CRANIAL FOSSAE AND
ITS RELATED STRUCTURES

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INDIAN DENTAL ACADEMY
Leader in continuing dental education
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ARCHITECTURE OF THE CRANIUM
ARRANGEMENT OF THE
CRANIAL FOSSA
CORRELETION

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3 Phases
ARCHITECTURE OF
CRANIUM

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CA

VA
L

IA
R

?

AL ON ?
CI T
FA LE
KE
S

CR
AN
IU
M
SK
UL

L

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?

?
SKULL

FACIAL SKELETON
CALVARIA
CRANIUM

MANDIBLE + CRANIUM = SKULL
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NUMBER OF BONES . . .
8 BONES FORMS CALVARIA
14 BONES FORMS FACIAL SKELETON

22
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PAIRED
PARIETAL
TEMPORAL
UNPAIRED
FRONTAL
OCCIPITAL
SPHENOID
ETHMOID
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PAIRED
MAXILLA
ZYGOMATIC
NASAL
LACRIMAL
PALATINE
INFERIOR NASAL
CONCHA

UNPAIRED
MANDIBLE
NORMA FRONTALIS

VOMER
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Unions . . .
Sagittal suture
Coronal suture
Lambdoid suture
Temporal suture

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ARRANGEMENT OF
CRANIAL FOSSA

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AN
TE
R

ID
M

IO
R

LE
D

PO

ST
ER

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IO

R
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BONES . . .
Frontal bone in front
Orbital part of frontal bone
Cribriform plate of ethmoid
Lesser wing of sphenoid
Anterio...
DESCRIPTION . . .

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FORAMEN . . .

FORAMEN CAECUM
vein from upper part
of nose to Superior
sagittal sinus

FORAMINA OF CRIBRIFORM
PLATE OF ETH...
RELATED STRUCTURES . . .
Falx cerebri – crista galli
Tentorium cerebelli – anterior clinoid process
Frontal lobe of brain
...
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BONES . . .
Lesser wing spnenoid bone
Greater wing of sphenoid bone
Anterior clinoid process
Petrous part of temporal
bone...
DESCRIPTION . . .

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FORAMEN . . .
Superior orbital fissure
Lateral part
Lacrimal nerve
Frontal
Trochler n.
Sup ophthalmic vein
Meningeal br. O...
Superior orbital fissure
Middle part
Upper & lower divisions of oculomotor n.
Nasociliary n.
Abducent n.

Medial part
Infe...
FORAMEN . . .
Foramen rotundum
Transmits maxillary nerve

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Foramen ovale

mandibular nerve
lesser petrosal nerve
acc.meningeal artery
emissary vein connecting cavernous sinus with
p...
Foramen spinosum
Middle meningeal artery
Meningeal branch of mandibular nerve
Post. Trunk of middle meningeal vein

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Emissary sphenoidal foramen
emissary vein conn. Cavernous sinus
with the pterygoid plexus of veins

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Foramen lacerum
Lower part
Meningeal branch of ascending pharyngeal
artery
Emissary vein from cavernous sinus

Upper part
...
RELATED STRUCTURES . . .
Temporal lobes of the cerebral hemispheres
Diaphragma sellae attached to
tuberculum sellae

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RELATED STRUCTURES . . .
Hypophysis cerebri on hypophyseal fossa
Anterior end of tentorium cerebelli & petro
sphenoidal li...
RELATED STRUCTURES . . .
Cavernous sinus
Superior petrosal sinus

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BONES . . .
Petrous temporal bone
Dorsum sellae of sphenoid bone
Squamous part of occipital bone
Mastoid part of temporal
...
DESCRIPTION . . .

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FORAMEN . . .

JUGULAR FORAMEN
ANTERIOR PART

Inferior petrosal sinus
Meningeal branch of ascending
pharyngeal artery

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JUGULAR FORAMEN
MIDDLE PART
9th , 10th & 11th cranial nerves

POSTERIOR PART
Internal jugular vein
Meningeal branch of occ...
FORAMEN MAGNUM
ANTERIOR PART
Apical ligament of dens
Membrana tectoria

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FORAMEN MAGNUM
SUBARACHNOID SPACE
Spinal accessory nerve
Vertebral arteries
Sympathetic plexus around vertebral
arteries
P...
FORAMEN . . .

