Week 2 - Perceptual Deficits Flashcards
A hemisphere in the brain which controls (R) sided voluntary movements and is responsible for the verbal-analytical activities
Left hemisphere (dominant)
A hemisphere which controls (L) sided voluntary movements and is responsible for visuo-spatial functions
Right hemisphere (non-dominant)
Type of unilateral neglect where there is a failure to generate movement responses to a stimulus even though person is fully aware of the stimulus and can not be explained by weakness
Motor (output neglect, intentional neglect)
Failure to respond, report, or orient to stimuli presented to the contralesional side of the body or space and this failure can not be attributed to either sensory or motor deficits
Unilateral spatial neglect
Type of unilateral neglect where there is unawareness of sensory stimuli on the contralesional side. Can be visual, auditory, or somatosensory
Sensory (inattentive, attentional neglect)
What is extinction?
Failure to respond to recognise a stimulus on the affected side when simultaneous stimuli are presented on both sides of the body in the same area
Representational/imagery neglect
Ignores contralaesional half of the internally generated images (eg. ask patient to visualise task, action/environment but they can only remember half)
How do we assess for visuospatial neglect?
- Observe how patient moves within the environment
- “Point at all blue chairs in the room”
- Drawing tests: clock, house, line bisection
- Tests for double simultaneous stimulation for sensory and visual inattention
What is egocentric neglect?
Ignoring items on the left side of a display
What is allocentric neglect?
Ignoring the left side of items regardless of position in the display
What is agnosia and what are the 3 types?
It is a perceptual deficit that deals with a person’s lack of recognition of familiar objects as perceived through senses
- Visual: patient may fail to recognise family or physician
- Tactile: inability to recognise object by touch
- Auditory: unable to determine familiar sounds (eg. piano in background, but patient is unable to recognise whether audio is piano or drum)
Unaware of own body parts, disturbance in perception of own body parts. Patient may deny owning a limb and can neglect on side of the body
Autotopagnosia
Unawarenesss of a condition or denial of an illness. Minimises responsibility for resulting problems (eg. blind patient: “room is so dark please turn light on)
Anosognosia
What is motor impersistance?
Failure to persist in/sustain a motor activity/contraction due to inability to sustain directed attention (eg. keeping eyes closed, get stuck/lose track half way through reaching task)
What is (R) (non dominant) hemisphere - Constructional apraxia?
Impairment in producing designs in 2 or 3 dimensions by copying, drawing, and or constructing, whether on command or spontaneously. Patients can’t incorporate spatial information into task
What is (R) (non domintnat) hemisphere - Dressing apraxia?
Inability to dress oneself because of a disorder in body scheme and/or spatial relations (clothes inside out/upside down)
What is topographical disorientation?
Inability to find one’s way in familiar surroundings or to learn in a new situation. Having difficulty in understanding and remembering relationships of places to one another
How do we assess for topographical disorientation?
- Ask patient to draw floor plan of home
- Show way back to ward/how to move from room to physio room
- Ask them to walk you through plan
How do we assess for constructional apraxia?
- 2D tests: drawing, copying matchstick patterns
- 3D tests: copying block designs, puzzles
- Use verbal strategy since trouble with spatial
How do we assess dressing apraxia?
- Observe patients attempting to dress, note problems
- Use cues, colour codes, labels, set procedures
What is poor spatial judgement and how do we assess it?
Inability to judge distance, depth, size or shape. Verticality (position of self, position of objects in external environment)
Ask patient to identify which object is bigger/closer. Hold up stick against plain background and ask patient if it is upright
What is (L) (dominant) hemisphere - Ideomotor apraxia?
Inability to imitate gestures/perform purposeful movement on command even though concept is fully understand
How to help with ideomotor apraxia?
Do not break movement/task up into separate parts, train task as a whole
What is (L) (dominant) hemisphere - Ideational apraxia?
Inability to carry out activities automatically or on command because no longer understands concept or idea behind the act (eg. might put shoes on before socks)
