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Constraints of Self-Neuromodulation: The Role of Neural Variability
Constraints of Self-Neuromodulation: The Role of Neural Variability
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091533.5
- ISBN
- 9798270231477
- DDC
- 612.82
- 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
- Neural activity
- 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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■00520260311091533.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798270231477
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a612.82
■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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