~BN05 CNS-Forebrain Anatomy.ppt
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~BN05 CNS-Forebrain Anatomy.ppt

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~BN05 CNS-Forebrain Anatomy.ppt ~BN05 CNS-Forebrain Anatomy.ppt Presentation Transcript

  • Anatomy of the Central Nervous System: Forebrain Lecture 5
  • Telencephalon - Cortex
    • Gray Matter
      • Somas and Dendrites
    • Neocortex - 6 layers
      • Sensory input ---> layer IV
      • Motor output ---> layer V
    • Paleocortex - 2 or 3 layers ~
  • Telencephalon - Fiber Systems
    • White Matter - myelinated axons
    • 3 types of fiber systems
      • Commissural
      • Association
      • Projection ~
    View slide
  • Commissural Fibers
    • Interconnect homologous structures in the two hemispheres
      • Corpus Callosum
      • Anterior and Posterior
      • Hippocampal ~
    View slide
  • Anterior Anterior
    • Association Fibers
      • interconnect cortical areas within each hemisphere
    • Projection Fibers
        • all other fiber systems
      • Fornix
      • Corticospinal tract
      • Mammillothalamic tract
    • Naming convention ~
    Association & Projection Fibers
  • Association Commissural Projection Hemispheres Left Right
  • The Limbic System
    • Emotion
    • Learning & Memory
    • Structures
      • Thalamus
      • Hypothalamus
      • Hippocampus
      • Cingulate gyrus
      • Amygdala
      • Fornix ~
  • Amygdala Hippocampus Limbic System Thalamus Hypothalamus Cingulate gyrus Fornix
  • Basal Ganglia
    • Extrapyramidal Motor System
      • Caudate
      • Putamen
      • Globus Pallidus
      • Claustrum
      • Amygdala
        • no motor function ~
    Striatum Lenticular Nucleus
  • Caudate Amygdala Putamen Globus pallidus
  • Claustrum
  • Diencephalon
    • Surrounds third ventricle
    • Thalamus
      • sensory and motor relay nuclei
    • Hypothalamus
      • motivation & emotion ~
  • Thalamus
    • Lateral Geniculate Nuclei - LGN
      • vision
    • Medial Geniculate Nuclei - MGN
      • audition
    • Ventroposterior Nuclei - VPL & VPM
      • somatosensation
    • Massa Intermedia - crosses midline ~
  • Hypothalamus
    • Control of behaviors critical to survival
      • Feeding
      • Fighting
      • Fleeing
      • Mating
    • Controls the pituitary gland ~
  • Thalamus
  • Diencephalon: thalamus LGN MGN Massa Intermedia
  • Diencephalon Hypothalamus Pituitary Stalk