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Development, Anatomy, and Function of Prefrontal Circuits in Threat Avoidance- [electronic resource]
Development, Anatomy, and Function of Prefrontal Circuits in Threat Avoidance - [electroni...
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Development, Anatomy, and Function of Prefrontal Circuits in Threat Avoidance- [electronic resource]
자료유형  
 학위논문파일 국외
최종처리일시  
20240214101911
ISBN  
9798380349475
DDC  
616
저자명  
Klune, Cassandra Bernadette Lindsay.
서명/저자  
Development, Anatomy, and Function of Prefrontal Circuits in Threat Avoidance - [electronic resource]
발행사항  
[S.l.]: : University of California, Los Angeles., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(205 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Wilke, Laura Anne.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Threat avoidance is a key survival behavior that keeps animals away from harm. However, threat avoidance must be balanced with other behaviors important for survival and well-being, including feeding and social interaction. Excessive avoidance, especially in the absence of threat, is a hallmark symptom of numerous psychiatric disorders including OCD, depression, phobias, and anxiety disorders. Many of these disorders arise early in life. Understanding the neural circuit basis of threat avoidance across development and in adulthood is necessary to understand how these circuits may be perturbed to contribute to psychiatric disease.Output circuits from the medial prefrontal cortex (mPFC) control both innate and learned threat avoidance behaviors. Two unique features of mPFC - its prolonged development and intricate connectivity - may make it particularly well suited to regulate adaptive responses to a dynamic environment. Compared to other brain regions, mPFC undergoes an extended maturation that lasts into early adulthood. The demands for threat avoidance change with developmental stage and the prolonged maturation of mPFC may support dynamic circuit changes that contribute to age-specific avoidance strategies. However, we do not understand how the mPFC circuits underlying threat avoidance mature and contribute to behavior in early life. Second, mPFC output circuits are anatomically complex and display a high degree of collateralization. Collateralization of mPFC projections may be a mechanism to precisely coordinate activity in multiple downstream regions to produce behavior, however, complex connectivity patterns have yet to be linked with the behavioral contributions of mPFC circuits.This thesis elucidates how the circuit maturation and connectivity of mPFC shapes threat avoidance behavior. Using optogenetics, fiber photometry, viral circuit mapping, and slice electrophysiology, this thesis provides convergent evidence that prefrontal projections to the basolateral amygdala and nucleus accumbens change their function throughout early life to shape age-specific avoidance phenotypes. This thesis also reveals the brain wide connectivity patterns of mPFC neurons defined by their projections to the ventral tegmental area, nucleus accumbens, and contralateral mPFC in adult mice. Differential roles of each of these projection classes in learned and innate avoidance were also discovered. Finally, this thesis presents two new user-friendly analysis pipelines to quantify brain wide axonal projections and labelled cell bodies allowing others to continue to probe circuit function together with complex anatomy. The circuits and maturational processes uncovered may be key sites of disruption that lead to psychiatric disease and potential targets for therapeutic intervention.
일반주제명  
Neurosciences.
일반주제명  
Behavioral sciences.
일반주제명  
Developmental biology.
키워드  
Avoidance
키워드  
Circuit development
키워드  
Neuroanatomy
키워드  
Prefrontal cortex
키워드  
Threat
기타저자  
University of California, Los Angeles Neuroscience 004F
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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