CN2 Flashcards
Nerves from what part of the eye decussate and cross in the optic chiasm
Medial or nasal portion
What part of CN 2 curves around the inferior horn of the lateral ventricle
Meyer’s loop
What is responsible for simple on consensual light reflexes
Fibers from pretectal region
What is responsible for musculoskeletal reflexes after optic stimulation
Superior colliculi
What is responsible for visual perception
Lateral geniculate body
The superior colliculi communicates with what in order to control involuntary reflexes
Cranial and spinal nuclei
What tract does the superior colliculi use to send signals to the pons
Corticopontine tract
What does CN 2 communicate with the pons
For postural reflexes
What involves the optic nerve or tract, and the most common cause is Multiple Sclerosis
Retrobulbar neuritis
What is involved in optic or bulbar neuritis
Various forms of neuritis
What is Optic Atrophy associated with
Decreased visual acuity and a change in the color of the optic disc to light pink, white or grey
Does primary optic atrophy involve papilledema
No
What type of optic atrophy is associated with papilledema
Secondary optic atrophy
What can cause Primary optic atrophy
Tabes dorsalis
MS
(things that effect the nerve directly)
What can cause Secondary optic atrophy
Neuritis
Glaucoma
Increased cranial pressure (papilledema)
What disease is characterized by a tumor of the frontal lobe that causes ipsilateeral blindness, Anosmia and contralateral papilledema
Foster Kennedy Syndrome
What disease is associated with Mental deficiency, blindness, optic atrophy, dark cherry colour macula lutea and occurs in Jewish families
Tay-Sachs disease (Amaurotic Familial idicoy)
What condition is associated with a loss of indirect and direct light and has been found to occur as a diabetic complication
Argyll robertson pupil
What condition is characterized by a tonic pupillary (myotonic) reaction and the absence of one or more tendon reflexes
Holmes-Adie Syndrome
What is the term for bilateral deviation of the eye
Heterotropia
What is the term used to describe Outward/lateral deviation of the eye
Exotropia
What is the term used to describe inward/medial movement of the eye
Esotropia
What term is used to describe upward deviation of the eye
Hypertorpia
What term is used to describe downward deviation of the eye
Hypotropia
