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Identifying Patterns of Decision Making and Motor Behavior Relevant to Schizophrenia in Mouse Models
Identifying Patterns of Decision Making and Motor Behavior Relevant to Schizophrenia in Mo...
Identifying Patterns of Decision Making and Motor Behavior Relevant to Schizophrenia in Mouse Models

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자료유형  
 학위논문 서양
최종처리일시  
20260202105117
ISBN  
9798293866182
DDC  
153
저자명  
Mueller, Dana M.
서명/저자  
Identifying Patterns of Decision Making and Motor Behavior Relevant to Schizophrenia in Mouse Models
발행사항  
[Sl] : University of Minnesota, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
211 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Grissom, Nicola;Vilares, Iris.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2025.
초록/해제  
요약Schizophrenia is often characterized by thoughts or experiences that seem out of touch with reality, disorganized speech or behavior, and difficulty with cognition, especially executive function. Quality of life is most impacted by cognitive deficits, which are a high priority for translational research. Executive dysfunctions in schizophrenia are particularly noted in decision making, which can be assessed across species using a restless bandit task, in which the reward probability of each choice changes randomly and independently across trials to measure explore/exploit balance. With this task we can investigate how different aspects of decision making relevant to schizophrenia are impacted in mouse models. In this dissertation, I present three studies investigating in mice how 1) sex differences influence motor variability in decision making, 2) two models - one genetic (16p11.2 duplication) and one pharmacological (NMDA-receptor antagonist) - for risk factors for psychosis impact decision making, and 3) population dynamics in the frontal cortex underlie decision making strategies. Study 1 used touch responses to study action variability in decision making and found independent effects of explore/exploit state, prior reward, and sex. Study 2 found that decision making was altered at different stages of the task by different models for risk factors for schizophrenia. First, 16p11.2 duplication revealed a male-biased vulnerability in early operant training suggesting an impact in strategies for learning early schemas or navigating novel environments. Second, MK-801 injection revealed that NMDA-receptors are influential in the ability to flexibly switch between choices, and that disrupting this function significantly impairs decision making in all animals. Finally, Study 3 used an in-vivo electrophysiology technique to study neuronal population activity during freely moving behavior, finding stronger encoding of exploit state strategy compared to explore state across mouse frontal cortex. Together these experiments show that the explore/exploit balance is represented both in motor behavior and neural activity, but models for risk factors for schizophrenia impact multiple facets of decision making beyond explore/exploit balance.
일반주제명  
Cognitive psychology
일반주제명  
Behavioral psychology
일반주제명  
Neurosciences
일반주제명  
Medicine
키워드  
16P11.2 duplication
키워드  
Bandit
키워드  
Mk-801
키워드  
Prefrontal cortex
키워드  
Reinforcement learning
키워드  
Touchscreen
기타저자  
University of Minnesota Psychology
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
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■1001  ▼aMueller,  Dana  M.
■24510▼aIdentifying  Patterns  of  Decision  Making  and  Motor  Behavior  Relevant  to  Schizophrenia  in  Mouse  Models
■260    ▼a[Sl]▼bUniversity  of  Minnesota▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a211  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Grissom,  Nicola;Vilares,  Iris.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2025.
■520    ▼aSchizophrenia  is  often  characterized  by  thoughts  or  experiences  that  seem  out  of  touch  with  reality,  disorganized  speech  or  behavior,  and  difficulty  with  cognition,  especially  executive  function.  Quality  of  life  is  most  impacted  by  cognitive  deficits,  which  are  a  high  priority  for  translational  research.  Executive  dysfunctions  in  schizophrenia  are  particularly  noted  in  decision  making,  which  can  be  assessed  across  species  using  a  restless  bandit  task,  in  which  the  reward  probability  of  each  choice  changes  randomly  and  independently  across  trials  to  measure  explore/exploit  balance.  With  this  task  we  can  investigate  how  different  aspects  of  decision  making  relevant  to  schizophrenia  are  impacted  in  mouse  models.  In  this  dissertation,  I  present  three  studies  investigating  in  mice  how  1)  sex  differences  influence  motor  variability  in  decision  making,  2)  two  models  -  one  genetic  (16p11.2  duplication)  and  one  pharmacological  (NMDA-receptor  antagonist)  -  for  risk  factors  for  psychosis  impact  decision  making,  and  3)  population  dynamics  in  the  frontal  cortex  underlie  decision  making  strategies.  Study  1  used  touch  responses  to  study  action  variability  in  decision  making  and  found  independent  effects  of  explore/exploit  state,  prior  reward,  and  sex.  Study  2  found  that  decision  making  was  altered  at  different  stages  of  the  task  by  different  models  for  risk  factors  for  schizophrenia.  First,  16p11.2  duplication  revealed  a  male-biased  vulnerability  in  early  operant  training  suggesting  an  impact  in  strategies  for  learning  early  schemas  or  navigating  novel  environments.  Second,  MK-801  injection  revealed  that  NMDA-receptors  are  influential  in  the  ability  to  flexibly  switch  between  choices,  and  that  disrupting  this  function  significantly  impairs  decision  making  in  all  animals.  Finally,  Study  3  used  an  in-vivo  electrophysiology  technique  to  study  neuronal  population  activity  during  freely  moving  behavior,  finding  stronger  encoding  of  exploit  state  strategy  compared  to  explore  state  across  mouse  frontal  cortex.  Together  these  experiments  show  that  the  explore/exploit  balance  is  represented  both  in  motor  behavior  and  neural  activity,  but  models  for  risk  factors  for  schizophrenia  impact  multiple  facets  of  decision  making  beyond  explore/exploit  balance.
■590    ▼aSchool  code:  0130.
■650  4▼aCognitive  psychology
■650  4▼aBehavioral  psychology
■650  4▼aNeurosciences
■650  4▼aMedicine
■653    ▼a16P11.2  duplication
■653    ▼aBandit
■653    ▼aMk-801
■653    ▼aPrefrontal  cortex
■653    ▼aReinforcement  learning
■653    ▼aTouchscreen
■690    ▼a0633
■690    ▼a0384
■690    ▼a0317
■690    ▼a0564
■71020▼aUniversity  of  Minnesota▼bPsychology.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359424▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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