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Pathophysiological Changes Within the Central Auditory System Following Mild Traumatic Brain Injury- [electronic resource]
Pathophysiological Changes Within the Central Auditory System Following Mild Traumatic Brain Injury- [electronic resource]

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자료유형  
 학위논문
Control Number  
0016932775
International Standard Book Number  
9798379840372
Dewey Decimal Classification Number  
574
Main Entry-Personal Name  
Fernandez, Joseph Mario.
Publication, Distribution, etc. (Imprint  
[S.l.] : Purdue University., 2022
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2022
Physical Description  
1 online resource(229 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
General Note  
Advisor: Shi, Riyi.
Dissertation Note  
Thesis (Ph.D.)--Purdue University, 2022.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약Traumatic Brain Injury (TBI) is one of the most prevalent causes of injury in young adults, and is a leading cause of hospitalization, disability, and even death. Although severe TBI can lead to serious acute injury (such as brain hemorrhaging and skull fractures) and chronic disability, the vast majority (~80%) of TBIs are mild in nature, and do not present with such drastic symptoms. As such, these mild TBIs may go undiagnosed or underreported. Without overt, acute symptoms, mild TBIs may be particularly insidious as they are shown to correlate with increased risk of chronic social and cognitive processing impairments, as well as the risk of developing neurodegenerative diseases later in life. Additionally, many people who suffer TBIs, whether on the sports field, field of battle, or even in everyday life, often are at increased risk of additional TBIs, which likely increase the risk of life-long post injury complications. Given these risk factors, there is a clear need to understand how mild TBIs affect the brain both acutely and chronically and develop tactics to properly diagnose and treat mild injuries early.In this dissertation, we argue for the potential use of Auditory Evoked Potentials (AEPs), a clinically used noninvasive set of tests, as an effective route for improved diagnostics of mild TBIs. To achieve this, we must first understand the relationship between underlying anatomical changes and chronic deficits in mild injury. In blast induced TBIs, some of the most common sequalae, both acutely and chronically, are auditory in nature. Temporary changes in hearing thresholds or tinnitus are very common, but chronic impairments in more complex auditory processing tasks, such as hearing speech-in-noise, are often reported as well. Although acute changes are likely due to damage to the peripheral auditory system, there is mounting evidence suggesting damage to central auditory regions may play a clear role in chronic processing changes, however, this is still poorly understood. Recent studies of concussions in sports medicine have found that impact induced TBIs may produce long-term, but not acute, deficits in subtle auditory processing function as well. Given its potential for ubiquitous damage following TBIs of multiple forms, understanding the post-injury central auditory system can act as a window into the time-course and severity of secondary biochemical changes and chronic processing issues seen following mild TBI.Here we use a well-established rat blast TBI model to examine the acute and chronic time course of auditory processing changes, as well as biochemical and anatomical changes. We show a clear biphasic response of acute and chronic changes in auditory processing. Changes in oxidative stress, inflammation, and inhibition/excitation show similar patterns within key regions of the central auditory system (CAS), suggesting a link between AEP results and underlying chronic damage. Our second objective was to design a more clinically relevant and consistent animal model of free-range of motion impact induced TBI. Once developed, we examined similar AEP and immunohistochemical tests to determine the degree of similarity of CAS changes in a second form of TBI. Interesting, while AEP results suggest some long-term changes in auditory processing, these were not identical to blast changes. Finally, we utilized a computational model for axonal node damage to assess one method of potential damage resulting from the oxidative stress changes post injury and provides a framework for future modeling techniques for improved diagnosis and treatment. These results together suggest that AEPs have the potential to improve diagnostics and monitoring tools in mild TBIs, regardless of injury type.
Subject Added Entry-Topical Term  
Trauma.
Subject Added Entry-Topical Term  
Permeability.
Subject Added Entry-Topical Term  
Energy.
Subject Added Entry-Topical Term  
Statistical significance.
Subject Added Entry-Topical Term  
Traumatic brain injury.
Subject Added Entry-Topical Term  
Oxidative stress.
Subject Added Entry-Topical Term  
Neurosciences.
Added Entry-Corporate Name  
Purdue University.
Host Item Entry  
Dissertations Abstracts International. 85-01B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:643770

