Amy J. Jak
Veterans Health Administration
PsychiatryInternal medicineCognitive skillNeuropsychologyPsychologyTwin studyNeuroscienceCognitionDepression (differential diagnoses)DiseaseDementiaTraumatic brain injuryPopulationCognitive declineCognitive impairmentPoison controlAudiologyApolipoprotein ENeuroimagingCognitive rehabilitation therapyClinical psychologyMedicine
156Publications
38H-index
4,443Citations
Publications 152
Newest
#1Molly J. Sullan (UCSD: University of California, San Diego)H-Index: 1
Abstract null null Poor sleep quality is common among Veterans with posttraumatic stress disorder (PTSD) and history of traumatic brain injury (TBI). However, the relationship between sleep quality and treatment outcomes following trauma-focused interventions is less well-understood in this population. We sought to better understand whether 1) sleep quality changed as a result of trauma-focused treatment and 2) if baseline sleep quality moderated psychological and neurobehavioral treatment outco...
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#1McKenna S. Sakamoto (Veterans Health Administration)H-Index: 1
#2Victoria C. Merritt (Veterans Health Administration)H-Index: 13
Last. Amy J. Jak (Veterans Health Administration)H-Index: 38
view all 9 authors...
OBJECTIVE To examine self-efficacy and coping style in combat-exposed Veterans with and without mild traumatic brain injury (mTBI) history and posttraumatic stress disorder (PTSD). METHODS Veterans (N = 81) were categorized into four groups: comorbid mTBI and PTSD (n = 23), PTSD-only (n = 16), mTBI-only (n = 25), and combat-exposed controls (n = 17). Outcomes included the Self-Efficacy for Symptom Management Scale and the Brief Coping Orientation to Problems Experienced. RESULTS Significant grou...
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#1Katherine J. BangenH-Index: 29
#2Lisa Delano-Wood (UCSD: University of California, San Diego)H-Index: 32
Last. Melissa Lamar (Rush University Medical Center)H-Index: 30
view all 13 authors...
Alterations to cerebral white matter tracts have been associated with cognitive decline in aging and Alzheimer's disease (AD). In particular, the fornix has been implicated as especially vulnerable given that it represents the primary outflow tract of the hippocampus. Despite this, little work has focused on the fornix using a potential early marker of white matter degeneration-myelin water fraction (MWF; an in vivo marker of myelin content). Therefore, we sought to (1) clarify associations betw...
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#1Maya Elin O'Neil (CCC: Cameron International)
#2David Cameron (OHSU: Oregon Health & Science University)H-Index: 5
Last. Marilyn HuckansH-Index: 22
view all 12 authors...
Objective To examine associations among compensatory cognitive training (CCT), objective cognitive functioning, and self-reported cognitive symptoms. We examined whether change in objective cognitive functioning associated with participation in CCT at 10-week follow-up mediates change in self-reported cognitive symptoms associated with CCT at 15-week follow-up. Setting Three VA outpatient mental health clinics. Participants Veterans with a history of mild traumatic brain injury who reported cogn...
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#1Scott F. Sorg (UCSD: University of California, San Diego)H-Index: 16
#2Madeleine L. Werhane (UCSD: University of California, San Diego)H-Index: 9
Last. Lisa Delano-WoodH-Index: 32
view all 9 authors...
OBJECTIVE The evaluation of memory complaints in mild traumatic brain injury (mTBI) remains an important clinical consideration, especially in the context of comorbid psychiatric symptoms such as posttraumatic stress disorder (PTSD). We compared subjective memory complaints in veterans with and without a history of mTBI, examined ratings between those with single versus multiple mTBIs, and investigated associations between memory complaints and PTSD symptom severity. METHODS 117 outpatient veter...
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#1Jeremy A. Elman (UCSD: University of California, San Diego)H-Index: 15
#2Olivia K. Puckett (UCSD: University of California, San Diego)H-Index: 1
Last. William S. Kremen (UCSD: University of California, San Diego)H-Index: 70
view all 30 authors...
INTRODUCTION The locus coeruleus (LC) undergoes extensive neurodegeneration in early Alzheimer's disease (AD). The LC is implicated in regulating the sleep-wake cycle, modulating cognitive function, and AD progression. METHODS Participants were 481 men (ages 62 to 71.7) from the Vietnam Era Twin Study of Aging. LC structural integrity was indexed by neuromelanin-sensitive magnetic resonance imaging (MRI) contrast-to-noise ratio (LCCNR ). We examined LCCNR , cognition, amnestic mild cognitive imp...
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OBJECTIVE The investigators sought to evaluate the independent and interactive associations between mild traumatic brain injury (mTBI) characteristics and posttraumatic stress disorder (PTSD) symptoms with regard to postconcussive symptoms and cognition among treatment-seeking veterans of the U.S. conflicts in Iraq and Afghanistan. METHODS Sixty-seven Iraq and Afghanistan veterans who had a history of mTBI and comorbid PTSD were grouped based on injury mechanism (blast versus nonblast) and numbe...
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#1Hillary L Ditmars (BU: Boston University)H-Index: 1
#2Mark W. Logue (BU: Boston University)H-Index: 33
Last. Michael J. Lyons (BU: Boston University)H-Index: 85
view all 27 authors...
Background Clarifying the relationship between depression symptoms and cardiometabolic and related health could clarify risk factors and treatment targets. The objective of this study was to assess whether depression symptoms in midlife are associated with the subsequent onset of cardiometabolic health problems. Methods The study sample comprised 787 male twin veterans with polygenic risk score data who participated in the Harvard Twin Study of Substance Abuse ('baseline') and the longitudinal V...
1 CitationsSource
OBJECTIVE The purpose of this study was to determine modifiable predictors of intervention adherence in a study of group-based Compensatory Cognitive Training (CCT) for Iraq/Afghanistan War veterans with a history of mild traumatic brain injury (mTBI). METHODS One hundred twenty-three veterans enrolled in a randomized controlled trial of a 10-week CCT intervention (54 assigned to CCT) and were evaluated at baseline, 5 weeks, 10 weeks, and 15 weeks. CCT adherence was determined by the number of C...
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#1Graham M.L. Eglit (UCSD: University of California, San Diego)H-Index: 7
#2Jeremy A. Elman (UCSD: University of California, San Diego)H-Index: 15
Last. William S. KremenH-Index: 70
view all 26 authors...
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