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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
- Connectomics
- 키워드
- Control theory
- 키워드
- Motor cortex
- 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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■00520250211151327
■006m o d
■007cr#unu||||||||
■020 ▼a9798384452201
■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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