Head neck i introskull

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Head neck i introskull

  1. 1. HEAD/NECK I: Introduction—The Skull <ul><li>Head function brainstorm </li></ul><ul><li>Sensory/Motor Targets </li></ul><ul><li>Overview: Head/Neck I-IV </li></ul><ul><li>The two-oval skull </li></ul><ul><li>Major features of the skull </li></ul><ul><li>The base of the skull </li></ul><ul><ul><li>The developmental view </li></ul></ul><ul><ul><li>The holes-out view </li></ul></ul>
  2. 2. What all does the head do? [brainstorm]
  3. 3. Nerve “targets” in head <ul><li>SENSORY </li></ul><ul><li>Special General </li></ul><ul><li>MOTOR </li></ul><ul><li>Muscles Glands </li></ul>
  4. 4. Overview Head/Neck I-IV <ul><li>Head I: Skull—a framework to hang on </li></ul><ul><ul><li>Overall organization of skull </li></ul></ul><ul><ul><li>Base of the skull—the hard part </li></ul></ul><ul><ul><ul><li>Developmental view </li></ul></ul></ul><ul><ul><ul><li>Cranial nerves out (to “targets”) </li></ul></ul></ul><ul><li>Head II: Throat targets </li></ul><ul><li>Head III: Special Sense targets </li></ul><ul><li>Head IV: Cranial nerves in depth </li></ul>
  5. 5. Overall skull organization Cerebral Hemisphere Cerebellum <ul><li>Neurocranium </li></ul><ul><li>Base of skull </li></ul><ul><li>Middle ear </li></ul><ul><li>Jaw </li></ul><ul><li>Throat </li></ul>
  6. 6. Major features of the skull <ul><li>Mastoid process </li></ul><ul><li>Styloid process </li></ul><ul><li>External auditory/ </li></ul><ul><li>acoustic meatus </li></ul><ul><li>(ear opening) </li></ul><ul><li>Ear drum </li></ul><ul><li>Hyoid bone </li></ul><ul><li>Epiglottis </li></ul><ul><li>Thryroid cartilage </li></ul><ul><li>Cricoid cartilage </li></ul><ul><li>Tracheal rings </li></ul>
  7. 7. M&M, Fig. 7.3
  8. 8. Major features of the skull <ul><li>Zygomatic arch </li></ul><ul><li>Ethmoid </li></ul><ul><li>Orbit </li></ul><ul><li>Nasal aperture </li></ul><ul><li>(choanae inside) </li></ul>
  9. 9. M&M, Fig. 7.2
  10. 10. Base of the skull—a developmental view <ul><li>Dermal bones in neurocranium </li></ul><ul><li>Chondral bone </li></ul><ul><li>at base of skull </li></ul><ul><ul><li>Olfactory capsule </li></ul></ul><ul><ul><li>(part of ethmoid) </li></ul></ul><ul><ul><li>Optic capsule </li></ul></ul><ul><ul><li>(part of sphenoid) </li></ul></ul><ul><ul><li>Otic capsule </li></ul></ul><ul><ul><li>(part of temporal </li></ul></ul><ul><ul><li>Occipital bone </li></ul></ul><ul><ul><li>(from somites </li></ul></ul><ul><ul><li>like C-verts) </li></ul></ul>
  11. 11. Base of the skull—cranial nerves out <ul><li>Ethmoid (olfactory) </li></ul><ul><li>I. Olfactory </li></ul><ul><li>Sphenoid (optic) </li></ul><ul><li>II. Optic </li></ul><ul><li>III. Oculomotor </li></ul><ul><li>IV. Trochlear </li></ul><ul><li>VI. Abducens </li></ul><ul><li>Temporal (otic) </li></ul><ul><li>VIII. Acoustic/Auditory/ </li></ul><ul><li>Vestibulocochlear </li></ul><ul><li>Face/Jaws </li></ul><ul><li>V. Trigeminal </li></ul><ul><li>VII. Facial </li></ul><ul><li>Throat (rest of body) </li></ul><ul><li>IX Glossopharyngeal </li></ul><ul><li>X. Vagus </li></ul><ul><li>XI. Spinal Accessory </li></ul><ul><li>XII. Hypoglosal </li></ul>
  12. 13. What’s ahead? <ul><li>Throat (pharynx) targets: Head/Neck II </li></ul><ul><li>Special Sensory targets: Head/Neck III </li></ul><ul><li>Back to cranial nerves: Head/Neck IV </li></ul>

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