CN II Optic Flashcards
What special sensory?
Visual perception
T/F
The CN II Optic nerve is the largest of the cranial nerves?
T
How are images projected on the retina?
Upside down
In reverse
What is the right visual field?
Projects to left primary visual cortex
What is the left visual field?
Projects to right primary visual cortex
What is the superior visual field?
Projects to the primary visual cortex on the lower bank of the calcarine fissure
What is the inferior visual field?
Projects to the primary visual cortex on the upper bank of the calcarine fissure
The optic nerve carries information from?
One eye to the optic chiasm
The optic chasim crosses the?
visual field information
The optic chasim axons from nasal hemiretina (medial side of retina closest to the nose) do what?
Decussate
-Lateral visual field information
The optic chasim axons from the temporal hemiretina (lateral side of retina closest to the temples) remain?
Ipsilateral
-Medial visual field information
The optic tract axons of neurons carrying contralateral visual field information from the?
Optic chaism to lateral geniculate nucleus of the thalamus
The optic tract visual information also travels to?
Superior colliculus and hypothalamus
What is the superior colliculus for?
coordination of head and eye movements, arousal and attention
What is the hypothalamus for?
To entrain the bodys clock
The optic radiations axons form the lateral geniculate nucleus of the thalamus to the?
primary visual cortex in the occipital lobe
What are the 2 optic radiations?
superior optic radiation
inferior optic radiation
The inferior optic radiation axons carrying information from the?
Superior visual fields travel in the inferior optic radiations through the temporal lobe
The inferior optic radiation prior to heading posteriorly to the primary visual cortex on the?
Lower/inferior bank of the calcarine fissure.
The superior optic radiation fibers carrying information form the?
Inferior visual fields travel in the superior optic radiations through the parietal lobe
The superior optic radiation after the parietal lobe sends information to the?
Primary visual cortex on the upper/superior bank of the calcarine fissure.
