Exam 6: Object Recognition

The term associative visual agnosia is reserved for patients who

Optic ataxia is to associative visual agnosia as ________ lesions are to ________ lesions.

A major source of evidence against the idea that faces are processed in a special neural region in humans is that the candidate region

What are some of the ethical issues that come up regarding mind reading? Describe the potential pros and cons of "mind-reading" technologies.

What categories of visual stimuli have regions of cortex that are activated when a person views examples from each category? Describe one approach that can establish a causal role of each region for perceiving these categories. Why is this evidence that these regions are involved in processing these categories?

Three primary localized regions include face, place, and clothes areas.

A role of the dorsal visual system in computing the way in which a movement should be produced argues for a dichotomy between

Explain a category-based and property-based organization of semantic knowledge. Discuss evidence in favor of each account.

Why is object constancy a difficult computational problem for the visual system? Describe some potential changes that can occur when we view the same object under different circumstances.

A person with a visual agnosia has difficulty in recognizing drawings of familiar objects, such as an apple. If she were asked to imagine an apple rather than to inspect a picture of an apple, you would expect to find that

Cells that respond to the human hand are located in the _____________, and their responsive firing rate is high regardless of the hand's __________.

Which of the following disorders may be associated with impaired facial perception?

The "what" versus "where" distinction is supported by single-cell recording studies showing that neurons in the ________ lobes have receptive fields that are almost always located in the fovea, where high-acuity vision takes place.

Warrington (1985) proposed an anatomical model of the cognitive operations necessary to explain object recognition. The first stage in this model involves the detection and categorization of visually invariant information, which occurs in the ________ hemisphere; the second stage involves the semantic categorization of visual input, which occurs in ________ hemisphere(s).

Why do people fail to notice when the mouth and eyes of an inverted face remain upright?

Category-specific deficits may be an emergent property of the fact that different kinds of information are needed to recognize living and nonliving objects.

The patient D.F., studied by Goodale and Milner (1982), had severe problems with object recognition. When presented with a circular block into which a slot had been cut,

There is some evidence for a double dissociation between agnosia for animate (living) things compared to inanimate (nonliving) things. Does this mean that there are distinct brain systems for representing these two categories? Why or why not?

Pohl (1973) conducted a study of the "what" and "where" pathways in brain-lesioned monkeys using two different tasks: a landmark discrimination task, which required a visuospatial judgment, and an object discrimination task, which required object recognition. He found that monkeys with temporal lobe lesions became severely impaired in learning the ________ task but not the ________ task. Monkeys with posterior parietal lesions showed the ________ pattern of performance.

There are various issues with the idea that single neurons encode the mental representations for all possible complex visual stimuli. Which of the following is NOT one of these issues?