CranialMotor_DentalS..

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CranialMotor_DentalS..

  1. 1. the corticobulbar system
  2. 2. Resources • Neuroanatomy: Text and Atlas; Chapter 11 Introduction (Handout) • http://www.columbia.edu/itc/hs/medical/histol – Year 1: Neuroanatomy Atlas – Descending motor pathways--selected images (compare with powerpoint handout)
  3. 3. Corticobulbar system • Cortical motor systems: – Corticospinal – Corticobulbar • Primarily bilateral control: – Jaw – Larynx, pharynx – Tongue – Upper facial muscles • Contralateral control: – Lower facial muscles
  4. 4. Cortical motor areas Basal ganglia Cerebellum Descending brain stem paths Descending cortical motor paths Spinal cord: Intermediate zone Ventral horn Muscle
  5. 5. Cortical motor areas Descending cortical motor paths From motor cortex To muscle
  6. 6. Upper facial muscles Cingulate motor area 1° motor cortex Lower facial muscles Upper facial muscles Upper facial muscles 1. Bilateral control of upper facial muscles 2. Redundant control of upper facial muscles
  7. 7. Cortical motor areas-lateral view
  8. 8. Cortical motor areas-medial view
  9. 9. Animation
  10. 10. Animation
  11. 11. Animation
  12. 12. Animation

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