Anterior Cranial Fossa Openings



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Anterior Cranial Fossa

Openings

Associated Bone

Structures Transmitted

Perforations in the Cribriform plate

Ethmoid Bone

  • Olfactory Nerves (1st Cranial Nerve)

Foramen Cecum




Middle Cranial Fossa

Openings

Associated Bone

Structures Transmitted

Optic Canal

Lesser Wing of the Sphenoid bone

  • Optic Nerve (2nd Cranial Nerve)

  • Opthalmic Artery

Superior Orbital Fissure

Between Greater and Lesser Wing of the Sphenoid bone

  • Nerves

    • Lacrimal

    • Frontal

    • Occulomotor (3rd Cranial Nerve)

    • Trochlear (4th Cranial Nerve)

    • Nasocilliary

    • Abducent (6th Cranial Nerve)

  • Superior Opthalmic Vein

Foramen Rotundum

Greater Wing of the Sphenoid bone



  • Maxillary Nerve (V2 of Trigeminal of 5th Cranial Nerve)

Foramen Ovale

  • Madibular Nerve (V3 of Trigeminal of 5th Cranial Nerve)

  • Lesser Petrosal Nerve

Foramen Spinosum

  • Middle Meningeal Artery

Foramen Lacerum

Between the Petrous part of Temporal bone to Sphenoid bone

  • Internal Carotid Artery

Posterior Cranial Fossa

Openings

Associated Bone

Structures Transmitted

Foramen Magnum

Occipital Bone

  • Medulla Oblongata

  • Spinal part of Accessory Nerve (11th Cranial Nerve)

  • Right and Left Vertebral Arteries

Hypoglossal Canal

  • Hypoglossal Nerve (12th Cranial Nerve)

Jugular Foramen

Between Petrous part of Temporal bone to Condylar part of Occipital bone

  • Nerves

    • Glossopharyngeal Nerve (9th Cranial Nerve)

    • Vagus Nerve (10th Cranial Nerve)

    • Accessory Nerve (11th Cranial Nerve)

  • Sigmoid Sinus

    • Becomes Internal Jugular Vein

Internal Acoustic Meatus

Petrous part of Temporal bone

  • Vestibulocochlea Nerve (8th Cranial Nerve)

  • Facial Nerve (7th Cranial Nerve)

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