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Examining Neural and Cognitive Aging Following Traumatic Brain Injury Among Middle and Older Adults
Examining Neural and Cognitive Aging Following Traumatic Brain Injury Among Middle and Old...
Examining Neural and Cognitive Aging Following Traumatic Brain Injury Among Middle and Older Adults

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자료유형  
 학위논문 서양
최종처리일시  
20260202105634
ISBN  
9798297962453
DDC  
616
저자명  
Moody, Jena Nicole.
서명/저자  
Examining Neural and Cognitive Aging Following Traumatic Brain Injury Among Middle and Older Adults
발행사항  
[Sl] : The Ohio State University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
201 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Hayes, Jasmeet P.
학위논문주기  
Thesis (Ph.D.)--The Ohio State University, 2025.
초록/해제  
요약Aging is characterized by pervasive decline of white matter and cognition. However, this decline is highly variable, and many studies identify traumatic brain injury (TBI) as a risk factor for accelerated neural and cognitive aging. It is often thought that TBI may accelerate cognitive decline by exacerbating age-related decline of white matter integrity. However, previous research has largely examined white matter integrity using analyses that assume spatial homogeneity of white matter disruptions. The purpose of study 1 was to examine how TBI may impact white matter throughout the aging process by examining the independent effects of TBI and interactions between TBI and age. The purpose of study 2 was to examine how TBI may impact cognitive aging by examining the independent effects of TBI and interactions between TBI and white matter integrity. Participants in study 1 included 118 middle and older adults ranging in age from 40-86 years old with demographic, TBI, and neuroimaging data collected as part of the Fitness, Aging, Stress, and TBI Repository (FASTER); two of these individuals were missing cognitive data and were excluded from study 2. Lifetime TBI history was assessed with the Boston Assessment of Traumatic Brain Injury - Lifetime (BAT-L). There were 44 participants with a history of TBI, 36 of whom had a mild TBI while 8 had a moderate/severe TBI. Diffusion weighted imaging scans were collected and analyzed with a voxel-wise, cluster-based approach, which is sensitive to heterogenous white matter abnormalities, to quantify number of fractional anisotropy (FA) and mean diffusivity (MD) potholes. Episodic memory and executive functioning composite scores were computed from a battery of neuropsychological tests. In study 1, hierarchical linear regressions were implemented to examine the effects of TBI and age on white matter integrity adjusting for sex and education. In study 2, hierarchical linear regressions were implemented to examine the effects of TBI and white matter integrity on episodic memory and executive functioning, adjusting for age, sex, and education. Results showed there were no independent effects of TBI or interactions between TBI and age on white matter potholes throughout the brain, however a history of TBI was associated with more FA potholes in the fornix. There were also no independent effects of TBI or interactions between TBI and white matter potholes on episodic memory or executive functioning. There was, however, a significant effect of age on white matter potholes throughout the brain, measured via both FA and MD, episodic memory, and executive functioning, indicating decreased white matter integrity and cognition at older ages. Lastly, findings showed that males had more FA potholes than females and females had higher episodic memory performance than males, but there were no sex differences in terms of MD potholes or executive functioning. Overall, these results show decreased white matter and cognition throughout the aging process. Further, findings show that TBI may have regionally specific effects, particularly in the fornix, but there were no chronic whole-brain or cognitive consequences. Future research should consider the role of other risk and protective factors to understand who may be most susceptible to negative outcomes following TBI and throughout the aging process.
일반주제명  
Neurosciences
일반주제명  
Aging
일반주제명  
Health sciences
일반주제명  
Clinical psychology
일반주제명  
Cognitive psychology
키워드  
Traumatic brain injury
키워드  
White matter microstructure
키워드  
Cognition
기타저자  
The Ohio State University Psychology
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aMoody,  Jena  Nicole.
■24510▼aExamining  Neural  and  Cognitive  Aging  Following  Traumatic  Brain  Injury  Among  Middle  and  Older  Adults
■260    ▼a[Sl]▼bThe  Ohio  State  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a201  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Hayes,  Jasmeet  P.
■5021  ▼aThesis  (Ph.D.)--The  Ohio  State  University,  2025.
