33 Questions
Which part of the primary visual cortex represents the upper left quadrant of the visual field?
Lower right quadrant of the cortex
Where is the calcarine sulcus located in relation to the primary visual cortex?
Below the visual cortex
What causes lateral and vertical inversion in the projection of the visual field upon the visual cortex?
Normal representation of visual input
Which neurological condition might affect the projection of the visual field onto the primary visual cortex?
Optic neuritis
How many quadrants does the visual field project to in terms of the primary visual cortex?
4
Where are the cell bodies of both the 1st and 2nd order neurons of the central visual pathway located?
In the retina
Which type of neuron lies entirely within the retina?
1st order neuron
What is the role of horizontal cells in the retina?
Modulate transmission between photoreceptors and bipolar cells
Where do the axons of ganglion cells assemble before passing into the optic nerve?
Optic disc
What guarantees each hemisphere receives binocular input from the contralateral visual hemifield?
Optic chiasma
Where does visual perception occur in the brain?
Primary visual cortex
What happens to the axons derived from the nasal halves of the retinae at the optic chiasma?
They decussate and pass into the contralateral optic tract
Where do the 3rd order thalamocortical neurons project from the lateral geniculate nucleus?
Occipital lobe
Which structure lies immediately rostral to the optic chiasma?
Tuber cinerium
Where do relatively small number of fibres leave before reaching the lateral geniculate nucleus?
Pretectal area and superior colliculus
What is the primary function of the visual association cortex?
Interpreting visual images and recognition
Where do the axons that make up the optic nerve originate?
Ganglion cell layer of the retina
What is the total length of the intraorbital portion of the optic nerve?
25–30 cm
Which part of the brain does the optic nerve originate from?
Diencephalon
What is the function of the fibres that leave the optic nerve before reaching the lateral geniculate nucleus?
Mediate the pupillary light reflex
Where does vision commence?
Retina
Which part of the eye allows light to enter?
Cornea
Where do the fibers of the optic nerve project to?
Thalamus
Which region of the brain is responsible for visual perception?
Occipital lobe
What controls the muscle fibers of the iris?
Autonomic nervous system
Where are the cell bodies of the 1st and 2nd order neurons of the central visual pathway located?
In the retina
What is the function of horizontal cells in the retina?
Modulate transmission between photoreceptors and bipolar cells
Which cells are responsible for transferring information from photoreceptors to ganglion cells?
Bipolar cells
Where do the fibers of the optic nerve undergo hemidecussation?
In the optic chiasma
What guarantees binocular input from the contralateral visual hemifield to each hemisphere?
The optic chiasma
Which type of neuron lies entirely within the retina?
Bipolar cell
What is the primary function of ganglion cells in the visual pathway?
Transmit information to the brain through the optic nerve
What modulates transmission between bipolar cells and ganglion cells in the retina?
Horizontal cells
Explore how the visual field is projected onto the primary visual cortex with lateral and vertical inversions, leading to unique representations. Learn about the mapping of different quadrants of the visual field to specific regions in the brain.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
