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Flexible Opto-Electro-Chemical Neural Probes for Neuromodulation and Imaging
Flexible Opto-Electro-Chemical Neural Probes for Neuromodulation and Imaging
Flexible Opto-Electro-Chemical Neural Probes for Neuromodulation and Imaging

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211152936
ISBN  
9798384456360
DDC  
621.3
저자명  
Malekoshoaraie, Mohammad Hassan.
서명/저자  
Flexible Opto-Electro-Chemical Neural Probes for Neuromodulation and Imaging
발행사항  
[Sl] : Carnegie Mellon University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
127 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Chamanzar, Maysamreza.
학위논문주기  
Thesis (Ph.D.)--Carnegie Mellon University, 2024.
초록/해제  
요약Brain consists of billions of neurons interconnected through complex circuits to perform functions. Understanding the neural basis of brain function requires probing neural circuits and understanding the specific roles of various cell types within the brain. Simultaneous neuromodulation and electrophysiology recording with high spatial and temporal resolution can help us isolate and study neural circuits. In this thesis, we discuss novel flexible neural probes for multi-modal neural interfacing with the brain. These implantable flexible neural probes are microfabricated on biocompatible, flexible substrates to provide three functionalities, i.e., (i) electrophysiology recording, (ii) endoscopic microimaging, and (iii) chemical stimulation to enable studying specific cell-types and neural circuit dynamics in the brain. These flexible neural implants can help advance basic neuroscience research and also devise effective therapeutics for brain disorders. First, I introduce a fully flexible electrochemical neural probe designed for chemical neuromodulation using an electrically-actuated drug delivery mechanism, enabling highly localized, on-demand/controlled release of neurotransmitters. The evoked neural response is monitored using high-resolution electrophysiology recording. This tool allows researchers to modulate neurotransmitter activity and thereby activate or inhibit neurons to study their roles within neural circuits in normal as well as diseased conditions. Brain function resulted from population activities of different cell types categorized based on their transcriptional profiles. To identify and study specific cell types within a population, cells can be tagged and imaged based on their genetic profiles using photometry techniques. However, photometric imaging is usually carried out using single-channel bulky fiber optics, thus lacking spatial resolution and causing significant tissue damage. To address these issues, I introduced an ultra-miniaturized microimager endoscope using a novel thin-film flexible, miniaturized optical waveguide array designed for localized fluorescent imaging with high spatial resolution. With a thickness of only 7 µm, this implantable microimager can image from 20 channels over a width of 400 µm to spatially discriminate different regions in the brain. This technology can be used to study the roles of specific cells tagged within different brain regions. To modulate the activity of specific cell types within the brain tissue, I have shown that the thin-film waveguide array can also be used for light delivery and optogenetic stimulation. To this end, I have optimized a microfabrication process to integrate electrical recording functionality with the optical waveguide array. I will discuss the design, implementation, characterization, and demonstration of these neural technologies, all realized on thin-film flexible polymer neural implants.
일반주제명  
Electrical engineering
일반주제명  
Neurosciences
일반주제명  
Optics
일반주제명  
Computer engineering
일반주제명  
Biomedical engineering
키워드  
Chemical neuromodulation
키워드  
Electrophysiology recording
키워드  
Flexible neural implants
키워드  
Fluorescence imaging
키워드  
Multimodal neural probes
키워드  
Optogenetics
기타저자  
Carnegie Mellon University Electrical and Computer Engineering
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aMalekoshoaraie,  Mohammad  Hassan.
■24510▼aFlexible  Opto-Electro-Chemical  Neural  Probes  for  Neuromodulation  and  Imaging
■260    ▼a[Sl]▼bCarnegie  Mellon  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a127  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Chamanzar,  Maysamreza.
■5021  ▼aThesis  (Ph.D.)--Carnegie  Mellon  University,  2024.
