Adrienne Epps

Rehabilitation of everyday memory deficits in paediatric brain injury: Self-instruction and diary training

Memory problems that interfere with everyday living are frequently reported in children who have sustained acquired brain injury (ABI), but their nature and rehabilitation is under-researched. This study aimed to (1) determine neuropsychological correlates of everyday memory deficits in children with ABI, and (2) investigate the effectiveness of a newly developed programme for their rehabilitation. We assessed everyday memory, verbal memory, attention and behaviour in 15 children with ABI. The children attended the everyday memory rehabilitation programme: six weekly sessions that involved diary training, self-instruction training and case examples. At the onset we found that everyday memory problems were related to impaired attention and behavioural difficulties. On completion of the programme there was a significant increase in childrens abilities to perform daily routines that demanded recall of information and events. In addition, children used diaries more frequently. Moreover, significant secondary gains were found in attention and mood (anxiety and depression). In conclusion, the results provided preliminary evidence that our six week programme could be effective in reducing everyday memory difficulties and improving psychological well-being in children with ABI.

Implicit and explicit memory outcome in children who have sustained severe traumatic brain injury: Impact of age at injury (preliminary findings)

Primary objective: To examine implicit and explicit memory outcome in children who had sustained severe traumatic brain injury (TBI) through childhood. Opposite patterns of impairments were expected: (i) impaired implicit memory in children with early TBI (TBI-EC, < 6 years) and (ii) impaired explicit memory in children with late TBI (TBI-LC, ≥ 6 years). Research design: Children who had sustained severe TBI more then 1 year ago were assessed. Methods and procedure: Fourteen children who had sustained severe TBI (TBI-EC, n = 10 and TBI-LC, n = 4) between 8 months and 13 years 7 months of age and 13 non-injured control subjects (NC) participated. Implicit (repetition priming and skill learning) and explicit verbal memory were examined. Results: The TBI group performed worse on implicit (repetition priming) and explicit memory tasks compared to the NC group. Moreover, impairments were found in implicit and explicit memory in the TBI-EC, but not in the TBI-LC group. Conclusions: This study has shown, for the first time, that severe childhood TBI may compromise not only explicit, but also implicit memory. Nevertheless, instead of a selective implicit memory impairment, it was found that children who sustained injuries in early childhood present with impairments in both memory systems.

Central nervous system stimulants for secondary attention deficit-hyperactivity disorder after paediatric traumatic brain injury: a rationale and protocol for single patient (n-of-1) multiple cross-over trials

BackgroundIt is estimated that 22,800 children were living with an Acquired Brain Injury (ABI) (0.6% of children aged under 15 years) in Australia during 2003. Many children after a traumatic brain injury will experience difficulties with attention and concentration; a condition termed secondary Attention Deficit-Hyperactivity Disorder. There is conflicting evidence on whether treatment with stimulant therapy with medications such as methylphenidate or dexamphetamine will improve the attention and behavior of children with this condition.Methods/DesignSingle patient trials (n-of-1s or SPTs) evaluate the effect of titrated doses of psychostimulants methylphenidate or dexamphetamine compared to placebo on attention and behavior, in children with TBI and secondary ADHD. The aggregation of multiple SPTs will produce a population estimate of the benefit. Forty-two children will be registered into the trial through rehabilitation services at three large children’s hospitals in Australia. Patients will complete up to 3 cycles of treatment. Each cycle is 2 weeks long comprising seven days each of treatment and placebo, with the first two days of each cycle considered a washout period and the data not analysed. The order of treatment and placebo is randomly allocated for each cycle. The Conners’ Parent Rating Scales long forms will be employed to measure change in attention-deficit/hyperactivity and related problems of the child, and the primary outcome measure is the Conners’ Global Index Parent Version. Secondary outcomes include the teacher and child (if aged > 12 years) Conners’ Rating Scales, the Behaviour Rating Inventory of Executive Function among other measures. This study will provide high-level evidence using a novel methodological approach to inform clinicians about the most appropriate treatment for individual children. Through aggregation of individual trials, a population estimate of treatment effect will be provided to guide clinical practice in the treatment of children with secondary ADHD after a traumatic brain injury.DiscussionThis study employs an innovative methodological approach on the effectiveness of CNS stimulants for secondary ADHD from a brain injury. The findings will both guide clinicians on treatment recommendations, and inform the concept and acceptance of SPTs in paediatric research.Trial registrationAustralian New Zealand Clinical Trials Registry. ACTRN12609000873224

PTA scale for children aged 4 to 7 years: Selecting developmentally valid and reliable items

ABSTRACT The aim of this study was to select developmentally valid and reliable items for inclusion in criterion-referenced (pass > 90%) posttraumatic amnesia (PTA) scale for children aged 4 to 7 years in a prospective cohort study. Fifty-two typically developing children (26 male/26 female) aged 4 to 7 years were administered a set of 10 items (5 orientation, 5 memory) over 3–4 days. The total score obtained on the set of 10 items had poor developmental validity and test–retest reliability. Nevertheless, individual item analysis identified five items (three orientation and two memory items) that were consistently passed by >90% of the children on each day of testing. For these five items the total scores did not differ significantly either between age groups or between days of testing. Test–retest was extremely high (close to 1). The five items had excellent developmental validity and test–retest reliability. This study identified 5 (3 orientation and 2 memory) items that met our selection criterion and form a new PTA scale, the Sydney PTA scale (SYPTAS), for children aged 4 to 7 years.