FORAMEN MAGNUM
POSTERIOR PART
Lower part of medulla
Tonsils of cerebellum
Meninges

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HYPOGLOSSAL CANAL
Hypoglossal nerve
Meningeal branch of ascending
pharyngeal artery
Emissary vein connecting sigmoid sinus...
POSTERIOR CONDYLAR CANAL
Emissary vein connecting sigmoid sinus
to suboccipital venous plexus

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RELATED STRUCTURES . . .
Apical ligament of dens
Membrana tectori
Flocculus of cerebellum
Falx cerebri
Pons & medulla
Cere...
BRAIN & THE FOSSSA

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Leader in continuing dental education

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Cranial fossa /certified fixed orthodontic courses by Indian dental academy

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Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

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Cranial fossa /certified fixed orthodontic courses by Indian dental academy

  1. 1. CRANIAL FOSSAE AND ITS RELATED STRUCTURES www.indiandentalacademy.com
  2. 2. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  3. 3. ARCHITECTURE OF THE CRANIUM ARRANGEMENT OF THE CRANIAL FOSSA CORRELETION www.indiandentalacademy.com 3 Phases
  4. 4. ARCHITECTURE OF CRANIUM www.indiandentalacademy.com
  5. 5. CA VA L IA R ? AL ON ? CI T FA LE KE S CR AN IU M SK UL L www.indiandentalacademy.com ? ?
  6. 6. SKULL FACIAL SKELETON CALVARIA CRANIUM MANDIBLE + CRANIUM = SKULL www.indiandentalacademy.com
  7. 7. NUMBER OF BONES . . . 8 BONES FORMS CALVARIA 14 BONES FORMS FACIAL SKELETON 22 www.indiandentalacademy.com
  8. 8. PAIRED PARIETAL TEMPORAL UNPAIRED FRONTAL OCCIPITAL SPHENOID ETHMOID www.indiandentalacademy.com
  9. 9. PAIRED MAXILLA ZYGOMATIC NASAL LACRIMAL PALATINE INFERIOR NASAL CONCHA UNPAIRED MANDIBLE NORMA FRONTALIS VOMER www.indiandentalacademy.com
  10. 10. Unions . . . Sagittal suture Coronal suture Lambdoid suture Temporal suture www.indiandentalacademy.com
  11. 11. ARRANGEMENT OF CRANIAL FOSSA www.indiandentalacademy.com
  12. 12. AN TE R ID M IO R LE D PO ST ER www.indiandentalacademy.com IO R
  13. 13. www.indiandentalacademy.com
  14. 14. www.indiandentalacademy.com
  15. 15. BONES . . . Frontal bone in front Orbital part of frontal bone Cribriform plate of ethmoid Lesser wing of sphenoid Anterior part of body of sphenoid www.indiandentalacademy.com
  16. 16. DESCRIPTION . . . www.indiandentalacademy.com
  17. 17. FORAMEN . . . FORAMEN CAECUM vein from upper part of nose to Superior sagittal sinus FORAMINA OF CRIBRIFORM PLATE OF ETHMOID miniature olfactory nerves from nasal mucosa to olfactory bulb www.indiandentalacademy.com
  18. 18. RELATED STRUCTURES . . . Falx cerebri – crista galli Tentorium cerebelli – anterior clinoid process Frontal lobe of brain www.indiandentalacademy.com
  19. 19. www.indiandentalacademy.com
  20. 20. BONES . . . Lesser wing spnenoid bone Greater wing of sphenoid bone Anterior clinoid process Petrous part of temporal bone Squamous temporal bone Anteroinferior angle of parietal bone Body of sphenoid bone www.indiandentalacademy.com
  21. 21. DESCRIPTION . . . www.indiandentalacademy.com
  22. 22. FORAMEN . . . Superior orbital fissure Lateral part Lacrimal nerve Frontal Trochler n. Sup ophthalmic vein Meningeal br. Of lacrimal artery Anastomotic branch of middle meningeal art. www.indiandentalacademy.com
