18 Questions
What is the path of the visual neural pathway from the retina?
Retina -> optic nerve -> LGN -> visual cerebral cortex
What is the correct order of the visual pathway from the retina to the visual cortex?
Retina → Optic Nerve → Optic Chiasm → Optic Tract → Lateral Geniculate Nucleus → Optic Radiation → Visual Cortex
What is the relationship between the visual field and retinal fields in the visual cortex?
The left visual field is represented in the right occipital lobe and the right visual field is represented in the left occipital lobe
What is the relationship between visual fields and retinal fields?
Retinal fields are inverted and reversed in the visual fields
Which area of the cerebral cortex is important for conscious processing of visual information?
Occipital lobe
What is the role of the suprachiasmatic nucleus in the visual pathway?
It receives direct ganglion cell fibers and is involved in regulating the circadian rhythm
What type of lesion can cause blurred vision and loss of color vision, including achromatopsia?
Lesions before the optic chiasm
What is the effect of a lesion in the visual pathway on visual field deficits?
Creation of visual field deficits
What is the function of the aqueous humour in the eye?
It supports metabolism of internal eye structures
What is the term for the crossing of ganglion cell axons from each nasal hemiretina at the optic chiasm?
Decussation
What is the structure that carries the visual information from the eye to the brain?
Optic nerve
What is the term for a local lesion in the retina that can cause a blind spot?
Scotoma
What is the rate of visual information leaving each eye?
10 Mb/sec
What type of RGCs are more detail sensitive and can detect gradients of color?
P(Parvocellular)-RGCs
What is the area in the fundus of the eye where UV absorbing Xanthophyll molecules are enriched?
Macula lutea
Which type of lesions can cause retrograde “Wallerian” atrophy of RGCs in the optic nerve?
Lesions to the 2° neuron (RGC) axons within the brain
What is the diameter of the fovea centralis?
1 mm
Where do axons from the nasal retina enter into the optic disc?
In a horizontal band along the optic disc
Test your knowledge of the visual pathway, including the retino-geniculo-calcarine pathway, photoreceptors, bipolar cells, and the visual cortex. Learn about retinal fields, scotoma, and lesions affecting the visual pathway.
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