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Foramen Rotundum

The foramen rotundum is found in the middle cranial fossa, at the bottom of greater wing of the sphenoid bone, inferomedial towards the superior orbital fissure. Lateral wall of sphenoid sinus creates its medial border. It travels downwards as well as laterally in an oblique track and links the middle cranial fossa and pterygopalatine fossa.

Interactive Anatomical Interface

Highlight
nasal
Crista Galli
temporal bone
occipital bone
Internal auditory meatus
Stylomastoid Foramen
sphenoid bone
ethmoid bone
zygomatic bone
lacrimal bone
perpendicular plate
nasal cartilage
vomer
Nasal concha
Mandible
tectorial membrane of atlanto-axial joint
foramen magnum
tectorial membrane
Ethmoid sinuses
cribriform plate
Foramen rotundum
optic foramen
superior orbital fissure
palatine bone
Nuchal ligament
c1 atlas
c2 axis
c3 vertebrae
c4 vertebrae
c5 veretbrae
Posterior atlantoaxial ligament

Highlight
nasal
Crista Galli
temporal bone
occipital bone
Internal auditory meatus
Stylomastoid Foramen
sphenoid bone
ethmoid bone
zygomatic bone
lacrimal bone
perpendicular plate
nasal cartilage
vomer
Nasal concha
Mandible
foramen magnum

Highlight
tectorial membrane
tectorial membrane of atlanto-axial joint
Ethmoid sinuses
cribriform plate
Foramen rotundum
optic foramen
superior orbital fissure
palatine bone
Nuchal ligament
c1 atlas
c2 axis
c3 vertebrae
c4 vertebrae
c5 veretbrae
Posterior atlantoaxial ligament

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Related:   Innermost Intercostal Muscles

Development

Foramen Rotundum

Foramen Rotundum

The foramen rotundum advances in shape during the course of the fetal period and from birth till adolescence. After the 4th fetal month it acquires a perfect ring-shaped formation within the fetus. In the fetal period it is mostly oval-shaped and round-shaped after birth. After birth, the rotundum is around 2.5 mm and around 3 mm long in 15- 17 year olds. In adults the normal diameter of the foramen rotundum is 3.55 mm.

Function

Structures that travel through it are:

  • The maxillary branch of trigeminal nerve (V2)
  • Artery of foramen rotundum
  • Emissary veins.

Clinical Signification

Maxillary nerve block

Foramen Rotundum - Maxillary Nevre Block

Foramen Rotundum – Maxillary Nevre Block

By refining ostwalt’s method which has the highest degree of success in reaching to pterygopalatine fossa, a new method of maxillary block was created. In foramen rotundum, the block of the maxillary branch of the trigeminal nerve can be done without danger or difficulty.

 

 


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By | 2018-08-08T00:00:00+00:00 August 8th, 2018|Anatomy, Areas, Head and Neck|0 Comments