Week 5 Flashcards
Neuropsychological assessment considerations
Always assess a person’s emotional state in the intake interview and conduct a screen for mood symptoms (e.g., DASS)
Aim to assess optimal performance: Manage fatigue and alertness (session timing, length and breaks)
Motor problems and handedness (avoid tasks requiring eye-hand coordination with dominant hand [e.g., writing] to assess non-motor skills – e.g., attention)
Does the person have aphasia? – can still assess but need to rely more on nonverbal tasks to gauge IQ and higher order cognitive abilities (e.g., give measures of EF with minimal language requirements)
Neglect? Rely more on verbal tasks and avoid placing objects on their left side of space
Assessment considerations
Take into account the likely effects of underlying motor, perceptual and language impairments when interpreting results (do they really have problems with planning or did visual neglect or motor problems affect how well they completed a visuo-motor measure of planning?)
Are changes in the person’s functioning expected over time (recovery, decline)?
- -The person may need a re-assessment
- –Repeatable batteries with parallel forms help to avoid practice effects
- –E.g., Test of Everyday Attention
- –RBANS
Brain Injury Outcomes
A 2-5 year follow-up of people discharged from the PAH (n=208) in QLD identified that 47% returned to work in the same or different job (Fleming et al., 1999)
In a consecutive cohort study of 96 people with TBI Ownworth et al. (2011) found that 24% were in the clinical range for depression at hospital discharge, which increased slightly to 27% at 3-months post-discharge
Biopsychosocial Framework
Ownsworth (2014)
Pre-injury characteristics
Psychological factors
Neuropathology
Social environment
all influence -> Outcomes
Functional, social & emotional
BioPsychosocial Framework:
Pre-injury characteristics
Genotype, age, gender, ethnicity, occupation, cognitive & physical abilities
Psychological and social resources
BioPsychosocial Framework:
Psychological factors
Personal appraisals and reactions (personality, self-awareness, coping strategies, motivation and goals)
BioPsychosocial Framework:
Neuropathology
Cause & mechanisms
Severity, location, recurrence, onset/ course
Treatment options
Direct effects on functioning (e.g., aphasia)
BioPsychosocial Framework:
Psychological factors
Personal appraisals and reactions (personality, self-awareness, coping strategies, motivation and goals)
BioPsychosocial Framework:
Social environment
Concurrent stressors
Access to resources (physical, financial, information, social support) and rehabilitation
Early Notions on Recovery
Initial belief that the brain was ‘hard wired’
Implications for people with brain injury?
Later, recovery was thought to signify ‘spontaneous reorganisation’ of brain areas to take over the functions of damaged tissue
Middle ground: Day-to-day experiences can have measurable effects on brain structure and function (experience-dependent plasticity).
Recovery from TBI
Most rapid recovery occurs in first 3-6 months but may continue for many years
“..the adult brain can show large experience-dependent change in neural circuits, including dendritic and axonal sprouting” (Robertson, 1999, p. 412)
Research on Neuroplasticity
Neuroplasticity = brain’s ability to reorganise its structure, function and connections in response to life experiences
The lifelong capacity of the brain to change and rewire itself in response to learning and experience.
This assumes that there is a corresponding change in behaviour or function
Occurs in response to positive and adverse life experiences
Neuroplasticity
The adult brain has the potential for neuroplasticity through synaptogenesis (new synapses between neurons) and neurogenesis (new neurons)
Does neuroplasticity vary with age?
Animal experiment: young, adult and old mice placed in a complex environment vs standard lab cage
Mice of all ages found to have an increase in dendrite length and synapse density in neurons of the motor and sensory cortical regions relative to standard cage
Neuroplasticity in Humans
Timing of injury and brain maturation issues
Greatest evidence of neuroplasticity exists for motor and sensory function
Some preliminary evidence for language
Little evidence yet for cognitive and behavioural functions
Key Implications
Recovery: greatest benefits of rehabilitation are soon after injury to capitalize on optimal window of neuroplasticity
Maintenance and further gains: Participation in rehabilitation and meaningful activities are integral for ongoing experience-dependent recovery and can prevent atrophy and functional decline
A lack of activity and stimulation (e.g., ++support and dependence) or task avoidance may result in secondary functional impairments
Theories of Recovery & Adjustment
Robertson & Murre (1999) proposed two main processes of recovery:
- —Restitution – relearning or regaining skills to complete tasks the same as pre-injury
- —-Compensation – learning to perform tasks in a different way
Experience-dependent brain plasticity forms the basis for some of these changes
Process of Compensation Model (Dixon & Bäckman, 1999)
Compensation refers to a process through which deficits or losses are moderated
The need for compensation arises when there is a ‘mismatch’ between the skills a person possesses relative to the demands of the environment and expected performance
The general aim of compensation is to close the gap between expected performance, environmental demands and level of skill
Process of Compensation Model
In most cases it is important that individuals are aware of the mismatch between skills they possess, environmental demands and expected performance
Poor self-awareness is linked to reduced engagement in rehabilitation, unrealistic goals, lack of strategy use, failure to benefit from rehabilitation and poorer long-term outcomes (Ownsworth & Fleming, 2014)
A first step of rehabilitation can involve facilitating individual’s self-awareness of the need for compensation. For some individuals, motivation issues may also need to be addressed
Mechanisms of Compensation
Remediation – investing more
time and effort through training
and practice on a specific task
Substitution – using previously
developed skills or new skills
to take over the performance
of absent, lost or declining skills.
Self-adjustment – adjusting goals
and expectations of performance
to match environmental
demands to one’s skill level
External adjustment – modifying
& selecting environments &
adjusting expectations of others
Cognitive Rehabilitation
‘…can apply to any intervention strategy or technique which intends to enable clients or patients and their families to live with, manage, bypass, reduce, or come to terms with cognitive deficits precipitated by injury to the brain’ (Wilson, 1989, p.117).
Main Cognitive Impairments
Examples of approaches and techniques used for:
Attention Memory & learning Language Visuo-spatial skills Executive function
Attention
Create an environment conducive to good attending
Set realistic goals within the person’s capabilities and still challenging
Plan activities according to arousal level
Shorten activities and the gradually increase length of activities.
Frequent breaks on long tasks; alternate between physical & mental tasks
(some evidence for remedial, computerised training and attention process training/focus pocus/braintap sort of thing but domain specific)
Self-Check
STOP! Where is my attention focused right now? >>> Is this what I need to be focusing on? >>>> YES, good! stay on track
Is this what I need to be focusing on? NO, what should I be focusing on? >>>Do I need to take A short break?