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What Spontaneous Movements Tell Us About Decision-Making and Behavioral States
What Spontaneous Movements Tell Us About Decision-Making and Behavioral States
What Spontaneous Movements Tell Us About Decision-Making and Behavioral States

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105642
ISBN  
9798270213046
DDC  
616
저자명  
Yin, Chaoqun.
서명/저자  
What Spontaneous Movements Tell Us About Decision-Making and Behavioral States
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
119 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisor: Churchland, Anne K.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약Switching between different behavioral states is a common part of daily life. Sometimes we are better engaged in facing challenges at work, while at other times we just want to call it a day and head home early. Despite the ubiquity of behavioral state fluctuation, its neural mechanism is still largely unknown. I applied a behavioral model to the choice patterns of mice trained to perform a decision-making task, in which mice made left-or-right choices based on auditory stimuli. The model revealed one engaged state, characterized by stimulus-based choices, and two disengaged states, characterized by strong left or right choice biases. Analyzing neural activity of the dorsal cortex collected with wide-field imaging further showed that, surprisingly, the averaged activity across the dorsal cortex was unchanged across engagement states, even in the brain regions traditionally believed to be involved in decision-making, such as the parietal cortex. However, the trial-to-trial variance in neural activity was increased during disengagement. Further analyses showed that this extra neural variance was not simply noise associated with bad performance. In fact, seemingly paradoxically, a higher percentage of neural activity was meaningful during disengagement. A closer look further revealed that the neural activity associated with the task variables (stimulus, upcoming choice, etc.) remained consistent across engaged and disengaged states, but movement-related neural activity (whisking, paw movement, etc.) increased during disengagement. This increase resulted from two sources: 1) for some types of movements, each single movement accounted for modestly more neural activity during disengagement. 2) The pattern of spontaneous movement during disengagement became less stereotyped. Interestingly, quantified by motion energy, mice did not move more during disengagement even though their movement became less stereotyped and less predictive Overall, my thesis work uncovered that movements and cognition are intertwined, pointing to a close link between movements and cognition.
일반주제명  
Neurosciences
일반주제명  
Physiology
일반주제명  
Psychology
키워드  
Neural mechanism
키워드  
Decision-making
키워드  
Parietal cortex
키워드  
Auditory stimuli
기타저자  
University of California, Los Angeles Neuroscience 004F
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aYin,  Chaoqun.
■24510▼aWhat  Spontaneous  Movements  Tell  Us  About  Decision-Making  and  Behavioral  States
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a119  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisor:  Churchland,  Anne  K.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aSwitching  between  different  behavioral  states  is  a  common  part  of  daily  life.  Sometimes  we  are  better  engaged  in  facing  challenges  at  work,  while  at  other  times  we  just  want  to  call  it  a  day  and  head  home  early.  Despite  the  ubiquity  of  behavioral  state  fluctuation,  its  neural  mechanism  is  still  largely  unknown.  I  applied  a  behavioral  model  to  the  choice  patterns  of  mice  trained  to  perform  a  decision-making  task,  in  which  mice  made  left-or-right  choices  based  on  auditory  stimuli.  The  model  revealed  one  engaged  state,  characterized  by  stimulus-based  choices,  and  two  disengaged  states,  characterized  by  strong  left  or  right  choice  biases.  Analyzing  neural  activity  of  the  dorsal  cortex  collected  with  wide-field  imaging  further  showed  that,  surprisingly,  the  averaged  activity  across  the  dorsal  cortex  was  unchanged  across  engagement  states,  even  in  the  brain  regions  traditionally  believed  to  be  involved  in  decision-making,  such  as  the  parietal  cortex.  However,  the  trial-to-trial  variance  in  neural  activity  was  increased  during  disengagement.  Further  analyses  showed  that  this  extra  neural  variance  was  not  simply  noise  associated  with  bad  performance.  In  fact,  seemingly  paradoxically,  a  higher  percentage  of  neural  activity  was  meaningful  during  disengagement.  A  closer  look  further  revealed  that  the  neural  activity  associated  with  the  task  variables  (stimulus,  upcoming  choice,  etc.)  remained  consistent  across  engaged  and  disengaged  states,  but  movement-related  neural  activity  (whisking,  paw  movement,  etc.)  increased  during  disengagement.  This  increase  resulted  from  two  sources:  1)  for  some  types  of  movements,  each  single  movement  accounted  for  modestly  more  neural  activity  during  disengagement.  2)  The  pattern  of  spontaneous  movement  during  disengagement  became  less  stereotyped.  Interestingly,  quantified  by  motion  energy,  mice  did  not  move  more  during  disengagement  even  though  their  movement  became  less  stereotyped  and  less  predictive  Overall,  my  thesis  work  uncovered  that  movements  and  cognition  are  intertwined,  pointing  to  a  close  link  between  movements  and  cognition.
■590    ▼aSchool  code:  0031.
■650  4▼aNeurosciences
■650  4▼aPhysiology
■650  4▼aPsychology
■653    ▼aNeural  mechanism
■653    ▼aDecision-making
■653    ▼aParietal  cortex
■653    ▼aAuditory  stimuli
■690    ▼a0317
■690    ▼a0621
■690    ▼a0719
■71020▼aUniversity  of  California,  Los  Angeles▼bNeuroscience  004F.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360945▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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