[AUDITORY] Seminar Announcement - January 18 - E.A.R.S. (Electronic Auditory Research Seminars) ("Vogler, Nathan" )

Subject: [AUDITORY] Seminar Announcement - January 18 - E.A.R.S. (Electronic Auditory Research Seminars) From: "Vogler, Nathan" <Nathan.Vogler@xxxxxxxx> Date: Thu, 13 Jan 2022 16:28:15 +0000 --_000_MN2PR04MB612746AA08352591B884C9EFC8539MN2PR04MB6127namp_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Dear fellow neuroscientists, We would like to invite you to join us on Tuesday, January 18 at 1:00 pm ES= T (UTC-5) for the next edition of E.A.R.S. (Electronic Auditory Research Se= minars), a monthly auditory seminar series with the focus on central audito= ry processing and circuits. Please pre-register (for free) and tune in via = Crowdcast (enter your email to receive the link for the talk): https://www.= crowdcast.io/e/ears/14 (Note: for optimal performance, we recommend using Google Chrome as your br= owser). Dr. Kerry Walker (University of Oxford): * "Hearing in an acoustically varied world" * In order for animals to thrive in their complex environments, their s= ensory systems must form representations of objects that are invariant to c= hanges in some dimensions of their physical cues. For example, we can recog= nize a friend=92s speech in a forest, a small office, and a cathedral, even= though the sound reaching our ears will be very different in these three e= nvironments. I will discuss our recent experiments into how neurons in audi= tory cortex can form stable representations of sounds in this acoustically = varied world. We began by using a normative computational model of hearing = to examine how the brain may recognize a sound source across rooms with dif= ferent levels of reverberation. The model predicted that reverberations can= be removed from the original sound by delaying the inhibitory component of= spectrotemporal receptive fields in the presence of stronger reverberation= . Our electrophysiological recordings then confirmed that neurons in ferret= auditory cortex apply this algorithm to adapt to different room sizes. Our= results demonstrate that this neural process is dynamic and adaptive. Thes= e studies provide new insights into how we can recognize auditory objects e= ven in highly reverberant environments, and direct further research questio= ns about how reverb adaptation is implemented in the cortical circuit. Dr. Lizabeth Romanski (University of Rochester): * =93Investigation of Identity and Expression Processing in Ventrolater= al Prefrontal Cortex=94 * Previous studies have demonstrated that the ventrolateral prefrontal = cortex (VLPFC) processes and integrates social communication information in= cluding faces and vocalizations. Features embedded within audiovisual stimu= li, including emotional expression and caller identity, provide abundant in= formation about an individual=92s intention, emotional state, motivation, a= nd social status, which are important to encode in a social exchange. Howev= er, it is unknown to what extent the VLPFC encodes such features. We examin= ed the responses of VLPFC neurons to face and vocal stimuli which differed = by either identity or expression. First, we recorded single-unit activity w= hile macaques performed a discrimination task using species-specific face+v= ocalization stimuli. We found that a large proportion of VLPFC cells demons= trated a significant change in activity during the sample, delay, or nonmat= ch task periods of the task while a subset of neurons was modulated by the = identity, emotional expression, or both features, within the face-vocalizat= ion stimuli. In further recordings, we explored the population coding of id= entity and expression in response to naturalistic vocalization movie stimul= i by VLPFC neurons. Linear Discriminant Analysis of single cell firings rat= es revealed greater than chance decoding of expression and identity. Time b= inned decoding of the pseudo-population resulted in early and sustained ide= ntity decoding accuracy compared to expression. Analysis of the locations o= f identity and expression related cells in recorded VLPFC neurons indicated= that fewer neurons showed significant responses related to expression and = these cells were concentrated in the most anterolateral quadrant of the rec= ording area, approximately area 12vl, whereas identity related cells were m= ore widespread in VLPFC. These findings indicate a role for VLPFC in the pr= ocessing of identity and expression in social communication stimuli and sug= gest differences between anterolateral and posterior regions of VLPFC. Additional upcoming E.A.R.S. seminars (1:00 pm ET): February 15: * Ioana Carcea (Rutgers University) * Liberty Hamilton (University of Texas at Austin) March 15: * Trainee Talks (TBD) April 19: * NIDCD + BRAIN Initiative May 10: * Diego Elgueda (University of Chile) * Narayan Sankaran (University of California San Francisco) With kind wishes, Maria Geffen Yale Cohen Steve Eliades Stephen David Alexandria Lesicko Nathan Vogler Jean-Hugues Lestang Huaizhen Cai --_000_MN2PR04MB612746AA08352591B884C9EFC8539MN2PR04MB6127namp_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable <html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc= hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of= fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1= 252"> <meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" style=3D"word-wrap:= break-word"> <div class=3D"WordSection1"> Dear fellow neuroscienti= sts, <o:p></o:p></= p> <p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps= : normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju= st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">   <o:p></o:p> <p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps= : normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju= st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> We would like to invite you to join us on Tuesday, January 18<spa= n class=3D"apple-converted-space"> at 1:00 pm EST (UTC-5) for t= he next edition of E.A.R.S. (Electronic Auditory Research Seminars), a monthly auditory seminar series with the focus on ce= ntral auditory processing and circuits. Please pre-register (for free) and = tune in via Crowdcast (enter your email to receive the link for the talk):<= span class=3D"apple-converted-space"> <a href=3D"https://www.cr= owdcast.io/e/ears/14" title=3D"https://www.crowdcast.io/e/ears/14">https://www.crowdcast.io/e/ears/14</a><o:p></o= :p> <p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps= : normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju= st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> (Note: for optimal performance, we recommend us= ing Google Chrome as your browser).