Superior and inferior orbital fissures

The video tutorial explores the neurovasculature of the orbit, focusing on the superior and inferior orbital fissures. It defines these structures, reviews the bones of the orbit, and details the neurovascular structures passing through each fissure. The optic canal is also discussed, along with clinical notes on traumatic superior orbital fissure syndrome. The tutorial concludes with a review of key points.

What is the primary function of the orbital fissures?

• To connect the nasal cavity to the mouth

• To protect the eyeball from external damage

• To allow passage of neurovascular structures

• To provide structural support to the skull

Which bones form the roof of the orbit?

• Ethmoid bone and lacrimal bone

• Frontal bone and sphenoid bone

• Zygomatic bone and maxilla

• Frontal bone and maxilla

Which nerve provides sensory innervation to the lacrimal gland?

• Lacrimal nerve

• Trochlear nerve

• Frontal nerve

• Abducens nerve

What is the function of the trochlear nerve?

• Controls the lateral rectus muscle

• Supplies blood to the orbit

• Provides sensory innervation to the forehead

• Innervates the superior oblique muscle

Which structure drains into the cavernous sinus?

• Infraorbital artery

• Zygomatic nerve

• Superior ophthalmic vein

• Inferior ophthalmic vein

What is the primary role of the infraorbital nerve?

• To provide motor innervation to the eye muscles

• To supply blood to the orbit

• To provide sensory innervation to the lower eyelids

• To drain blood from the orbit

Which artery travels with the optic nerve through the optic canal?

• Facial artery

• Maxillary artery

• Ophthalmic artery

• Infraorbital artery

What condition is associated with craniomaxillofacial trauma affecting the superior orbital fissure?

• Superior orbital fissure syndrome

• Optic neuritis

• Retinal detachment

• Glaucoma

Which nerve is responsible for the abduction of the eyeball?

• Optic nerve

• Abducens nerve

• Trochlear nerve

• Oculomotor nerve

What is the mnemonic used to remember the structures passing through the superior orbital fissure?

• SOFT

• OPTIC

• Zoy Cubed

• FINALISTS