Question 1

__________ refers to a severe deficit in the ability to perceive sensory information,usually related to the visual sensory modality.

Accepted Answer

Agnosia is a severe deficit in the ability to perceive sensory information, usually related to a specific sensory modality. Visual agnosia specifically refers to difficulty recognizing and identifying visual stimuli. Amnesia refers to a deficit in memory. Dyslexia refers to difficulty reading, and aphasia refers to difficulty with language and communication.

Question 2

Upon seeing a pair of eyeglasses,a patient with __________ noted first that there was a circle,then there was another circle,then a crossbar,and finally guessed that he was looking at a bicycle.

Accepted Answer

The patient's difficulty in recognizing or identifying a common object (eyeglasses) suggests visual-object agnosia, which is characterized by the inability to recognize visually presented objects despite having intact vision. The patient's observation of individual features (circles and crossbar) without being able to integrate them into a coherent whole is also typical of this condition. The patient's guess that the object was a bicycle may suggest a failure to recognize the object's functional use.

Question 3

Nancy has a difficult time with perceiving very specific sounds.This would be an example of what type of agnosia?

Accepted Answer

Nancy's difficulty with perceiving specific sounds points towards an auditory agnosia, which is the inability to recognize or differentiate between specific sounds. This type of agnosia affects the auditory system, which can range from difficulty in differentiating between language sounds to something as specific as not being able to differentiate between different notes in music.

Question 4

Alice can see objects with no problem.However,she cannot see objects actually in motion.She says that it is like receiving snapshots of the word because objects appear in one location and then in another with no sense of how they got there.

Accepted Answer

The symptom described is consistent with akinetopsia, which is a rare neurological disorder that affects motion perception. It is characterized by the inability to see objects in motion, with the perception of the world as frozen snapshots or a sequence of still frames.

Question 5

This perceptual deficit is thought of in terms of damage to the "how" visual pathway,and results in difficulties with using ones visual system to guide one's own movements.

Accepted Answer

Optic ataxia is a deficit that results specifically from damage to the "how" visual pathway, which is responsible for using visual information to guide one's own movements. It can lead to difficulties with visually guided movements, such as reaching for an object. Tritanopia is a form of color blindness affecting the blue-yellow spectrum, akinetopsia is the inability to perceive motion, and apoptosis is a type of cell death. None of these are directly related to difficulties with visually guided movements.

Question 6

This part of the brain seems to play an important role in the recognition of faces.

Accepted Answer

The fusiform gyrus is a region located in the temporal lobe and is known to be involved in the recognition of faces. It is also commonly referred to as the "face area" or "fusiform face area" (FFA) in the literature. Therefore, choice A is the best answer. The inferior colliculi are involved in auditory processing, the dorsal raphe nuclei are involved in mood regulation and sleep/wake cycles, and the lateral geniculate nuclei are involved in visual processing of the optic nerve. These regions are not specifically associated with facial recognition.

Question 7

This form of color deficiency is when a person has a difficult time with medium wavelengths had have a difficult time with green colors.

Accepted Answer

Deuteranopia is a form of color blindness in which medium wavelengths are difficult to distinguish, therefore, making it difficult to perceive green colors.

Question 8

This type of agnosia,due to a failure in perceptual processing,results in a failure to recognize an object.

Accepted Answer

Apperceptive agnosia is a type of agnosia that involves a failure in perceptual processing, leading to an inability to recognize an object. In apperceptive agnosia, patients may be able to describe basic features of an object but cannot form a unified percept of the object as a whole. This contrasts with associative agnosia, where patients can form a percept of an object but cannot link it to its name or meaning. Auditory agnosia refers to a deficit in recognizing nonverbal sounds, while achronatopsia refers to a deficit in perceiving time.

Question 9

What is perceptual constancy and why is it important?

Accepted Answer

The answer of What is perceptual constancy and why is...

Question 10

This particular color deficit is the result of a malfunction in one of the mechanism for color perception in which the person may have a difficult time distinguishing particular colors.

