Week 14: Perceptual Screening

perception

ability to interpret or attach meaning to sensory information from external or internal environments

visual perceptual disorders

difficulty identifying and recognizing familiar objects and people

visual agnosia

inability to identify and recognize familiar objects and people despite intact visual anatomical structures

prospagnosia

inability to identify familiar faces

simultagnosia

inability to interpret visual stimulus as a whole; sees details but not entire scene

metamorphosia

visual distortion of the physical properties of objects; bigger/smaller, lighter/heavier

color agnosia

inability to remember the appropriate colors for specific objects

color anomia

inability to remember the names of colors

visual spatial perceptual disorders

difficulty accurately interpreting spatial relationships between their bodies and objects in the environment

left-right discrimination dysfunction

inability to accurately use the concepts of left and right

figure-ground discrimination dysfunction

inability to distinguish objects in the foreground from objects in the background

form constancy dysfunction

inability to recognize subtle variations in form or changes in form such as size variation

position in space dysfunction

difficulty using concepts relating to position such as up/down, behind/in front

topographical disorientation

difficulty comprehending the relationship of one location to another

depth perception dysfunction

inability to determine whether objects in the environment are near or far in relation to each other or the individual

tactile perceptual disorders

difficulty attaching meaning to objects in the environment by touch alone

astereognosis

inability to identify objects by touch alone

ahylognosia

inability to discriminate between different types of materials by touch alone

amorphagnosia

inability to discriminate between two different forms of touch alone

2 point discrimination dysfunction

inability to determine whether one has been touched by one or two points

agraphesthesia

inability to interpret letters written on the palmar surface of the hand

extinction of simultaneous stimulation

inability to determine that one has been touched on both sides of the body

body schema perceptual disorders

disoriented awareness of their body or specific body part such as a hemiplegic limb

finger agnosia

impaired perception of the relationship of fingers to each other

unilateral neglect

inability to integrate and use perceptions from one side of the body or one side of the environment

anosognosia

failure to recognize one’s paralyzed limb as their own

extinction of simultaneous stimulation (body schema)

cannot identify area of stimulation on involved side when touched on both sides at the same time

language perceptual disorders

difficulty with expression or comprehension of language; collectively known as aphasias

alexia

inability to comprehend the written word or the inability to read

dyslexia

impaired ability to read, impaired ability to break down the written language into letter

asymbolia

inability to comprehend gestures and symbols

aprosodia

inability to comprehend tonal inflections used in conversations

anomia

inability to remember and express the names of people and objects

agrammatism

inability to arrange words sequentially so they form intelligible sentences in conversations or writing

agraphia

inability to write intelligible words and sentences

dysgraphia

inability to write because the individual cannot break words into letters

acalculia

inability to calculate mathematical problems

motor perceptual disorders

difficulty with motor planning; inability to implement a specific motor action as required by environmental demands

ideational apraxia

inability to cognitively understand the motor demands of a multiple, sequential step task

ideomotor apraxia

loss of kinesthetic memory of motor patterns

dressing apraxia

inability to dress oneself due to body schema disorder or apraxia

2 and 3 dimensional constructional apraxia

inability to copy or build 2-3 dimensional designs