Publications by authors named "Katherine Smulligan"

Objective: To evaluate if peer relationship ratings differ among adolescents who sustain a sport-related concussion compared to those who sustain a non-sport-related concussion.

Study Design: We conducted a cross-sectional investigation of 123 adolescents who sustained a concussion within 21 days before their initial post-injury evaluation (mean = 9.2 ± 3.

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Background: Poor sleep is associated with longer recovery following adolescent concussion, making the longitudinal assessment of sleep important for monitoring recovery and identifying sleep disruptions. An important consideration for successful monitoring of sleep following concussion is the feasibility and adherence of a given sleep monitoring tool when used in an at-home environment. Understanding the usability of different sleep monitoring tools is essential for determining their applicability for longitudinal assessment in an ecologically valid environment.

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Purpose: To examine associations between clinical measures (self-reported and clinician-administered) and subsequent injury rates in the year after concussion return to play (RTP) among adolescent athletes.

Methods: We performed a prospective, longitudinal study of adolescents ages 13-18 years. Each participant was initially assessed within 21 days of concussion and again within 5 days of receiving RTP clearance from their physician.

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Article Synopsis
  • Evidence suggests that returning to play after a concussion increases the risk of musculoskeletal injuries due to undetected neuromuscular control deficits, highlighting the potential benefits of rehabilitation programs.
  • A feasibility trial tested an 8-week virtual neuromuscular training (NMT) program via a smartphone app, where participants completed three self-guided workouts per week incorporating various exercises.
  • Out of 20 enrolled participants, 15 completed the program with a retention rate of 75%, and adherence was moderate at 57.2%, with time constraints reported as a significant barrier to completion.
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Objective: To investigate dizziness, vestibular/oculomotor symptoms, and cervical spine proprioception among adults with/without a concussion history.

Methods: Adults ages 18-40 years with/without a concussion history completed: dizziness handicap inventory (DHI), visio-vestibular exam (VVE), and head repositioning accuracy (HRA, assesses cervical spine proprioception). Linear regression models were used to assess relationships between (1) concussion/no concussion history group and VVE, HRA, and DHI, and (2) DHI with HRA and VVE for the concussion history group.

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Context/objective: There is a growing global interest in quantifying spinal cord lesions and spared neural tissue using magnetic resonance imaging (MRI) in individuals with spinal cord injury (SCI). The primary objective of this study was to assess the relationships between spinal cord lesion characteristics assessed on MRI and bowel, bladder, and overall independence following SCI.

Design: Retrospective, exploratory study.

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Objective: Cervical spine proprioception may be impaired after concussion. Our objective was to determine the diagnostic utility of cervical spine proprioception for adolescent concussion.

Design: Cross-sectional.

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Objective: We examined post-concussion symptom presentation, exercise, and sleep among pediatric athletes who sustained concussion during the school year vs. summer months.

Methods: We evaluated athletes 6-18 years old within 21-days of concussion.

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Purpose: This study aimed to examine how moderate-to-vigorous physical activity (MVPA) during concussion recovery influences self-reported anxiety symptoms at follow-up assessment. We hypothesized that more MVPA after concussion would be associated with lower anxiety rating at follow-up.

Methods: We performed a prospective study of participants aged 13-18 yr initially assessed within 14 d of diagnosed concussion.

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Objective: To examine whether a high volume of aerobic exercise after concussion (>150 min/wk) is associated with improved sleep quality over a 1-month period. We hypothesized that more than 150 min/wk of exercise would be associated with improved sleep quality across concussion recovery.

Design: Prospective cohort observational study.

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Background: The timing of clinical evaluation after pediatric concussion represents an important and potentially modifiable clinical milestone for diagnosis, selection of appropriate treatment pathways, and recovery prognosis. Patient demographics, socioeconomic status, or medical history may affect the time to the initial evaluation and subsequently influence recovery outcomes.

Purpose/hypothesis: The purpose of this investigation was to evaluate the association of patient characteristics with the time to specialty evaluation after a concussion.