<o:p></o:p> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> <o:p> </o:p></b= > Dr. Kerry Walker (University of Oxford):<o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l0 level1 lfo1;backgr= ound:white"> "Hearing in an acoustically varied wo= rld"<o:p></o:p></li><li class=3D"MsoNormal" style=3D"color:blac= k;mso-list:l0 level1 lfo1;background:white"> In order for animals to thrive in their co= mplex environments, their sensory systems must form representations of obje= cts that are invariant to changes in some dimensions of their physical cues= . For example, we can recognize a friend=92s speech in a forest, a small office, and a cathedral, even thoug= h the sound reaching our ears will be very different in these three environ= ments. I will discuss our recent experiments into how neurons in auditory c= ortex can form stable representations of sounds in this acoustically varied world. We began by using a normative= computational model of hearing to examine how the brain may recognize a so= und source across rooms with different levels of reverberation. The model p= redicted that reverberations can be removed from the original sound by delaying the inhibitory component of= spectrotemporal receptive fields in the presence of stronger reverberation= . Our electrophysiological recordings then confirmed that neurons in ferret= auditory cortex apply this algorithm to adapt to different room sizes. Our results demonstrate that this neural= process is dynamic and adaptive. These studies provide new insights into h= ow we can recognize auditory objects even in highly reverberant environment= s, and direct further research questions about how reverb adaptation is implemented in the cortical circuit.= <o:p></o:p></li></ul> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> <o:p> </o:p></b= > Dr. Lizabeth Romanski (University of Rochester):<o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l5 level1 lfo2;backgr= ound:white"> =93Investigation of Identity and Expressio= n Processing in Ventrolateral Prefrontal Cortex=94<o:p></o:p></li><l= i class=3D"MsoNormal" style=3D"color:black;mso-list:l5 level1 lfo2;backgrou= nd:white"> Previous studies have demonstrated that th= e ventrolateral prefrontal cortex (VLPFC) processes and integrates social c= ommunication information including faces and vocalizations. Features embedd= ed within audiovisual stimuli, including emotional expression and caller identity, provide abundant information abo= ut an individual=92s intention, emotional state, motivation, and social sta= tus, which are important to encode in a social exchange. However, it is unk= nown to what extent the VLPFC encodes such features. We examined the responses of VLPFC neurons to face and voca= l stimuli which differed by either identity or expression. First, we record= ed single-unit activity while macaques performed a discrimination task usin= g species-specific face+vocalization stimuli. We found that a large proportion of VLPFC cells demonstrated a si= gnificant change in activity during the sample, delay, or nonmatch task per= iods of the task while a subset of neurons was modulated by the identity, e= motional expression, or both features, within the face-vocalization stimuli. In further recordings, we explored t= he population coding of identity and expression in response to naturalistic= vocalization movie stimuli by VLPFC neurons. Linear Discriminant Analysis = of single cell firings rates revealed greater than chance decoding of expression and identity. Time binned decod= ing of the pseudo-population resulted in early and sustained identity decod= ing accuracy compared to expression. Analysis of the locations of identity = and expression related cells in recorded VLPFC neurons indicated that fewer neurons showed significant res= ponses related to expression and these cells were concentrated in the most = anterolateral quadrant of the recording area, approximately area 12vl, wher= eas identity related cells were more widespread in VLPFC. These findings indicate a role for VLPFC in the = processing of identity and expression in social communication stimuli and s= uggest differences between anterolateral and posterior regions of VLPFC.</s= pan><o:p></o:p></li></ul> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">  <o:p></o:p> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> Additional upcoming E.A.R.S. s= eminars (1:00 pm ET):<o:p></o:p><= /p> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> February 15:<spa= n style=3D"color:black"><o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l1 level1 lfo3;backgr= ound:white"> Ioana Carcea (Rutgers University)<o:p></o:p></li><li class= =3D"MsoNormal" style=3D"color:black;mso-list:l1 level1 lfo3;background:whit= e"> Liberty Hamilton (University of Texas at Austin)<o:p></o:= p></li></ul> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> March 15:<o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l2 level1 lfo4;backgr= ound:white"> Trainee Talks (TBD)<o:p></o:p></li></ul> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> April 19:<o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l4 level1 lfo5;backgr= ound:white"> NIDCD + BRAIN Initiative<o:p= ></o:p></li></ul> <p class=3D"MsoNormal" style=3D"background:white;caret-color: rgb(0, 0, 0);= font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk= it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"> May 10:<o:p></o:p> <ul style=3D"margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: no= rmal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: = auto;-webkit-text-stroke-width: 0px;word-spacing:0px" type=3D"disc"> <li class=3D"MsoNormal" style=3D"color:black;mso-list:l3 level1 lfo6;backgr= ound:white"> Diego Elgueda (University of Chile)<o:p></o:p></li><li cla= ss=3D"MsoNormal" style=3D"color:black;mso-list:l3 level1 lfo6;background:wh= ite"> Narayan Sankaran (University of California San Francisco)= <o:p></o:p></li></ul> <o:p> </o:p> With kind wishes, <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px">   = <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Maria Geffen=  <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Yale Cohen&n= bsp;<o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Steve Eliades <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Stephen David <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Alexandria Lesicko <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Nathan Vogler <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Jean-Hugues Lestang <o:p></o:p> <p style=3D"margin:0in;font-variant-caps: normal;orphans: auto;text-align:s= tart;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width:= 0px;caret-color: rgb(225, 224, 223);word-spacing:0px"> Huaizhen Cai=  <o:p></o:p> <o:p> </o:p> </div> </body> </html> --_000_MN2PR04MB612746AA08352591B884C9EFC8539MN2PR04MB6127namp_--

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