Visual pathways Flashcards
Visual perception pathways take information from the retina to the _
Visual perception pathways take information from the retina to the cortex
Circadian rhythm visual pathways take information from the retina to the _
Circadian rhythm visual pathways take information from the retina to the diencephalon
Visual reflex visual pathways take information from the retina to the _
Visual reflex visual pathways take information from the retina to the brainstem
* Control head/eye movement and pupil size
The retina [orientation] incoming visual information
The retina inverts incoming visual information
* The retina processes visual information upside down and reversed
The right visual field maps to the [brain hemisphere]
The right visual field maps to the left hemisphere
* Each hemisphere of the cortex deals with the contralateral visual field
* Retinotopic organization throughout the pathway
Visual pathways synapse in the _ , specifically in the [nucleus]
Visual pathways synapse in the thalamus, specifically in the lateral geniculate nucleus (LGN)
When light hits the back of the retina it gets absorbed and transduced into neural impulses by _
When light hits the back of the retina it gets absorbed and transduced into neural impulses by photoreceptors
The optic nerve (CN II) is formed by axons of [cells]
The optic nerve (CN II) is formed by axons of retinal ganglion cells
Name the structures along the visual pathway from the retina –> visual cortex
Retina –>
Optic nerve –>
Optic chiasm –>
Optic tract –>
Lateral geniculate body –>
Optic radiations –>
Visual cortex
The calcarine sulcus separates two gyri of the primary visual cortex in the occipital lobe, _ and _
The calcarine sulcus separates two gyri of the primary visual cortex in the occipital lobe, cuneus and lingual
The right visual field is processed by the _ and _ retinas
The right visual field is processed by the right nasal retina and left temporal retina
The left visual field is processed by the _ and _ retinas
The left visual field is processed by the left nasal retina and right temporal retina
The upper visual field is processed in [occipital lobe region]
The upper visual field is processed in lingual gyrus
The lower visual field is processed in [occipital lobe region]
The lower visual field is processed in cuneus gyrus
The meyers loop carries information from the (upper/lower) visual field to the [gyrus]
The meyers loop carries information from the upper visual field to the lingual gyrus
[Region] receives crude visual information; whereas [region] integrates the visual information for a more complete picture (ie object, pattern, memory, other senses, etc)
Primary visual cortex receives crude visual information; whereas visual association area integrates the visual information for a more complete picture (ie object, pattern, memory, other senses, etc)
Damage to [brain regions] can cause visual agnosia; inability to recognize and name objects despite normal vision
Damage to visual association areas can cause visual agnosia; inability to recognize and name objects despite normal vision
Retinotopic mapping means that the region of greatest visual acuity, ie the fovea, has _
Retinotopic mapping means that the region of greatest visual acuity, ie the fovea, has greater cortical surface area
Information from (nasal/temporal) retinas crosses over contralaterally
Information from nasal retinas crosses over contralaterally
Damage to the optic nerve before the optic chaism will cause [deficit]
Damage to the optic nerve before the optic chaism will cause ipsilateral eye deficit
Damage to the optic chiasm at the midline will cause [deficit]
Damage to the optic chiasm at the midline will cause bitemporal hemianopia
* Peripheral vision loss in both eyes (tunnel vision)
Pituitary tumors tend to cause [vision loss]
Pituitary tumors tend to cause bitemporal hemianopia
* Due to compression at the optic chiasm
Damage at the optic tract or beyond will affect (contralateral/ipsilateral) eye
Damage at the optic tract or beyond will affect contralateral visual field
Damage to the primary visual cortex will cause [deficit]
Damage to the primary visual cortex will cause contralateral vision field deficit with macular sparing
Left homonymous hemianopia is often caused by lesion at [location]
Left homonymous hemianopia is often caused by lesion at right optic tract before the thalamus
Damage at the right meyer loop will cause [deficit]
Damage at the right meyer loop will cause left homonymous superior quadrantanopia
Damage at the right dorsal optic radiation will cause [deficit]
Damage at the right dorsal optic radiation will cause left homonymous inferior quadrantanopia
Lesion at the left macula would cause [deficit]
Lesion at the left macula would cause left central scotoma