MARC

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■1001  ▼aFernandez,  Joseph  Mario.
■24510▼aPathophysiological  Changes  Within  the  Central  Auditory  System  Following  Mild  Traumatic  Brain  Injury▼h[electronic  resource]
■260    ▼a[S.l.]▼bPurdue  University.  ▼c2022
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
■300    ▼a1  online  resource(229  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  B.
■500    ▼aAdvisor:  Shi,  Riyi.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2022.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aTraumatic  Brain  Injury  (TBI)  is  one  of  the  most  prevalent  causes  of  injury  in  young  adults,  and  is  a  leading  cause  of  hospitalization,  disability,  and  even  death.  Although  severe  TBI  can  lead  to  serious  acute  injury  (such  as  brain  hemorrhaging  and  skull  fractures)  and  chronic  disability,  the  vast  majority  (~80%)  of  TBIs  are  mild  in  nature,  and  do  not  present  with  such  drastic  symptoms.  As  such,  these  mild  TBIs  may  go  undiagnosed  or  underreported.  Without  overt,  acute  symptoms,  mild  TBIs  may  be  particularly  insidious  as  they  are  shown  to  correlate  with  increased  risk  of  chronic  social  and  cognitive  processing  impairments,  as  well  as  the  risk  of  developing  neurodegenerative  diseases  later  in  life.  Additionally,  many  people  who  suffer  TBIs,  whether  on  the  sports  field,  field  of  battle,  or  even  in  everyday  life,  often  are  at  increased  risk  of  additional  TBIs,  which  likely  increase  the  risk  of  life-long  post  injury  complications.  Given  these  risk  factors,  there  is  a  clear  need  to  understand  how  mild  TBIs  affect  the  brain  both  acutely  and  chronically  and  develop  tactics  to  properly  diagnose  and  treat  mild  injuries  early.In  this  dissertation,  we  argue  for  the  potential  use  of  Auditory  Evoked  Potentials  (AEPs),  a  clinically  used  noninvasive  set  of  tests,  as  an  effective  route  for  improved  diagnostics  of  mild  TBIs.  To  achieve  this,  we  must  first  understand  the  relationship  between  underlying  anatomical  changes  and  chronic  deficits  in  mild  injury.  In  blast  induced  TBIs,  some  of  the  most  common  sequalae,  both  acutely  and  chronically,  are  auditory  in  nature.  Temporary  changes  in  hearing  thresholds  or  tinnitus  are  very  common,  but  chronic  impairments  in  more  complex  auditory  processing  tasks,  such  as  hearing  speech-in-noise,  are  often  reported  as  well.  Although  acute  changes  are  likely  due  to  damage  to  the  peripheral  auditory  system,  there  is  mounting  evidence  suggesting  damage  to  central  auditory  regions  may  play  a  clear  role  in  chronic  processing  changes,  however,  this  is  still  poorly  understood.  Recent  studies  of  concussions  in  sports  medicine  have  found  that  impact  induced  TBIs  may  produce  long-term,  but  not  acute,  deficits  in  subtle  auditory  processing  function  as  well.  Given  its  potential  for  ubiquitous  damage  following  TBIs  of  multiple  forms,  understanding  the  post-injury  central  auditory  system  can  act  as  a  window  into  the  time-course  and  severity  of  secondary  biochemical  changes  and  chronic  processing  issues  seen  following  mild  TBI.Here  we  use  a  well-established  rat  blast  TBI  model  to  examine  the  acute  and  chronic  time  course  of  auditory  processing  changes,  as  well  as  biochemical  and  anatomical  changes.  We  show  a  clear  biphasic  response  of  acute  and  chronic  changes  in  auditory  processing.  Changes  in  oxidative  stress,  inflammation,  and  inhibition/excitation  show  similar  patterns  within  key  regions  of  the  central  auditory  system  (CAS),  suggesting  a  link  between  AEP  results  and  underlying  chronic  damage.  Our  second  objective  was  to  design  a  more  clinically  relevant  and  consistent  animal  model  of  free-range  of  motion  impact  induced  TBI.  Once  developed,  we  examined  similar  AEP  and  immunohistochemical  tests  to  determine  the  degree  of  similarity  of  CAS  changes  in  a  second  form  of  TBI.  Interesting,  while  AEP  results  suggest  some  long-term  changes  in  auditory  processing,  these  were  not  identical  to  blast  changes.  Finally,  we  utilized  a  computational  model  for  axonal  node  damage  to  assess  one  method  of  potential  damage  resulting  from  the  oxidative  stress  changes  post  injury  and  provides  a  framework  for  future  modeling  techniques  for  improved  diagnosis  and  treatment.  These  results  together  suggest  that  AEPs  have  the  potential  to  improve  diagnostics  and  monitoring  tools  in  mild  TBIs,  regardless  of  injury  type.
■590    ▼aSchool  code:  0183.
■650  4▼aTrauma.
■650  4▼aPermeability.
■650  4▼aEnergy.
■650  4▼aStatistical  significance.
■650  4▼aTraumatic  brain  injury.
■650  4▼aOxidative  stress.
■650  4▼aNeurosciences.
■690    ▼a0791
■690    ▼a0317
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g85-01B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2022
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932775▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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