Chpt.2 Sensation and Preception Flashcards
Damage to the Optic track is the result of what
-Homonymous Hemianopsia
What is Homonymous Hemianopsia?
half vision with both eyes; where damage is- it is on the opposite side
What is the difference between Homonymous Hemianopsia and Unilateral neglect?
a. damage to optic track
b. visual field/eyes are completely in tact, but cant usuallysee LEFT side; in attention to one side. Happens more when its on the R. side of Brain
What is Unilateral neglect?
- damage to dominant hemisphere (usually R. side)
- less awareness
- in attention to one side
What is ‘Auditory Figure Ground’
you aren’t able to pick out a voice- it is all a loud background noise
Aphasia?
inability to understand language
What is Sensation?
-the Passive process of bringing information from the outside world into the body and brain
What is Perception?
-the ACTIVE process of SELECTING, ORGAINIZING, and INTERPRETING the information brought to the brain by the senses
How does sensation + perception work together
a) sensation absorb physical stimulus to environment and sends impulses to brain
b) brain organizes information and translates it into something meaningful
What are some perceptual functions?
- vision: depth
- auditory figure ground
- body awareness
- form constancy
- motor planning
What are 3 ways perception is assessed?
- Standardized assessment
- Observation during FUNCTIONAL tasks and activities
- Reports from family/proffesionals
(not that important) What are some sensational (touch perception) functions?
- light touch
- deep pressure
- temperature
- moving touch
- 2-point discrimination
What is Agnosia?
unable to IDENTIFY an object by looking at it (is able to know how to use scissors but wont be able to identify scissors ontop of the table)
What is Prosopagnosia?
the inability to recognize FAMILIAR FACES (usually figures it out when the person speaks)
What is Gnosia?
the faculty of perceiving and recognizing
What is Asterognosis?
-inability to “see” with our hands (can’t recognize objects in our hands by using fine motor with closed eyes, rely on vision)
What is Asomatognosia
-severe loss of BODY SCHEME. Usually evaluated by having client point to different body parts on command or by imitation.
What is Apraxia
the inability to perform purposeful movement despite normal motor power, and coordination.
Describe:
- ideational
- ideomotor
- constructional
- dressing
- errors in content of task (ex. uses a screwdriver as a knife
- can’t perform a motor act on command (ex. if you tell them to walk across the room, they are confused)
- cant copy/construct a design (ex. load a dishwasher)
- trouble dressing (ex. wear pants on arms)
What is Proprioception?
-the sense that tells us where we are in space, awareness of position in relation to environment and to other body parts
What are some mental abilities you need to have when dressing?
- concentration
- memory
- problem solving
- spacial relationships
- equilibrium and righting reactions
What are some physical abilities needed to dress?
- weight shift
- trunk rotation
- head alignment
- motor planning
**Some deficits with Homonymous Hemianopsia?
-throwing/catching ball
-pouring water into a cup
stepping off a step
(Not that important) What is Heteronymous Hemianopsia?
-a loss of vision in either or both “nasal halves” (inside of eye) or both “temporal halves” (outside)
Signs/Symptoms of Hemianopsia?
- bumps into things
- tilts head to observe objects
- loses place while reading
- startled by objects that”suddenly” appear
Are people aware that they have difficulty when they have Unilateral Neglect? Which side is usually neglected?
No; often only dress half of body, because they are not aware of it
-the left side because there is a lesion in the RIGHT-frontal parietal lobe
Treatment strategies for Unilateral Neglect
- encourage eye and head movements to neglected side
- help patient to regularly look over to their neglected field
