Bickerstaff's encephalitis is a rare inflammatory disorder of the central nervous system, first described by Edwin Bickerstaff in 1951. It may also affect the peripheral nervous system, and has features in common with both Miller Fisher syndrome and GuillainâBarrÃ© syndrome. 1  1 Signs and symptoms.  2 Pathophysiology.
Pathophysiology. Tears are produced in the lacrimal gland and drain through the upper and lower puncta into the canaliculi and then into the lacrimal sac and nasolacrimal duct (see Figure: Anatomy of the lacrimal system. ). Obstruction of tear drainage can lead to stasis and infection.
1. Lacrimal gland- Continuously producing lac fluid, superior and lateral to eye 2. Lacrimal caruncle- medial portion 3. Lacrimal punta(2)- helps drain tears, holes in the caruncle 4. Lacrimal canaliculus- helps drain from puncta to.. 5. Lacrimal sac- drains to.. 6. Nasolacrimal duct- receives tears from sac and drains fluid into nasal cavity What are the extrinsic eye muscles? Muscles that move the eye and originate in the posterior orbit attaching onto the anterior sclera of the eye