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Constraints of Self-Neuromodulation: The Role of Neural Variability
Constraints of Self-Neuromodulation: The Role of Neural Variability  / Hannah M Stealey
Constraints of Self-Neuromodulation: The Role of Neural Variability

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260311091533.5
ISBN  
9798270231477
DDC  
612.82
저자명  
Stealey, Hannah M.
서명/저자  
Constraints of Self-Neuromodulation: The Role of Neural Variability / Hannah M Stealey
발행사항  
[Sl] : The University of Texas at Austin, 2025
형태사항  
1 electronic resource (114 pages)
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisors: Santacruz, Samantha R. Committee members: Millan, Jose del R.; Lewis-Peacock, Jarrod A.; Dunn, Andrew K.
학위논문주기  
- Ph.D. : The University of Texas at Austin, 2025.
초록/해제  
요약Variability, a ubiquitous feature of neural activity, is thought to play an integral role in behavior. However, studying neural variability is difficult because measuring all the possible neural activity patterns that produce a single behavior is challenging. By implementing a brain-computer interface (BCI), we circumvented this challenge by establishing a direct, causal relationship between select neurons (BCI neurons) and behavior. We trained monkeys (Macaca mulatta) in a BCI task in which they continuously altered (modulated) neural spiking activity to control a computer cursor. We then challenged our monkeys to adapt to novel BCI protocols (i.e., different task perturbations) and determined how components of neural variability constrained (or supported) subsequent behavioral adaptation. In the first project, we found that how the BCI neuron population covaries remains highly similar before and after adaptation. Additionally, neural populations readily exploit this property to regain proficient cursor control after perturbation - even when this strategy appears behaviorally sub-optimal. Finally, we found evidence that neural variability is disruptive to stable behavior. However, specific components of this variability can be leveraged to adapt behavior when behavioral contexts change and can be used as a metric to predict the amount of behavioral adaptation that is possible within a day. In the second project, we found that individual BCI neurons exhibited a variety of changes in response to task perturbations. Still, monkeys were able to adapt their neural activity enough to regain sufficient cursor control. We found that neurons with high levels of co-variability within the BCI population and neurons that contributed the most to behavioral output changed their activity the least. The mismatch between these measured changes and the changes required to counteract the perturbation fully reliably predicts the amount of behavioral recovery. Overall, we developed a neural variability-based framework that explains and predicts neural limitations of self-modulation.
언어주기  
English
일반주제명  
Psychology
일반주제명  
Biomedical engineering
일반주제명  
Neurosciences
일반주제명  
Clinical psychology
키워드  
Brain-computer interface
키워드  
Neural activity
키워드  
Behavioral adaptation
키워드  
BCI neurons
기타저자  
The University of Texas at Austin Biomedical Engineering
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aStealey,  Hannah  M.▼eauthor.
■24510▼aConstraints  of  Self-Neuromodulation:  The  Role  of  Neural  Variability  ▼cHannah  M  Stealey
■260    ▼a[Sl]▼bThe  University  of  Texas  at  Austin▼c2025
■264  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a1  electronic  resource  (114  pages)
■336    ▼atext▼btxt▼2rdacontent
■337    ▼acomputer▼bc▼2rdamedia
■338    ▼aonline  resource▼bcr▼2rdacarrier
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisors:  Santacruz,  Samantha  R.    Committee  members:  Millan,  Jose  del  R.;  Lewis-Peacock,  Jarrod  A.;  Dunn,  Andrew  K.
■5021  ▼bPh.D.▼cThe  University  of  Texas  at  Austin▼d2025.
■520    ▼aVariability,  a  ubiquitous  feature  of  neural  activity,  is  thought  to  play  an  integral  role  in  behavior.  However,  studying  neural  variability  is  difficult  because  measuring  all  the  possible  neural  activity  patterns  that  produce  a  single  behavior  is  challenging.  By  implementing  a  brain-computer  interface  (BCI),  we  circumvented  this  challenge  by  establishing  a  direct,  causal  relationship  between  select  neurons  (BCI  neurons)  and  behavior.    We  trained  monkeys  (Macaca  mulatta)  in  a  BCI  task  in  which  they  continuously  altered  (modulated)  neural  spiking  activity  to  control  a  computer  cursor.    We  then  challenged  our  monkeys  to  adapt  to  novel  BCI  protocols  (i.e.,  different  task  perturbations)  and  determined  how  components  of  neural  variability  constrained  (or  supported)  subsequent  behavioral  adaptation.  In  the  first  project,  we  found  that  how  the  BCI  neuron  population  covaries  remains  highly  similar  before  and  after  adaptation.    Additionally,  neural  populations  readily  exploit  this  property  to  regain  proficient  cursor  control  after  perturbation  -  even  when  this  strategy  appears  behaviorally  sub-optimal.    Finally,  we  found  evidence  that  neural  variability  is  disruptive  to  stable  behavior.  However,  specific  components  of  this  variability  can  be  leveraged  to  adapt  behavior  when  behavioral  contexts  change  and  can  be  used  as  a  metric  to  predict  the  amount  of  behavioral  adaptation  that  is  possible  within  a  day.  In  the  second  project,  we  found  that  individual  BCI  neurons  exhibited  a  variety  of  changes  in  response  to  task  perturbations.  Still,  monkeys  were  able  to  adapt  their  neural  activity  enough  to  regain  sufficient  cursor  control.    We  found  that  neurons  with  high  levels  of  co-variability  within  the  BCI  population  and  neurons  that  contributed  the  most  to  behavioral  output  changed  their  activity  the  least.    The  mismatch  between  these  measured  changes  and  the  changes  required  to  counteract  the  perturbation  fully  reliably  predicts  the  amount  of  behavioral  recovery.  Overall,  we  developed  a  neural  variability-based  framework  that  explains  and  predicts  neural  limitations  of  self-modulation.
■546    ▼aEnglish
■590    ▼aSchool  code:  0227
■650  4▼aPsychology
■650  4▼aBiomedical  engineering
■650  4▼aNeurosciences
■650  4▼aClinical  psychology
■653    ▼aBrain-computer  interface
■653    ▼aNeural  activity
■653    ▼aBehavioral  adaptation
■653    ▼aBCI  neurons
■7102  ▼aThe  University  of  Texas  at  Austin▼bBiomedical  Engineering.▼edegree  granting  institution.
■7201  ▼aSantacruz,  Samantha  R.▼edegree  supervisor.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361196▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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