Publications by authors named "Brandon Vasquez"

Background: Errorless learning is an intervention technique used in acquired brain injury (ABI) rehabilitation. To support the use of this intervention within occupational therapy practice, it is important to know how errorless learning has been applied to (re)train daily functions.

Objectives: To describe the empirical literature on errorless learning applied to everyday functioning in adults with ABI.

View Article and Find Full Text PDF
Article Synopsis
  • Attentional engagement is crucial for cognitive rehab, specifically in mobile app skill learning, but its relation to skill acquisition over time is not well understood.
  • The study hypothesized that patients with better functional capacity would learn faster and experience a decline in attentional engagement, whereas those with lower capacity would need to maintain attentional focus to progress.
  • Findings revealed that fast learners showed a decrease in engagement as they learned, while slow learners maintained high engagement levels but progressed more slowly, indicating more cognitive effort needed for those with greater impairments.
View Article and Find Full Text PDF

Functional memory impairment following acquired brain injury can lead to decreased independence. External memory aids such as smartphones can be highly effective compensation tools, but cognitive deficits may create barriers to implementation in daily life. The present study examined predictors of real-world use of mobile calendar applications for memory compensation in an acquired brain injury sample.

View Article and Find Full Text PDF

Objective: Severe acute respiratory syndrome (SARS) is a highly contagious viral respiratory illness associated with hypoxia and dyspnea. Many of those who contracted and recovered from SARS during the 2002-2003 outbreak reported persistent physical, psychological, and cognitive difficulties. Here, we investigated the residual influences of SARS on cognition for a subset of healthcare professionals who recovered and were referred for neuropsychological evaluation through their workplace insurance.

View Article and Find Full Text PDF

Objectives: Amnestic mild cognitive impairment (aMCI), a prodromal stage of Alzheimer's disease and other dementias, is characterized by episodic memory impairment. Recent evidence has shown inhibitory control deficits in aMCI, but the extent of these deficits across inhibitory domains (i.e.

View Article and Find Full Text PDF

Memory impairment is a common consequence of acquired brain injury, often leading to functional difficulties day-to-day and decreased independence. Memory Link is a theory-driven training programme for individuals with moderate-to-severe memory dysfunction, which enables the acquisition of digital device skills for functional compensation. The present study examined how neuropsychological functioning and initial training performance contribute to training duration in our outpatient memory rehabilitation programme.

View Article and Find Full Text PDF

Amnestic mild cognitive impairment (aMCI) is a prodromal stage of Alzheimer's disease that is characterized by impairments in episodic memory. Recent evidence has shown that inhibitory control is also impaired in aMCI. The aim of the present meta-analysis was to quantify inhibitory control ability in individuals with aMCI by examining performance across a range of well-defined inhibition paradigms that tapped into one of three inhibitory control subtypes (i) interference control (e.

View Article and Find Full Text PDF

To identify novel targets for neurorehabilitation of people with a remote history of multiple concussions by: (1) comprehensively characterizing neuropsychiatric and cognitive functioning in former professional football players, with a focus on executive functions; (2) distinguishing concussion-related findings from pre-morbid/cohort characteristics of professional football players; and, (3) exploring the relationship between executive functions and neuropsychiatric symptoms. Sixty-one high-functioning former professional football players and 31 age- and sex-matched control participants without history of concussion or participation in contact sports. Between-groups analyses.

View Article and Find Full Text PDF

Previous studies on response time intraindividual variability (RT IIV) have focused on differences between groups, ignoring the potential for modification. The current study provides a detailed analysis of RT IIV training effects across three age groups. Healthy adults (40 young [aged 18-30], 40 young-old [aged 65-74], and 41 old-old [aged 75-85]) were assigned to feedback or no feedback (standard) conditions during a touch-screen feature integration task.

View Article and Find Full Text PDF

Background: Executive control deficits are deleterious and enduring consequences of moderate-severe traumatic brain injury (TBI) that disrupt everyday functioning. Clinically, such impairments can manifest as behavioural inconsistency, measurable experimentally by the degree of variability across trials of a reaction time (RT) task (also known as intraindividual variability [IIV]). Growing research on cognition after TBI points to cognitive deterioration in the chronic stages postinjury.