Accepted Answer

Dichromacy is the type of color vision deficiency where there is a malfunction in one of the mechanisms responsible for color perception, leading to difficulty distinguishing particular colors. This is different from monochromacy (D) which is a total color blindness, and achromatopsia (A) or complete color blindness, and akinetopsia (B) which is a disorder that affects motion perception. Therefore, C is the best choice.

Question 11

This particular color deficit is true color-blindness in that the person really has no ability to see any color.

Accepted Answer

Monochromacy is the complete absence of color vision, also known as total color blindness. People with this type of color blindness only see shades of gray and have no ability to distinguish any colors. Deuteranopia and protanomaly are both types of red-green color blindness, where the person has difficulty distinguishing between shades of red and green. Dichromacy generally refers to any types of color blindness where the person is only able to see two primary colors, rather than the usual three.

Question 12

This particular deficit in perception is defined as when a person has a difficult time navigating the everyday environment (e.g. ,fails to recognize landmarks,gets lost on familiar routes).

Accepted Answer

Spatial agnosia refers to difficulty in perceiving and navigating the spatial environment. The symptoms include difficulty recognizing landmarks and getting lost on familiar routes. Simultagnosia refers to difficulty in perceiving multiple objects at once, prosopagnosia refers to difficulty in recognizing faces, and visual-object agnosia refers to difficulty in recognizing objects despite intact perception of their features.

Question 13

With this type of agnosia,perceptual processing is fine.The person can represent objects visually but is unable to use the information to recognize things.

Accepted Answer

Associative agnosia is a type of agnosia where perceptual processing is intact, but the person is unable to use the information to recognize or assign meaning to objects. This means they can represent objects visually, but cannot identify what they are or what they are used for. A person with associative agnosia may be able to draw a picture of an object from memory, but be unable to label or describe the object.

Question 14

Define akinetopsia and achromatopsia.

Accepted Answer

The answer of Define akinetopsia and achromatopsia....

Question 15

This form of color deficiency is when a person has a difficult time distinguishing between the reds and the greens.In general,they have difficulties with the longer wavelengths (red).

Accepted Answer

The description given matches with Protanopia, which is a color vision deficiency where individuals have trouble distinguishing between red and green colors because the cone cells that detect longer wavelengths (red) are absent or not functioning properly.

Question 16

What are the monocular depth cues?

Accepted Answer

The answer of What are the monocular depth cues?...

Question 17

Someone with this hereditary disorder is born with no cones in the retina and they rely solely on their rods for vision.

Accepted Answer

The answer of Someone with this hereditary disorder is born...

Question 18

A person with this form of color deficiency can see only shades of gray and truly no color what so ever.The person has cones but the cones are nonfunctional.

Accepted Answer

Rod monochromacy is a rare form of color blindness where a person has no functioning cones and can only see shades of gray, similar to how things look in very low light conditions. It is also known as achromatopsia. Akinetopsia is the inability to perceive motion, deuteranopia is a type of red-green color blindness where the person has no functioning green-sensitive cones, and tritanopia is a type of color blindness where the person has no functioning blue-sensitive cones.

Question 19

Disturbance in the temporal region of the cortex can lead to __________,in which a person is unable to pay attention to more than one object at a time.

Accepted Answer

Simultagnosia is a condition in which a person is unable to perceive more than one object at a time due to disturbance in the temporal region of the cortex. Visual-object agnosia is the inability to recognize objects, and time amnesia and time agnosia refer to the inability to perceive or remember time.

Question 20

Melanie has a peculiar perceptual deficit.She can sense all parts of her visual field,but the objects she sees do not mean anything to her.This phenomenon is called

Accepted Answer

The phenomenon described in the question is a classic case of visual-object agnosia, which is a type of agnosia characterized by difficulty in recognizing visually presented objects. The other options are not relevant to the description given in the question.

Quiz 3: Perception