Skull, dura & sinuses

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Lectures Of Anatomy by Dr, Noura El Tahawy . for Second Year Faculty of Medicine.

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Skull, dura & sinuses

  1. 1. Cranial Cavity By Dr. Noura El Tahawy
  2. 2. CRANIAL CAVITYDura Mater and Dural Folds:1. Falx cerebri Hypophysis Cerebri2. Falx cerebelli (pituitary gland)3. Tentorium cerebelli4. Diaphragma sellae Dural Venous Sinuses: Intracranial Part of 1. Single sinuses -Internal Carotid Artery 2. Paired sinuses -Middle Meningeal Artery Intra-cranial part of Cranial Nerves Emissary & Diploic Veins
  3. 3. Boney Cranial Cavity
  4. 4. Roof of the cranial cavity.
  5. 5. Anterior cranial fossa.
  6. 6. Middle cranial fossa.
  7. 7. Posterior cranial fossa.
  8. 8. Cranial nerves and foramen of exit from cranial cavity
  9. 9. Cranial nerves exiting the cranial cavity.
  10. 10. Cranial nerves and foramen of exit from cranial cavityI olfactory cribriform plate of ethmoidII optic optic foramenIII oculomotor superior orbital fissureIV trochlear superior orbital fissureV trigeminal:V1 ophthalmic division superior orbital fissureV2 maxillary division foramen rotundumV3 mandibular division foramen ovaleVI abducens superior orbital fissureVII facial internal auditory (or acoustic) meatusVIII vestibulocochlear internal auditory (or acoustic) meatusIX glossopharyngeal jugular foramenX vagus jugular foramenXI spinal accessory foramen magnum and jugular foramenXII hypoglossal hypoglossal foramen
  11. 11. 2- Optic 6- Abducent 4- Trochlear1- Olfactory 5- Trigeminal 3- Occulomotor 7- Facial 8- Vestibulcochlear 9- Glossopharyngeal 10- Vagus 12- Hypoglossal 11- Accessory
  12. 12. Dura& Dural Folds
  13. 13. Cranial cavity
  14. 14. Arrangement of the meninges and spaces.
  15. 15. Dural venous sinuses.
  16. 16. Parasagittal section of the head showing the disposition of the falx cerebri and tentorium cerebelli.
  17. 17. The cerebral dura materThe cerebral dura mater, its reflections and major venous sinuses
  18. 18. Part of cranial cavitysection of the head showing the disposition of the falx cerebri, together with some of the dural venous sinuses and subarachnoid cisterns.
  19. 19. Dural reflections and venous sinuses. The midbrain occupies the tentorial notch.
  20. 20. Tentorium cerebelliThe dura mater of the floor of the cranial cavity and the superior aspect of the tentorium cerebelli.Representation of the cavernous sinus and its venous relationships are greatly simplified and are shown on the left only. Note that the trochlear and abducens nerves have not been shown
  21. 21. Venous sinuses on the base of the skull. Thedura mater has been removed on the rightside. The inset indicateswhere groovesfor sinuses areseen on the dryskull. Note: On the left, the midbrain is seen at the level of thetentorial notch.On the right, a lower level section shows the trigeminalnerve attached to the pons.
  22. 22. Falx Cerebri Tentorium Cerebelli Falx Cerebelli
  23. 23. Trigeminal Ganglion Cavum Trigeminale Inner Meningeal Layer of the DuraOuter EndostealLayer of the Dura
  24. 24. Arterial Supply of Meninges Middle meningeal artery
  25. 25. Dural arterial supply.
  26. 26. Maxillary arteryLateral Pterygoid Muscle Superficial Temporal artery Middle meningeal artery External carotid artery
  27. 27. Lateral pterygoid muscleMiddle meningeal artery
  28. 28. Mandibular nerve and Otic ganglion Auriculotemporal nerve Middle meningeal artery
  29. 29. Middle Meningeal ArteryAuricultemporal Nerve
  30. 30. Branches ofMiddle Meningeal Artery
  31. 31. Pterygomeningeal branch Middle meningeal artery
  32. 32. Termination ofMiddle Meningeal Artery
  33. 33. Anterior terminal branch (Frontal branch) Anastomosing branch Posterior terminal branch (Parietal branch)
  34. 34. Middle meningeal artey
  35. 35. Side view of skull. The circle encloses the pterion.