■520    ▼aAging  is  characterized  by  pervasive  decline  of  white  matter  and  cognition.  However,  this  decline  is  highly  variable,  and  many  studies  identify  traumatic  brain  injury  (TBI)  as  a  risk  factor  for  accelerated  neural  and  cognitive  aging.  It  is  often  thought  that  TBI  may  accelerate  cognitive  decline  by  exacerbating  age-related  decline  of  white  matter  integrity.  However,  previous  research  has  largely  examined  white  matter  integrity  using  analyses  that  assume  spatial  homogeneity  of  white  matter  disruptions.  The  purpose  of  study  1  was  to  examine  how  TBI  may  impact  white  matter  throughout  the  aging  process  by  examining  the  independent  effects  of  TBI  and  interactions  between  TBI  and  age.  The  purpose  of  study  2  was  to  examine  how  TBI  may  impact  cognitive  aging  by  examining  the  independent  effects  of  TBI  and  interactions  between  TBI  and  white  matter  integrity.  Participants  in  study  1  included  118  middle  and  older  adults  ranging  in  age  from  40-86  years  old  with  demographic,  TBI,  and  neuroimaging  data  collected  as  part  of  the  Fitness,  Aging,  Stress,  and  TBI  Repository  (FASTER);  two  of  these  individuals  were  missing  cognitive  data  and  were  excluded  from  study  2.  Lifetime  TBI  history  was  assessed  with  the  Boston  Assessment  of  Traumatic  Brain  Injury  -  Lifetime  (BAT-L).  There  were  44  participants  with  a  history  of  TBI,  36  of  whom  had  a  mild  TBI  while  8  had  a  moderate/severe  TBI.  Diffusion  weighted  imaging  scans  were  collected  and  analyzed  with  a  voxel-wise,  cluster-based  approach,  which  is  sensitive  to  heterogenous  white  matter  abnormalities,  to  quantify  number  of  fractional  anisotropy  (FA)  and  mean  diffusivity  (MD)  potholes.  Episodic  memory  and  executive  functioning  composite  scores  were  computed  from  a  battery  of  neuropsychological  tests.  In  study  1,  hierarchical  linear  regressions  were  implemented  to  examine  the  effects  of  TBI  and  age  on  white  matter  integrity  adjusting  for  sex  and  education.  In  study  2,  hierarchical  linear  regressions  were  implemented  to  examine  the  effects  of  TBI  and  white  matter  integrity  on  episodic  memory  and  executive  functioning,  adjusting  for  age,  sex,  and  education.  Results  showed  there  were  no  independent  effects  of  TBI  or  interactions  between  TBI  and  age  on  white  matter  potholes  throughout  the  brain,  however  a  history  of  TBI  was  associated  with  more  FA  potholes  in  the  fornix.  There  were  also  no  independent  effects  of  TBI  or  interactions  between  TBI  and  white  matter  potholes  on  episodic  memory  or  executive  functioning.  There  was,  however,  a  significant  effect  of  age  on  white  matter  potholes  throughout  the  brain,  measured  via  both  FA  and  MD,  episodic  memory,  and  executive  functioning,  indicating  decreased  white  matter  integrity  and  cognition  at  older  ages.  Lastly,  findings  showed  that  males  had  more  FA  potholes  than  females  and  females  had  higher  episodic  memory  performance  than  males,  but  there  were  no  sex  differences  in  terms  of  MD  potholes  or  executive  functioning.  Overall,  these  results  show  decreased  white  matter  and  cognition  throughout  the  aging  process.  Further,  findings  show  that  TBI  may  have  regionally  specific  effects,  particularly  in  the  fornix,  but  there  were  no  chronic  whole-brain  or  cognitive  consequences.  Future  research  should  consider  the  role  of  other  risk  and  protective  factors  to  understand  who  may  be  most  susceptible  to  negative  outcomes  following  TBI  and  throughout  the  aging  process.
■590    ▼aSchool  code:  0168.
■650  4▼aNeurosciences
■650  4▼aAging
■650  4▼aHealth  sciences
■650  4▼aClinical  psychology
■650  4▼aCognitive  psychology
■653    ▼aTraumatic  brain  injury
■653    ▼aWhite  matter  microstructure
■653    ▼aCognition
■690    ▼a0622
■690    ▼a0317
■690    ▼a0566
■690    ▼a0493
■690    ▼a0633
■71020▼aThe  Ohio  State  University▼bPsychology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0168
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360895▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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