  23. 23. Superior orbital fissure Middle part Upper & lower divisions of oculomotor n. Nasociliary n. Abducent n. Medial part Inferior ophthalmic vein Symp. Nerves from the plexus around the internal carotid artery www.indiandentalacademy.com
  24. 24. FORAMEN . . . Foramen rotundum Transmits maxillary nerve www.indiandentalacademy.com
  25. 25. Foramen ovale mandibular nerve lesser petrosal nerve acc.meningeal artery emissary vein connecting cavernous sinus with pterygoid plexus of veins ant. Trunk of middle meningeal vein www.indiandentalacademy.com
  26. 26. Foramen spinosum Middle meningeal artery Meningeal branch of mandibular nerve Post. Trunk of middle meningeal vein www.indiandentalacademy.com
  27. 27. Emissary sphenoidal foramen emissary vein conn. Cavernous sinus with the pterygoid plexus of veins www.indiandentalacademy.com
  28. 28. Foramen lacerum Lower part Meningeal branch of ascending pharyngeal artery Emissary vein from cavernous sinus Upper part internal carotid artery nerve of pterygoid canal www.indiandentalacademy.com
  29. 29. RELATED STRUCTURES . . . Temporal lobes of the cerebral hemispheres Diaphragma sellae attached to tuberculum sellae www.indiandentalacademy.com
  30. 30. RELATED STRUCTURES . . . Hypophysis cerebri on hypophyseal fossa Anterior end of tentorium cerebelli & petro sphenoidal ligament to post. clinoid process www.indiandentalacademy.com
  31. 31. RELATED STRUCTURES . . . Cavernous sinus Superior petrosal sinus www.indiandentalacademy.com
  32. 32. www.indiandentalacademy.com
  33. 33. BONES . . . Petrous temporal bone Dorsum sellae of sphenoid bone Squamous part of occipital bone Mastoid part of temporal bone Mastoid angle of parietal bone www.indiandentalacademy.com
  34. 34. DESCRIPTION . . . www.indiandentalacademy.com
  35. 35. FORAMEN . . . JUGULAR FORAMEN ANTERIOR PART Inferior petrosal sinus Meningeal branch of ascending pharyngeal artery www.indiandentalacademy.com
  36. 36. JUGULAR FORAMEN MIDDLE PART 9th , 10th & 11th cranial nerves POSTERIOR PART Internal jugular vein Meningeal branch of occipital artery www.indiandentalacademy.com
  37. 37. FORAMEN MAGNUM ANTERIOR PART Apical ligament of dens Membrana tectoria www.indiandentalacademy.com
  38. 38. FORAMEN MAGNUM SUBARACHNOID SPACE Spinal accessory nerve Vertebral arteries Sympathetic plexus around vertebral arteries Posterior spinal arteries Anterior spinal artery www.indiandentalacademy.com
  39. 39. FORAMEN . . . FORAMEN MAGNUM POSTERIOR PART Lower part of medulla Tonsils of cerebellum Meninges www.indiandentalacademy.com
  40. 40. HYPOGLOSSAL CANAL Hypoglossal nerve Meningeal branch of ascending pharyngeal artery Emissary vein connecting sigmoid sinus to internal jugular vein www.indiandentalacademy.com
  41. 41. POSTERIOR CONDYLAR CANAL Emissary vein connecting sigmoid sinus to suboccipital venous plexus www.indiandentalacademy.com
  42. 42. RELATED STRUCTURES . . . Apical ligament of dens Membrana tectori Flocculus of cerebellum Falx cerebri Pons & medulla Cerebellum of brain www.indiandentalacademy.com
  43. 43. BRAIN & THE FOSSSA www.indiandentalacademy.com
  44. 44. www.indiandentalacademy.com
  45. 45. www.indiandentalacademy.com
  46. 46. www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com

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