Revision - 5 Flashcards
The lateral geniculate nucleus deals with:
Vision
At dusk, colours lose their hue in what order?
Red disappears before green
A wavelength of 450 nanometers is our representation of:
Blue
The optic nerve head produces a …
Blind spot
The right visual field is composed of the …
Nasal portion of the right eye and the temporal portion of the left eye
Rods are to cones as:
Black and white is to colour
The dorsal stream projects to the …
Parietal lobe
Cells in the blobs found in the visual cortex are involved in …
Colour perception
This sequence is correct:
1) Cones
2) Bipolar
3) Ganglion
4) Lateral geniculate
5) Simple cortical cells
Luminance contrast (as in an edge) begins at the ...
Ganglion cell level
Orientation detection is first coded by …
Simple cortical cells
A patient described as having prosopagnosia could not …
Recognise faces
If you shortened the wavelength of light, you would change its …
Colour
Which of the following is true regarding electromagnetic energy?
Electromagnetic energy travels very quickly, so there is no delay between an event and an organism’s ability to see the event
The range of electromagnetic energy visible to
humans falls between …
400 and 750 nm
Most of the light that reaches your eye has been ___ by objects in the
environment
Reflected
Light entering the eye first passes through the …
Cornea
Our ability to read a book up close, then quickly focus at a faraway object is mediated by the …
Lens
In humans, the fovea is specialised for detailed vision and contains …
Cones only
What is not a type of cell found in the retina?
Unipolar cell
Match the term with its correct function:
Rods/scotopic vision
Your ability to read depends on having excellent acuity; therefore, reading is mediated by …
Photopic vision
Transduction in the eye is the process of translating a ___ stimulus into a
___ stimulus
Phsyical
Electrical
Photoreceptors are ___ in the dark
and produce ___ to signal changes in
light
Depolarized
Graded potentials
The three different classes of cones are …
Blue, green, red
The on-response and off-response areas of the receptive field of ganglion cells make up a ___ shape.
Donut
Cells that depolarize when light hits the centre of their receptive field are called …
On-centre cells
Which cell type responds to high contrast and colour?
P cells
Motion information is conveyed by …
M cells
What is the correct pathway from the eye to the cortex – primary pathway?
1) Optic nerve
2) Optic chiasm
3) Optic tract
4) LGN
5) Visual cortex
Four of the six LGN layers contain …
Parvocellular layers
Cortical cells that respond to stimuli in the shape of a bar or edge with a particular orientation in a particular location on the retina are called …
Simple cells
The magnocellular path way gives rise to the
Dorsal stream
Your ability to recognize your particular car in a crowded parking lot is mediated by …
The ventral stream
What are opponent colours according the to the opponent process theory?
Blue and yellow
The reduced ability of the lens to accommodate is called …
Presbyopia
Your older neighbour wears reading glasses due to …
Presbyopia
Most people who wear glasses from a young age do so because …
They are unable to see things clearly that are far away – myopia
If Trevor specifically has trouble recognizing you and all other familiar people as well, he may suffer from …
Prosopagnosia
