wk 2 VISION Flashcards
Exam study
What do areas MT and MST have in common?
They both generate motion percepts
Which stream includes V1 and the inferior temporal lobe, and is associated with vision for perception?
The ventral ‘what’ stream
Which stream includes V1 and the parietal lobe (and other visual areas), and is associated with vision for action?
The dorsal ‘where’ stream
Name the order of cells at the back of the eye beginning w photoreceptors
Photoreceptors, horizontal cells, bipolar cells, amacrine cells and ganglion cells
Which stream (ventral or dorsal) is associated with spatial relationships?
Dorsal stream
Which stream (ventral or dorsal) is associated with form and colour perception?
Ventral stream
The fMRI effect described below is known as:
“if the 2nd repetition causes suppression, then the stimulus must share a process supported by that region”
fMRI adaptation
The LGN is in which part of the brain?
The thalamus
V1- which layer receives axons from the thalamus?
Layer 4
V1- which layers project to occipitol, parietal and temporal extrastriate cortical areas and back to the thalamus?
Layers 1 &5
Visual topographic information is present at which levels of the visual pathway?
Retina, thalamus and V1
What is the objective physical
correlate of lightness and brightness?
Luminance
Which 3 percepts combine to create what we think of as colour?
Hue, saturation (degree to which grey is approached) and brightness
Which technique measures radiowaves as protons gradually return to their original configuration within the magnetic field, releasing the energy?
MRI
How often does sampling occur during fMRI?
Every 2-3 seconds
A patient is unable to name objects but can accurately put a letter in the postage slot. She likely has damage to her____, with lesions directly over the____
ventral stream, LOC (lateral occipital cortex)
Which part of the visual cortex features retinotopic (topographic) mapping and orientation-preference (respond to ‘low level’ stimulus)?
V1
Reflectance, illumination and transmittance all result in _______, which represents the inverse problem.
Luminance
The same reflected wavelengths appear to be different in colour depending on surroundings, this is called colour ______
Different w.lengths appear to be the same colour, this is called _________
Colour contrast, constancy
Neural interactions of CNS which happen before activity reaches the cerebral cortex is called _______ processing
subcortical
Arrange in the correct order: optic chiasm, superior colliculus (orients head & eye m.ments), V1, optic tract, LGN, retina, optic radiation, optic nerve
Retina, optic nerve, optic chiasm, optic tract, superior colliculus, LGN, optic radiation, V1
fMRI adaptation experiments are looking at which part of the brain? (Think object form processing)
LOC- Lateral occipital complex
