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Normative Approaches to the Analysis of Neural Dynamics and Connectivity
Normative Approaches to the Analysis of Neural Dynamics and Connectivity
Normative Approaches to the Analysis of Neural Dynamics and Connectivity

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151327
ISBN  
9798384452201
DDC  
574.191
저자명  
Kumar, Ankit.
서명/저자  
Normative Approaches to the Analysis of Neural Dynamics and Connectivity
발행사항  
[Sl] : University of California, Berkeley, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
130 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Bouchard, Kristofer E.;DeWeese, Michael.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2024.
초록/해제  
요약Brain functions, ranging from perception to cognition to action are produced by the collective dynamics of populations of neurons. Our ability to simultaneously record from and map the connectivity between large numbers of neurons across brain areas has increased substantially over the past decade. In contrast, our understanding of the resulting complex and dynamic data in terms of principles of brain computations is lacking. This thesis presents theory and statistical methods that address this gap. I first describe a novel, normative theory of neural population dynamics based on control theory. I introduce novel dimensionality reduction methods that identify subspaces of neural activity that are most amenable to feed-forward (i.e. open-loop) control vs. feedback control (i.e. closed-loop) control. Through new theorems/simulations, I demonstrate that for systems exhibiting non-normal dynamics, generically present in cortex due to Dale's Law, directions most important for feedforward vs. feedback control are geometrically distinct. I then analyze neural recordings from macaque primary motor and somatosensory cortices and show that the dynamics that are most feedback controllable are aligned with those that generate reaching behavior. These feedback controllable dynamics are shown to be mediated by the functional interactions between a population of neurons whose characteristics map to known features of Layer 5 intrauterine cephalic neurons. Lastly, I show that feedback controllability provides a normative account for the presence of rotational dynamics in motor cortex. Next, I present an approach an analysis of the Drosophila hemibrain connectome using novel maximum entropy models of random graphs inspired from statistical physics. I provide preliminary results indicating that the controllability of Drosophila brain networks relies on emergent principles of connectivity between neurons. Finally, I report on work that characterizes the performance of statistical estimation of sparse linear models in the case when model features exhibited correlated variability, a common issue in neural data analysis. The results provide practical guidelines relevant for the estimation of functional connectivity.
일반주제명  
Biophysics
일반주제명  
Neurosciences
일반주제명  
Physics
키워드  
Computational neuroscience
키워드  
Connectomics
키워드  
Control theory
키워드  
Motor cortex
키워드  
Sparse regression
기타저자  
University of California, Berkeley Physics
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI31240290
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574.191
■1001  ▼aKumar,  Ankit.
■24510▼aNormative  Approaches  to  the  Analysis  of  Neural  Dynamics  and  Connectivity
■260    ▼a[Sl]▼bUniversity  of  California,  Berkeley▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a130  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Bouchard,  Kristofer  E.;DeWeese,  Michael.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2024.
■520    ▼aBrain  functions,  ranging  from  perception  to  cognition  to  action  are  produced  by  the  collective  dynamics  of  populations  of  neurons.  Our  ability  to  simultaneously  record  from  and  map  the  connectivity  between  large  numbers  of  neurons  across  brain  areas  has  increased  substantially  over  the  past  decade.  In  contrast,  our  understanding  of  the  resulting  complex  and  dynamic  data  in  terms  of  principles  of  brain  computations  is  lacking.  This  thesis  presents  theory  and  statistical  methods  that  address  this  gap.  I  first  describe  a  novel,  normative  theory  of  neural  population  dynamics  based  on  control  theory.  I  introduce  novel  dimensionality  reduction  methods  that  identify  subspaces  of  neural  activity  that  are  most  amenable  to  feed-forward  (i.e.  open-loop)  control  vs.  feedback  control  (i.e.  closed-loop)  control.  Through  new  theorems/simulations,  I  demonstrate  that  for  systems  exhibiting  non-normal  dynamics,  generically  present  in  cortex  due  to  Dale's  Law,  directions  most  important  for  feedforward  vs.  feedback  control  are  geometrically  distinct.  I  then  analyze  neural  recordings  from  macaque  primary  motor  and  somatosensory  cortices  and  show  that  the  dynamics  that  are  most  feedback  controllable  are  aligned  with  those  that  generate  reaching  behavior.  These  feedback  controllable  dynamics  are  shown  to  be  mediated  by  the  functional  interactions  between  a  population  of  neurons  whose  characteristics  map  to  known  features  of  Layer  5  intrauterine  cephalic  neurons.  Lastly,  I  show  that  feedback  controllability  provides  a  normative  account  for  the  presence  of  rotational  dynamics  in  motor  cortex.  Next,  I  present  an  approach  an  analysis  of  the  Drosophila  hemibrain  connectome  using  novel  maximum  entropy  models  of  random  graphs  inspired  from  statistical  physics.  I  provide  preliminary  results  indicating  that  the  controllability  of  Drosophila  brain  networks  relies  on  emergent  principles  of  connectivity  between  neurons.  Finally,  I  report  on  work  that  characterizes  the  performance  of  statistical  estimation  of  sparse  linear  models  in  the  case  when  model  features  exhibited  correlated  variability,  a  common  issue  in  neural  data  analysis.  The  results  provide  practical  guidelines  relevant  for  the  estimation  of  functional  connectivity.
■590    ▼aSchool  code:  0028.
■650  4▼aBiophysics
■650  4▼aNeurosciences
■650  4▼aPhysics
■653    ▼aComputational  neuroscience
■653    ▼aConnectomics
■653    ▼aControl  theory
■653    ▼aMotor  cortex
■653    ▼aSparse  regression
■690    ▼a0786
■690    ▼a0317
■690    ▼a0605
■71020▼aUniversity  of  California,  Berkeley▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161228▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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