Case Study - MR Flashcards
What disorder does MR Suffer from?
Ideomotor apraxia, in which there is a disorder in the execution of motor tasks which is likely due to the dissociation between the mental representations of an ability an the execution
Which researcher studied her?
Clark et al (1994)
What were the locations of the patients lesions ?
Right parietal
According to Heilman (1979) which parietal cortex is the important one because it is related to higher order motor planning and processing?
The dominant one
What were MRs impaired functions?
Right homonymous hemianopia
Memory impairment
Ideomotor apraxia
Transcortical sensory aphasia
What tasks were used to test MR?
Slicing bread task
Gave graded cues from verbal “pretend you’re slicing bread” to a load of bread, a knife and then both.
In the slicing bread task what hand did every have to use to slice the bread and why?
Left hand
Because then any deficits in the apraxic patients would be due to a disorder of high level movement control rather than muscle weakness or incoordination
There are two hypotheses, the disconnection hypothesis and the motor memory hypothesis, which one does MRs results support?
Motor memory hypothesis because the representations for skilled motor abilities have been lost when you destroyed the spatial -temporal movement representations in the parietal lobe.
Who came up with the motor memory hypothesis ?
Heilman (1979)
What were the cutting motions of apraxic patients like? What does this suggest the impairment is?
Circular and less planar. Impairment in spatial Accuracy
They also couldn’t maintain the relationship between hand speed and curvature even when given all the contextual cues.
Could apraxics do any of the conditions of the bread slicing task ? When was their ability improved?
No they couldn’t do any showing that it can’t have disconnection hypothesis because it as the just the command verbal condition that they couldn’t do.
Performance improved very slightly when given the implements but not by much.
What age gender, age and cause of brain damage is patient MR?
71 year old female
Underwent an evacuation of a left intracerebral haematoma
