Dynamics of Artificial Sensory Representations in Mouse Somatosensory Cortex- [electronic resource]
Dynamics of Artificial Sensory Representations in Mouse Somatosensory Cortex- [electronic resource]
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214101156
- ISBN
- 9798380620062
- DDC
- 616
- 저자명
- Pancholi, Ravi.
- 서명/저자
- Dynamics of Artificial Sensory Representations in Mouse Somatosensory Cortex - [electronic resource]
- 발행사항
- [S.l.]: : New York University., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(238 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
- 주기사항
- Advisor: Peron, Simon P.
- 학위논문주기
- Thesis (Ph.D.)--New York University, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약Direct cortical stimulation has been used for over a century to identify the role that specific brain areas play in perception and behavior. Within sensory cortex, this technique has been used to reveal the function of cortical regions, modulate perception, and provide sensory feedback as part of brain-machine interfaces. However, because of technological limitations, we have yet to understand how direct cortical stimulation impacts the neurons and neural circuits within sensory cortex. In particular, we have a poor understanding of how sensory cortex responds to artificial stimulation over time and how the evoked activity interacts with existing cortical circuitry. In this dissertation, I describe my work using optogenetics and optical imaging to study the dynamics of artificial sensory representations in mouse primary vibrissal somatosensory cortex (vS1). First, using a combined photostimulation and two-photon imaging approach, I observe neural activity across training as animals learn or fail to learn an optical microstimulation discrimination task. I show that training is associated with a sparsification of the photostimulus response and that animals with greater response stability are more likely to learn the task. Next, I compare activity evoked by optical microstimulation of vS1 with that evoked by natural sensory stimuli. I find that photostimulation engages recurrently coupled neurons responding to whisker touch more than expected by chance. Repeated exposure to simultaneous touch and optogenetic stimuli increases the interaction between the two stimulus representations. These results provide insight into how activity evoked by direct cortical stimulation interacts with existing cortical circuits and how variability in artificial sensory representations may influence perception and behavior.
- 일반주제명
- Neurosciences.
- 일반주제명
- Biomedical engineering.
- 일반주제명
- Biology.
- 키워드
- Microstimulation
- 키워드
- Optogenetics
- 키워드
- Sensory cortex
- 기타저자
- New York University Basic Medical Science
- 기본자료저록
- Dissertations Abstracts International. 85-04B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.