  36. 36. Frontozygomatic Suture h i nc ch 2 2 in h nc 1 .5i h inc 1. 5 h Midpoint of the zygomatic arch i nc 1 inch 1Nasion Inion
  37. 37. Innervation of the dura mater
  38. 38. Dural innervation.
  39. 39. Veins, meninges, and dural venous sinuses.
  40. 40. The Diploic Veins
  41. 41. Dural venous sinuses
  42. 42. Dural venous sinusesSingle PairedSuperior sagittal S. Sphenoparietal S.Infreior sagittal S. Cavernous S.Straight S. Superior petrosal S.Intercavernous Ss. Inferior petrosal S.Basilar venous plexsus Transverse S.Occipital S. Sigmoid S.
  43. 43. Coronal SectionSubarachnoid Villi and Emissary Vein Granulations Endosteal Layer Meningeal Layer Venous Sinus Cerebral Vein Pia Arachnoid
  44. 44. Single Dural Venous Sinuses Superior Sagittal Sinus Inferior Sagittal Sinus Straight Sinus Intercavernous Sinuses Occipital Sinus Basilar Plexus of Sinuses
  45. 45. Paired Dural Venous Sinuses Sphenoparietal sinus Inferior petrosal sinus Cavernous sinus SigmoidSuperior petrosal sinus sinusTransverse sinus
  46. 46. Single Dural Venous Sinuses
  47. 47. Superior Sagittal Sinus 1- Superior Sagittal Sinus
  48. 48. Termination of Superior Sagittal Sinus
  49. 49. Straight sinus Right Transverse sinus LeftTransverse sinus Superior Sagittal Sinus
  50. 50. Structures that open into the Superior Sagittal Sinus
  51. 51. Superior Sagittal Sinus Vena Lacunae Lateralis 1- Vena Lacunae Lateralis
  52. 52. Subarachnoid Villi and Granulations 2- Arachnoid Villi and Granulations
  53. 53. Tributaries of the Superior Sagittal Sinus 1- Superior Cerebral Veins 2- Emissary Veins
  54. 54. Superior Sagittal Sinus Superior Cerebral Vein
  55. 55. Coronal SectionSubarachnoid Villi and Emissary Vein Granulations Endosteal Layer Meningeal Layer Venous Sinus Cerebral Vein Pia Arachnoid
  56. 56. Inferior Sagittal Sinus Straight Sinus Great Cerebral Vein2- Inferior Sagittal Sinus
  57. 57. Inferior Sagittal Sinus Straight Sinus Great Cerebral Vein3- The Straight Sinus
  58. 58. 4- The Occipital Sinus Occipital Dural Venous Sinus
  59. 59. 5- Intercavernous Sinuses Intercavernous Sinuses
  60. 60. Outer EndostealLayer of the Dura Inner Meningeal Layer of the Dura Pituitary Gland Diaphragma Sellae Intercavernous Dural Sinuses
  61. 61. 6- Basilar Plexus of Sinuses Basilar Plexus of Sinuses
  62. 62. II- Paired Sinuses
  63. 63. Sphenoparietal sinus Inferior petrosal sinus Cavernous sinus SigmoidSuperior petrosal sinus sinus Transverse sinus
  64. 64. Small dural veins Sphenoparietal sinus A tributary from The anterior division of The middle meningeal vein1- Spenoparietal Sinus
  65. 65. Cavernous sinus2- Cavernous Sinus
  66. 66. Cavernous SinusesOcculomotor NerveTrochlear NerveOphthalmic NerveMaxillary Nerve Internal carotid Artery Abducent Nerve with Sympathetic Plexus
  67. 67. 3- Superior Petrosal Superior Petrosal Sinus SinusInferior cerebral veins Veins fromTympanic cavity Superior cerebellar veins
  68. 68. 4- Inferior Petrosal Inferior Petrosal Sinus Sinus Basilar plexus of veins Labyrinthine veins Inferior cerebellar veins Pontine veins Medullary veins
  69. 69. 5- Transverse Sinus Posterior Temporal Diploic The superior petrosal Vein sinus in s ve ll ar be Cere Inferior cerebral The occipital sinus veins Occipital Diploic Vein The Transverse sinus
  70. 70. Sigmoid Sinus Communication with Suboccipital plexus of veins Occipital Sinus Communication with Occipital and / or Posterior auricular veins6- Sigmoid Sinus
  71. 71. Intracranial HemorrahgeExtradural hemorrahge Subarachnoid hemorrageArterial or venous Results from leakage or ruptureResults from injury to the of a congenital aneurysm on themeningeal arteries or veins circle of Willis or angioma Cerebral hemorrage Subdural hemorrahge Results from rupture of one ofVenous the intracerebral thin walledResults from injury to the arteries (lenticulostriate artery)superficial superior cerebralveins
  72. 72. Thank you

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