Natural sequence of recovery from child post-traumatic amnesia: a retrospective cohort study

The aim of this study was to determine the sequence of skills recovery during post-traumatic amnesia (PTA) in children with moderate to severe traumatic brain injuries (TBIs). Setting: Fifty children aged 8 to 15 years consecutively admitted to a children’s hospital with TBI and PTA>24 were tested in a retrospective cohort study where the main measure was the Westmead PTA Scale (WPTAS). The group analyses show that orientation to time took longer to recover than orientation to person and place, but not memory, while the individual analyses revealed that when orientation to time was grouped with memory, 94% of children recovered orientation to person and place before orientation to time and memory (examiner and pictures). Correlation coefficients between age and the number of days taken to recover skills were not found to be significant. It was established that, in terms of the natural sequence of skills recovery in children aged 8 to 15 years following moderate to severe TBI, recovery of orientation to time is more closely aligned to memory than to orientation to person and place. It was also established that WPTAS items are developmentally appropriate for children aged 8 to 15 years who have sustained TBI. These findings are clinically important because monitoring recovery from PTA both impacts the rehabilitation offered to individuals during acute care and aids discharge planning.

Time-based prospective memory in children and adolescents with traumatic brain injury: Impact of working memory demands.

Objective: Difficulties with prospective memory are frequently reported following pediatric traumatic brain injury (TBI), but rarely researched. We aimed to (i) investigate time-based prospective memory post-pediatric TBI; (ii) examine whether time-based prospective memory is differentially impacted by the demand placed on working memory; and (iii) explore which components of working memory (viz., central executive, phonological loop, and visuospatial sketchpad) are involved in time-based prospective memory under low and high cognitive load following pediatric TBI. Method: Thirty-nine children and adolescents (20 survivors of moderate–severe TBI and 19 healthy controls) completed (i) a newly developed time-based prospective memory task (TBPMT), embedded in an ongoing lexical-decision task, with two conditions: low and high working memory load; and (ii) tests of working memory components from the Automated Working Memory Assessment. Results: Compared to controls, participants with TBI had significantly lower prospective memory accuracy on the TBPMT across working memory loads (low, high). In contrast, the groups did not differ in time monitoring or accuracy on the ongoing task. In the TBI group, higher scores on tests of the central executive (but not phonological loop or visuospatial sketchpad) were associated with higher prospective memory accuracy and time monitoring (controlling for age). Conclusions: Time-based prospective memory is impaired following moderate–severe pediatric TBI, irrespective of the level of working memory demand. Our findings suggest that children and adolescents with TBI may be at risk of failing to perform future intentions at the right time in daily life, especially for individuals identified as having deficits in central executive functioning.

Preliminary validation study of the Sydney Post-Traumatic Amnesia Scale (SYPTAS) in children with traumatic brain injury aged 4 to 7 years

ABSTRACT The aim of this study was to assess the validity (developmental, concurrent, and predictive) of the Sydney Post-Traumatic Amnesia Scale (SYPTAS) for assessment of post-traumatic amnesia (PTA) in 4 to 7 year old children with traumatic brain injury (TBI). The design of this study is a retrospective cohort study. The SYPTAS was administered to 35 children (26 boys) aged 4.0 to 7.8 years who were consecutively admitted to a children’s hospital with mild (n = 26), moderate (n = 3), or severe (n = 7) TBI. Concurrent validity of the SYPTAS was assessed against the Glasgow Coma Scale Scores (GCS). Predictive validity of the SYPTAS for functional outcomes was evaluated against the King’s Outcome Scale for Childhood Head Injury (KOSCHI) at discharge and outpatient follow-ups. The length of PTA, measured by the SYPTAS, was invariant of children’s chronological age, confirming the scale’s developmental validity. Longer PTA was associated with lower GCS, endorsing concurrent validity of PTA duration measured by the SYPTAS, as a clinical indicator of TBI severity. PTA duration measured by the SYPTAS was a significant predictor of functional outcomes on the KOSCHI at discharge and follow-ups. This study provides evidence that the SYPTAS has good developmental, concurrent and predictive validity for assessment of PTA in children aged 4 to 7 years. PTA duration assessed by the SYPTAS is a clinical indicator of TBI severity and can aid rehabilitation planning post TBI.