Visual Pathway and Retinal Fields

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What is the path of the visual neural pathway from the retina?

Cornea -> LGN -> retina

Iris -> retina -> optic nerve -> LGN

Lens -> retina -> optic nerve -> LGN

Retina -> optic nerve -> LGN -> visual cerebral cortex (correct)

What is the correct order of the visual pathway from the retina to the visual cortex?

Retina → Optic Tract → Optic Nerve → Optic Chiasm → Lateral Geniculate Nucleus → Optic Radiation → Visual Cortex

Retina → Optic Radiation → Optic Tract → Optic Nerve → Lateral Geniculate Nucleus → Optic Chiasm → Visual Cortex

Retina → Lateral Geniculate Nucleus → Optic Radiation → Optic Tract → Optic Nerve → Optic Chiasm → Visual Cortex

Retina → Optic Nerve → Optic Chiasm → Optic Tract → Lateral Geniculate Nucleus → Optic Radiation → Visual Cortex (correct)

What is the relationship between the visual field and retinal fields in the visual cortex?

The left visual field is represented in the left occipital lobe and the right visual field is represented in the right occipital lobe

The left visual field is represented in the right occipital lobe and the right visual field is represented in the left occipital lobe (correct)

The visual field is not represented in the cerebral cortex

The visual field is represented in the frontal lobe, not the occipital lobe

What is the relationship between visual fields and retinal fields?

Retinal fields are inverted and reversed in the visual fields Signup and view all the answers

Which area of the cerebral cortex is important for conscious processing of visual information?

Occipital lobe Signup and view all the answers

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 Signup and view all the answers

What type of lesion can cause blurred vision and loss of color vision, including achromatopsia?

Lesions before the optic chiasm Signup and view all the answers

What is the effect of a lesion in the visual pathway on visual field deficits?

Creation of visual field deficits Signup and view all the answers

What is the function of the aqueous humour in the eye?

It supports metabolism of internal eye structures Signup and view all the answers

What is the term for the crossing of ganglion cell axons from each nasal hemiretina at the optic chiasm?

Decussation Signup and view all the answers

What is the structure that carries the visual information from the eye to the brain?

Optic nerve Signup and view all the answers

What is the term for a local lesion in the retina that can cause a blind spot?

Scotoma Signup and view all the answers

What is the rate of visual information leaving each eye?

10 Mb/sec Signup and view all the answers

What type of RGCs are more detail sensitive and can detect gradients of color?

P(Parvocellular)-RGCs Signup and view all the answers

What is the area in the fundus of the eye where UV absorbing Xanthophyll molecules are enriched?

Macula lutea Signup and view all the answers

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 Signup and view all the answers

What is the diameter of the fovea centralis?

1 mm Signup and view all the answers

Where do axons from the nasal retina enter into the optic disc?

In a horizontal band along the optic disc Signup and view all the answers

Visual Pathway and Retinal Fields

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