Cog Neuro Quiz 4: Sensation & Perception Flashcards
T or F? The cornea and lens are the main refractive surfaces of the eye
True
T or F? Cones contribute to color vision, rods do not
True
T or F? There are a greater number of M compared to P ganglion cells
False
T or F? The tectopulvinar system is for conscious visual processing
False
T or F? The eardrum vibrates at the frequencies of sound waves that enter the ear
True
T or F? The ossicles are three small bones located in the outer ear
False (inner ear)
T or F? The organ of corti is located inside of the cochlea
True
T or F? Inner hair cells alter the amount of tension on the tectorial membrane
False
To take this quiz, you must read and process the information. The ability to organize the black marks on the paper into meaningful patterns involves the subjective process of..
Perception
To take this quiz, you must read and process the information. The initial step of your eyes detecting the black marks on the page depends on the process of…
Sensation
Rods are more sensitive to light, while cones are better at detecting fine detail. Which of the following concepts helps explain this difference?
Convergance
Information from the rods is carried to the _____ of the thalamus by the _______ ganglion
LGN; M
Low frequencies cause maximal displacement at the apex of the _____
Basilar Membrane
Movement in the direction of the tallest cilia of our inner hair cells results in ______, which leads to firing in the auditory nerve
depolarization
Karen was an avid hunter, but rarely wore ear protection when firing her rifle. Lately, she has noticed that she cannot hear certain high frequencies at all, and others sound muffled. Which part of her auditory system is most likely damaged from repeated exposure to loud noises?
Inner hair cells
What type of hearing loss is Karen, the avid hunter, experiencing?
Sensorineural
The image created on the retina is upside-down and left/right inverted due to how the cornea and lens bend light. We don’t perceive the world as upside down because the brain flips the image. Why does the brain flip the image back instead of keeping it upside down and left/right inverted?
The brain flips the image back so that we can process the information correctly and guide our movement.
Each eye has a nasal retina/path and a temporal retina/path. How do they differ?
Nasal crosses to opposite lens and temporal does not.
Is the figure below illustrating what happens when light is present or absent?
Light is present because the end result is Bipolar cell is depolarized. and glutamate increases
Two patients who have had strokes enter your office. You show them three objects: a pen, a phone, and a watch. Both patients can see the objects in front of them. Patient A does not recognize the objects’ names or uses. Patient B correctly tells you what each object does but cannot identify the names.
Which of the two main visual systems/pathways are involved in both patients’ symptoms: geniculostriate or tectopulvinar?
Which visual stream is affected in each patient: dorsal or ventral?
- geniculostriate system
- both patients affected by ventral stream
