Anatomy of the Central Nervous System: Forebrain  Lecture 5
Telencephalon - Cortex <ul><li>Gray Matter  </li></ul><ul><ul><li>Somas and Dendrites </li></ul></ul><ul><li>Neocortex - 6...
Telencephalon - Fiber Systems <ul><li>White Matter - myelinated axons </li></ul><ul><li>3 types of fiber systems </li></ul...
Commissural Fibers  <ul><li>Interconnect homologous structures in the two hemispheres </li></ul><ul><ul><li>Corpus Callosu...
Anterior Anterior
<ul><li>Association Fibers </li></ul><ul><ul><li>interconnect cortical areas within each hemisphere </li></ul></ul><ul><li...
Association  Commissural Projection Hemispheres Left  Right
The Limbic System <ul><li>Emotion </li></ul><ul><li>Learning & Memory  </li></ul><ul><li>Structures </li></ul><ul><ul><li>...
Amygdala Hippocampus Limbic System Thalamus Hypothalamus Cingulate gyrus Fornix
Basal Ganglia <ul><li>Extrapyramidal Motor System </li></ul><ul><ul><li>Caudate  </li></ul></ul><ul><ul><li>Putamen </li><...
Caudate Amygdala Putamen Globus pallidus
Claustrum
Diencephalon <ul><li>Surrounds third ventricle </li></ul><ul><li>Thalamus  </li></ul><ul><ul><li>sensory and motor relay n...
Thalamus <ul><li>Lateral Geniculate Nuclei - LGN  </li></ul><ul><ul><li>vision </li></ul></ul><ul><li>Medial Geniculate Nu...
Hypothalamus <ul><li>Control of behaviors critical to survival </li></ul><ul><ul><li>Feeding </li></ul></ul><ul><ul><li>Fi...
Thalamus
Diencephalon:  thalamus LGN MGN Massa Intermedia
Diencephalon Hypothalamus Pituitary Stalk
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~BN05 CNS-Forebrain Anatomy.ppt

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~BN05 CNS-Forebrain Anatomy.ppt

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