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Terms in this set (54)
What is perception?
"The mechanism by which the brain interprets sensory info received from the environment"
Sensation = Detection
Perception = meaning, processing, interpreting
"detects sensory information"
Primary Sensory Cortex
Describe Association Areas
- recognizes specific sensory modality and assigns meaning and importantce to the sensation
Describe Multimodal Association Areas
Integrates information from 2 or more sensory modalities. Make associations between different types of stimuli.
- Posterior and Anterior Regions
What does the Posterior Multimodal Region do?
- "puts it all together"
What does the Anterior Multimodal Region do?
- even more cognition applied... emotional, judgement, problem solving,
(yellow light example)
Describe the Perception to Motor OUT Pathway
- Information integrated in multimodal association areas
- Sent to the prefrontal cortex (anterior multimodal area) to make decisions about motor plan options
- Sent to premotor area (motor association area) to access on motor plan
- Primary motor area implements the motor plan
"Difficulty identifying and recognizing familiar objects and people despite having intact visual structures"
Visual Perception Disorder (VPD)
- object recognition deficit, objects and ppl
- Faces & Facial Expression
- inability to perceive more than one object at a time
- "whole picture"
- hospital example
- visual distortion of objects
- thinking the water bottle weighs like a cotton ball
- inability to recognize colors
- colors of common objects
- sky, blue, grass, green, banana, yellow
- Inability to name the specific color of objects.
- "what color is this? give option of grab the green pen from 3 pens, they can do it just cant name"
"Difficulty interpreting spatial relationship between their bodies and objects in the environment"
Visual-Spatial Perception Disorders (VSPD)
R/L Discrimination Dysfunction...
- self explanatory
Depth Perception Dysfunction...
- Inability to determine whether objects in the environment are near or far in relation to each other and in relation to the patient.
- stairs, doorways
Figure Ground Discrimination Dysfunction...
- inability to distinguish objects in the foreground from objects in the background
- ispy example
- difficulty in understanding and remembering the relationship of one location to another
- relationship between 2 locations
- example even within a home, using GPS even to get home,
Form Constancy Dysfunction...
- Unable to recognize various forms, shapes and objects, regardless of their position, location or size
- different sizes or positions of object
- a hat on its side is still a hat, or small forks vs bigs forks in drawer
- Difficulty using concepts relating to positions, such as up/down, in/out, and behind/in front
- give them lots of directions and theyll have trouble... "take phones and put them under table"
"Difficulty attaching meaning to objects in the environment by touch alone"
Tactile Perception Disorders
- inability to judge the form of an object by touch (touch alone)
- ahylognosia & amorphagnosia
inability to discriminate between different types of materials by touch alone
- wood, metal. plastic, clothes
Inability to discriminate between different forms/shapes by touch alone
- "that is round so it might be an egg" can't do that
2-Point Discrimination Dysfunction...
- inability to determine whether one has been touched by 1 or 2 points
- inability to recognize symbols, letters or numbers traced on the skin
Extinction of Simultaneous Stimulation...
- Inability to determine that one has been touched on both sides of the body
"Distorted awareness of one's body in space"
Body-Schema Perception Disorders (BSPD)
- inability to distinguish between fingers
- identify & localize fingers
- The inability to interpret stimuli and events on one side of body or environment
recognizing own body
Extinction of Simultaneous Stimulation..
Body Schema and Tactile Perceptual Disorder
Inability to determine that one has been touched on both sides of the body.
"Difficulty with reception or expression of language"
Language Perception Disorders (LPD)
What are the two types of Language Perception Disorders?
Receptive and Expressive
Unable to understand language
Inability to read
Difficulty comprehending gestures and symbols
- The inability to infuse language with its normal emotional content.
- flat gestures, tonal inflections
- inability to produce speech
inability to name objects
- omission of grammatical elements
- difficulty arranging words to form sentences
- loss of ability to express thoughts in writing
- writing intelligible words and sentences
breaking words into letters
difficulty calculating math problems
"difficulty with motor planning"
Motor Perception Disorders (MPD)
- inability to formulate an initial motor plan and sequence tasks where the proprioceptive input necessary for movement is impaired
- does not understand IDEA
- person plans a movement or task, but cannot volitionally perform it. Automatic movement may occur, however, a person cannot impose additional movement on command
- understands idea but not bale to form the plan
inability to dress oneself because of a disorder in body scheme and/or spatial relations
specific to copying or building 2D and 3D designs
What are some common "in-depth" assessments for Percptual Dysfunction?
- Arnadittir OT-ADL Neurobehavioral Evaluation (A-ONE)
- Assessment of Motor and Process Skills (AMPS)
- Lowenstein Occupational Therapy Cognitive Assessment (LOTCA)
- Catherine Bergego Scale (CBS)
- Motor-Free Visual Perception Test, 4th ed. (MVPT-4)
Describe how perceptual dysfunction affects participation in occupational performance
- Self-awareness of perceptual dysfunction is an important factor for intervention
- Lack of awareness poses larger safety risk
- Intervention Approaches: Remedial
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