Mystery???
A psychophysical researcher wants to measure the absolute threshold of a particular fragrance. He wants quick results and can compromise on its accuracy. In this scenario, he would use this method.
What is the method of adjustment
When a cell is at rest, it has a membrane potential of this many mV.
What is -70mV?
A light source emitting a wavelength of approximately 700 nm would be perceived as this color.
What is (dark) red?
This is an imaginary diameter line from the front to the back of the eye, passing through the center of the lens.
What is the optic axis?
Damage to the fusiform face area (FFA) will result in this.
What is prosopagnosia?
The area of the retina that does NOT contain any photoreceptors is called this.
What is the optic disk (blind spot)?
When an action potential begins, depolarization of the axon membrane is the result of the influx of these ions.
What are Na+ ions?
This is the property of light that we experience as brightness.
What is amplitude?
These are the three layers of membranes in the eye (from outer to inner)).
What are the the sclera, the choroid, and the retina?
Another name for hyperopia is this.
What is far-sighted?
The density of this type of photoreceptor rises rapidly within a short distance of the fovea.
What are rods?
Which hemisphere(s) of the brain represents the right visual field?
What is the left?
Accommodation for a near object requires this kind of lens.
What is a "plump" lens?
This is the term used for the ability of the lens to adjust its shape to focus on objects at different distances from the eye.
What is accommodation?
CHALLENGE! Dr. Frazer has what two eye problems that you have learned about?
What are strabismus and myopia?
According to the principles of perceptual grouping clarified by the Gestalt psychologists, this principle states that elements that move in unison are likely to be perceptually grouped.
What is common motion?
This visual property is processed by the magnocellular layers
What is motion?
The photopigment in these is MOST sensitive to short-wavelength light, with a peak sensitivity at 443 nm.
What are S-cones?
Which cells in the retina send action potentials to the brain via the optic nerve?
What are retinal ganglion cells?
10% of the axons in the optic tract synapse in this area of the brain.
What is the superior colliculus?
According to the principles of figure–ground organization, a region with symmetrical borders is more likely to be seen as a _____, and a region with convex (outward-bulging) borders is more likely to be perceived as a _____.
What is a figure; a figure?
These layers of the LGN have small(er) cell bodies
What are the parvocellular layers?
Surfaces that appear to be this color under heterochromatic light reflect all wavelengths of light equally.
What is white?
The "business ends" of the photoreceptors, where transduction occurs, are embedded in a layer of cells called what?
What is the pigment epithelium?
Patients suffering from this have difficulty completing visually guided reaching tasks in the absence of other sensory cues.
What is optic ataxia?