Perception Flashcards
What is the difference between colour agnosia and colour anomia?
Colour agnosia is the inability to remember and recognize the colours of familiar objects, while colour anomia is the inability to name colours despite being able to perceive them.
Describe a functional assessment for figure-ground discrimination.
A functional assessment for figure-ground discrimination during dressing could involve asking the client to identify a white undershirt placed on a patterned bedspread. Difficulty in locating the shirt indicates a deficit in distinguishing the foreground (shirt) from the background (bedspread).
What is the key characteristic of ideomotor apraxia? How does it differ from ideational apraxia?
Ideomotor apraxia is characterized by the inability to perform a motor act on command or imitation, but the individual can perform the action spontaneously when using the actual object. In contrast, individuals with ideational apraxia have difficulty understanding the concept of the action and using objects appropriately.
Explain the concept of stereopsis and its importance in daily life.
Stereopsis is the ability to perceive depth and distance using both eyes. It is crucial for tasks like navigating stairs, driving, and playing sports as it allows us to judge distances and interact safely with our surroundings.
How would you assess for simultanagnosia using a visual stimulus?
To assess for simultanagnosia, present the client with a complex picture containing multiple elements. Ask them to describe the scene in detail. An individual with simultanagnosia might only describe individual elements without connecting them to the overall scene or context.
What is the difference between agnosia and apraxia?
Agnosia refers to the inability to recognize and identify sensory information, such as objects or faces, despite intact sensory pathways. Apraxia, on the other hand, is a disorder of purposeful movement, affecting the ability to plan and execute motor actions despite intact motor function and comprehension.
Define metamorphosia and describe a potential assessment method.
Metamorphosia is a visual distortion where objects appear altered in size, shape, or weight. Assessment can involve presenting the client with objects of varying sizes and weights and asking them to arrange them in order based on visual observation alone. Inaccurate perception suggests metamorphosia.
Why is it important to assess for basic sensory and motor functions before evaluating for praxis?
Assessing basic sensory and motor functions before evaluating for praxis is essential because deficits in these areas can mimic apraxia. For example, weakness or sensory loss can impair movement execution, making it difficult to determine if the difficulty stems from a motor planning deficit (apraxia) or a primary sensory or motor impairment.
Explain how constructional disorder can impact daily living activities.
Constructional disorder can significantly impact daily activities like dressing (difficulty orienting clothing), following instructions involving spatial concepts (assembling furniture), and organizing tasks requiring spatial arrangement (loading a dishwasher).
Describe a method for assessing finger agnosia.
To assess for finger agnosia, occlude the client’s vision and touch one of their fingers. Ask the client to identify the finger being touched by name. An inability to do so suggests finger agnosia.