■520    ▼aBrain  consists  of  billions  of  neurons  interconnected  through  complex  circuits  to  perform  functions.  Understanding  the  neural  basis  of  brain  function  requires  probing  neural  circuits  and  understanding  the  specific  roles  of  various  cell  types  within  the  brain.  Simultaneous  neuromodulation  and  electrophysiology  recording  with  high  spatial  and  temporal  resolution  can  help  us  isolate  and  study  neural  circuits.  In  this  thesis,  we  discuss  novel  flexible  neural  probes  for  multi-modal  neural  interfacing  with  the  brain.  These  implantable  flexible  neural  probes  are  microfabricated  on  biocompatible,  flexible  substrates  to  provide  three  functionalities,  i.e.,  (i)  electrophysiology  recording,  (ii)  endoscopic  microimaging,  and  (iii)  chemical  stimulation  to  enable  studying  specific  cell-types  and  neural  circuit  dynamics  in  the  brain.  These  flexible  neural  implants  can  help  advance  basic  neuroscience  research  and  also  devise  effective  therapeutics  for  brain  disorders. First,  I  introduce  a  fully  flexible  electrochemical  neural  probe  designed  for  chemical  neuromodulation  using  an  electrically-actuated  drug  delivery  mechanism,  enabling  highly  localized,  on-demand/controlled  release  of  neurotransmitters.  The  evoked  neural  response  is  monitored  using  high-resolution  electrophysiology  recording.  This  tool  allows  researchers  to  modulate  neurotransmitter  activity  and  thereby  activate  or  inhibit  neurons  to  study  their  roles  within  neural  circuits  in  normal  as  well  as  diseased  conditions.  Brain  function  resulted  from  population  activities  of  different  cell  types  categorized  based  on  their  transcriptional  profiles.  To  identify  and  study  specific  cell  types  within  a  population,  cells  can  be  tagged  and  imaged  based  on  their  genetic  profiles  using  photometry  techniques.  However,  photometric  imaging  is  usually  carried  out  using  single-channel  bulky  fiber  optics,  thus  lacking  spatial  resolution  and  causing  significant  tissue  damage.  To  address  these  issues,  I  introduced  an  ultra-miniaturized  microimager  endoscope  using  a  novel  thin-film  flexible,  miniaturized  optical  waveguide  array  designed  for  localized  fluorescent  imaging  with  high  spatial  resolution.  With  a  thickness  of  only  7  µm,  this  implantable  microimager  can  image  from  20  channels  over  a  width  of  400  µm  to  spatially  discriminate  different  regions  in  the  brain.  This  technology  can  be  used  to  study  the  roles  of  specific  cells  tagged  within  different  brain  regions.  To  modulate  the  activity  of  specific  cell  types  within  the  brain  tissue,  I  have  shown  that  the  thin-film  waveguide  array  can  also be  used  for  light  delivery  and  optogenetic  stimulation.  To  this  end,  I  have  optimized  a  microfabrication  process  to  integrate  electrical  recording  functionality  with  the  optical  waveguide  array.  I  will  discuss  the  design,  implementation,  characterization,  and  demonstration  of  these  neural  technologies,  all  realized  on  thin-film  flexible  polymer  neural  implants.
■590    ▼aSchool  code:  0041.
■650  4▼aElectrical  engineering
■650  4▼aNeurosciences
■650  4▼aOptics
■650  4▼aComputer  engineering
■650  4▼aBiomedical  engineering
■653    ▼aChemical  neuromodulation
■653    ▼aElectrophysiology  recording
■653    ▼aFlexible  neural  implants
■653    ▼aFluorescence  imaging
■653    ▼aMultimodal  neural  probes
■653    ▼aOptogenetics
■690    ▼a0544
■690    ▼a0317
■690    ▼a0752
■690    ▼a0541
■690    ▼a0464
■71020▼aCarnegie  Mellon  University▼bElectrical  and  Computer  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0041
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164228▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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