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Context: Early physical activity (PA) after concussion may promote symptom resolution. Prior studies have investigated exercise frequency/duration, yet precise PA intensity or volume required for optimal recovery requires further investigation. moderate to vigorous physical activity (MVPA) is beneficial for physical health.

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We examined the association of self-reported sleep problems with clinical measures of postural stability, memory performance, symptom burden, and symptom duration following youth concussion. Patients 6-18 years of age presenting ≤21 days postconcussion underwent a clinical evaluation including modified Balance Error Scoring System, single- and dual-task tandem gait, immediate and delayed recall, and symptom severity. We calculated time from injury until symptom resolution and determined the proportion of patients who developed persistent postconcussion symptoms, defined as a symptom duration >28 days postconcussion.

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Objectives: To assess the association between early physical activity and post-concussion sleep quality, dizziness, and postural stability among adolescents with concussion compared to uninjured controls.

Design: Cross-sectional.

Methods: Adolescents ages 13-18 years assessed within 14 days post-concussion and uninjured controls.

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Context: Reaction time (RT) is a critical element of return to participation (RTP), and impairments have been linked to subsequent injury after a concussion. Current RT assessments have limitations in clinical feasibility and in the identification of subtle deficits after concussion symptom resolution.

Objectives: To examine the utility of RT measurements (clinical drop stick, simple stimulus-response, single-task Stroop, and dual-task Stroop) to differentiate between adolescents with concussion and uninjured control individuals at initial assessment and RTP.

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Background: Both sleep duration and physical activity following concussion may influence subsequent recovery. Objective measurement of sleep and physical activity behavior via wearable technology may provide insights into their association with concussion recovery.

Objective: To determine whether sleep behavior (eg, duration, timing) and/or physical activity (steps/day, or exercise frequency, duration, intensity) in the first month after adolescent sports-related concussion are associated with developing persisting postconcussion symptoms (PPCS).

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Objective: To determine the association between academic time loss postconcussion and vision symptoms/impairments among pediatric patients.

Design: Cross-sectional.

Setting: Sports medicine clinic.

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Objective: To examine the association between dizziness and neck/shoulder pain after concussion and if differences in postural stability and oculomotor function exist among patients reporting dizziness with or without concurrent neck/shoulder pain.

Design: Cross sectional.

Setting: Sports medicine clinic.

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Context: The relationship between physical activity (PA) and fear of pain with movement (ie, kinesiophobia) during concussion recovery is unknown. Kinesiophobia may limit PA, while PA after concussion may reduce kinesiophobia. Our purpose was to examine the correlation between PA and self-reported kinesiophobia during concussion recovery for adolescents with and without persistent symptoms.

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Objectives: To examine the utility of a multimodal assessment battery of self-reported dizziness, clinician obtained postural stability, and symptom severity ratings within 14 days of concussion to predict symptom resolution time among children and adolescents.

Design: Prospective cohort.

Methods: Patients ages 6-18 years completed evaluation ≤14 days post-concussion, including self-reported symptom severity using the Post-Concussion Symptom Inventory (PCSI) and postural stability assessments.

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Purpose: Physical activity (PA) after concussion is an important aspect of appropriate clinical management. However, symptoms or functional deficits may reduce patient propensity toward PA, thereby negatively affecting recovery. Our purpose was to examine whether postconcussion dizziness, total symptom severity, or postural stability predicts PA level in the 2 wk after initial evaluation.

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Context: Dizziness, postural instability, and poor sleep quality are all commonly reported post-concussion and individually relate to poor outcomes.

Objective: To examine sleep quality and postural stability among adolescents who did and did not report dizziness within two weeks of concussion.

Design: Cross-sectional study.

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Background: Dizziness and gait impairments are commonly observed following a concussion, and both are associated with prolonged concussion recovery.

Research Question: Is there a correlation between combined self-reported dizziness and balance impairment severity with objective gait impairments after concussion?

Methods: Participants (n = 51; 15.4 ± 1.

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Objective: Recent research supports initiating physical activity as soon as 24 to 48 hours after concussion to reduce persistent postconcussive symptoms. However, this practice has not been widely adopted. The objective of this study was to evaluate the association of early physical activity with patient-reported and functional outcomes for pediatric patients following a concussion.

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