MB BCh BAO (NUI), LRCP & SI Senior Lecturer in Anatomy and Lecturer in Healthcare Management RCSI
    2. Limbic System
      • Cingulate gyrus
      • Hippocampus
      • Fornix
      • Mamillary bodies
      • Septal nuclei
      • Amygdala
    3.  
    4.  
    5.  
    6.  
    7. FORNIX
      • CONNECTS MAMMILLARY BODIES TO HIPPOCAMPUS
      • Efferent fibres from hippocampus form fimbria
    8.  
      • NUCLEUS ACCUMBENS
        • Stimulation – sense of well-being
        • Connection to basal nuclei –
          • motor expression of emotion?
        • SEPTAL AREA – stimulation – sensation like orgasm
          • Destruction of septal area -- rage
    9. AMYGDALA
      • At tip of tail of caudate nucleus and anterior horn of lateral ventricle
      • Fear – important for survival
      • ? Overactivity – rage
      • ? Role in phobias
      • Bilateral ablation – timidity, hypersexuality.
    10.  
    11. HIPPOCAMPUS
      • IMPORTANT FOR MEMORY
      • 3 layers of cells (allocortex)
      • Alzheimer’s disease
        • General cortical degeneration
        • Hippocampal degeneration (bilateral) – cannot form new memories
        • Frontal degeneration – inappropriate behaviour, later -= attention and motivation deficit

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    NS11
    Lecture 11 of 63 in the Neuroscience Module

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