Inferior orbital fissure
The inferior orbital fissure is an approximately 30 mm long and up to 5 mm wide bony gap between the large wing of the sphenoid bone and the floor of the eye socket in the human skull . It opens the eye socket towards the palatal fossa ( fossa pterygopalatina ) and the temporal fossa . The following structures run through the inferior orbital fissure:
- Infraorbital nerve (branch of the maxillary nerve )
- Zygomatic nerve (branch of the maxillary nerve )
- Infraorbital artery (branch of the maxillary artery )
- parasympathetic fibers from the pterygopalatine ganglion
- Inferior ophthalmic vein
The inferior orbital fissure is covered like a mesh by the smooth muscles of the orbitalis muscle . This can compress the orbital contents during contraction or give way if it is pushed backwards during contraction of the eyelid and eye muscles and the intraorbital pressure increases.
- Herbert Kaufmann: Strabismus. With the collaboration of W. de Decker et al. Enke, Stuttgart 1986, ISBN 3-432-95391-7 .