Chapter 7 Quiz Flashcards
Fill in the Blank: The lateral geniculate nucleus (LGN) is the part of the ____________ that receives visual information from the eye and transmits it to the visual cortex.
thalamus
Fill in the Blank: Helmholtz predicted that the eye contained specialized cells that were red-sensitive, blue-sensitive, and green-sensitive. This theory is known as the ________________ ______________ (2 words).
trichromatic hypothesis
Cones in the retina form synapses with which of the following cell types?
Bipolar Cells
Individuals with blindsight have no conscious ______________ of visual stimuli but are still able to maneuver through obstacle courses
perception
True/False: The scotopic visual system is in the retina and operates at low levels of light
True
Cones are more densely clustered in the center of the retina, known as the _________. This helps give us better visual acuity.
Fovea
True/False: If area V5 in a person’s brain is damaged, they will have difficulty perceiving motion.
True
Visual information can be seen to travel along two separate processing pathways. The _____________ processes information related to spatial information (known as the “where” stream) and the ____________ processes object information (also called the “what” stream).
dorsal; ventral
True/False: Males inherit color blindness more often than females because the genes that program the M and L pigments in the cones are carried on the X-chromosome.
True
Optic Ataxia- “Spatial disorientation in which the patient is unable to accurately _________ for objects using visual guidance.
reach
Amblyopia is a condition where one eye does not move in sync with the _________ resulting in a “lazy eye”
other
The ciliary muscles contract and relax as they adjust the thickness of the lens and focus images on the retina. This process is called:
Accommodation
Photopic Visual System is a system in the retina that operates at ______ __________ of light, shows sensitivity to color, and involves the cones
high levels
Photoreceptor a neural cell in the retina that responds to _______
light
Ganglion cell- any of a class of cells in the ________ whose axons form the optic nerve
retina
_______ nerve- cranial nerve ll; the collection of ganglion cell axons that extends from the retina to the brain
Optic
__________ inhibition- the phenomenon by which interconnected neurons inhibit their neighbors, producing contrast at the edges of regions
Lateral