View Article and Find Full Text PDF

Objectives: Intraindividual variability increases with age, but the relative strength of association with cognitive domains is still unclear. The objective of this study was to examine the relation between cognitive domains and the shape and spread of response time (RT) distributions as indexed by intraindividual standard deviation (ISD), and ex-Gaussian parameters (μ, σ, τ).

Methods: Healthy adults (40 young [aged 18-30 years], 40 young-old [aged 65-74 years], and 41 old-old [aged 75-85 years]) completed neuropsychological testing and a touch-screen attention task from which ISD and ex-Gaussian parameters were derived.

View Article and Find Full Text PDF

Objective: Little is known about the relationship of executive functioning with age-related increases in response time (RT) distribution indices (intraindividual standard deviation [ISD], and ex-Gaussian parameters mu, sigma, tau). The goals of this study were to (a) replicate findings of age-related changes in response time distribution indices during an engaging touch-screen RT task and (b) investigate age-related changes in the relationship between executive functioning and RT distribution indices.

Method: Healthy adults (24 young [aged 18-30], 24 young-old [aged 65-74], and 24 old-old [aged 75-85]) completed a touch-screen attention task and a battery of neuropsychological tests.

View Article and Find Full Text PDF

Previous studies have observed poorer working memory performance in individuals with amnestic mild cognitive impairment than in healthy older adults. It is unclear, however, whether these difficulties are true only of the multiple-domain clinical subtype in whom poorer executive functioning is common. The current study examined working memory, as measured by the self-ordered pointing task (SOPT) and an n-back task, in healthy older adults and adults with single-domain amnestic mild cognitive impairment (aMCI).

View Article and Find Full Text PDF

The most common cause of vascular cognitive impairment not demented (VCIND) is cerebral small vessel disease leading to diffuse subcortical white matter lesions. While many studies indicate that the core cognitive features of VCIND are executive dysfunction and impaired processing speed, this finding is not always consistent, and may be partially dependent on the comparison group applied. Hence, we undertook two systematic meta-analytic reviews on neuropsychological test performance across eight cognitive domains: between VCIND and healthy controls (data from 27 studies), and between VCIND and non-vascular mild cognitive impairment (nv-MCI; data from 20 studies).

View Article and Find Full Text PDF
Article Synopsis
  • Early identification of hemispatial neglect in acute stroke patients is crucial for nursing care, family support, and planning interventions, even though its early treatment outcomes remain unclear.
  • Previous assessments often miss mild neglect or are too time-consuming for bedside use.
  • The Sunnybrook Neglect Assessment Procedure (SNAP) was validated on 224 stroke patients and found to be a reliable and efficient tool for detecting neglect in acute settings.
View Article and Find Full Text PDF

The superior parietal cortex is critical for the control of visually guided actions. Research suggests that visual stimuli relevant to actions are preferentially processed when they are in peripersonal space. One recent study demonstrated that visually guided movements towards the body were more impaired in a patient with damage to superior parietal cortex.

View Article and Find Full Text PDF

Patients with Alzheimer's disease (AD) display a multiplicity of cognitive deficits in domains such as memory, language, and attention, all of which can be clearly linked to the underlying neuropathological alterations. The typical degenerative changes occur early on in the disease in the temporal-parietal lobes, with other brain regions, such as the frontal cortex, becoming more affected as the disease progresses. In light of the importance of the parietal cortex in mediating visuospatial attentional processing, in the present study, we investigated a deficit in covert orienting of visual attention and its relationship to cortical hypoperfusion in AD.

View Article and Find Full Text PDF

Right parietal lesions often lead to neglect, in which patients fail to attend to leftward stimuli. Recent models of neglect suggest that, in addition to attentional impairments, patients demonstrate impairments of spatial remapping and/or spatial working memory (SWM). Although spatial remapping could be considered a kind of spatial memory process itself (i.

View Article and Find Full Text PDF