<div dir="ltr"><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-US">The group
of Alex Roxin <a href="https://sites.google.com/site/alexanderroxin/home" style="color:rgb(5,99,193)">https://sites.google.com/site/alexanderroxin/home</a>
at the Centre de Recerca Matemàtica</span><span lang="EN-US"> </span><span lang="EN-US"><a href="https://www.crm.cat/_neuroscience/" style="color:rgb(5,99,193)">https://www.crm.cat/_neuroscience/</a>
is looking for a postdoctoral researcher
to work on models of the formation and long-term dynamics of memories in the Hippocampus.
This project is a collaboration with the Wang lab at the Max Planck Florida Institute
for Neuroscience <a href="https://mpfi.org/science/our-labs/wang-lab/" style="color:rgb(5,99,193)">https://mpfi.org/science/our-labs/wang-lab/</a>
in the framework of the CRCNS program, to study the role of acetylcholine in memory
formation. </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-US">The postdoctoral
candidate should have strong quantitative skills. The theoretical side of the
project will involve data analysis, modelling, and analytical and numerical
analysis of the model. Yearly meetings between the two groups will be held in
Barcelona and Florida. The postdoctoral researcher will be expected to spend a
brief period of time, dates and duration to be determined, at the Wang Lab in
Florida. The project officially ends in November 2026 and hence the position
can be for a maximum of three years, although this depends on the start date.</span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span lang="EN-US">Interested
and highly motivated applicants should send a CV, cover letter and up to three
letters of recommendation to Alex Roxin at <a href="mailto:aroxin@crm.cat" style="color:rgb(5,99,193)">aroxin@crm.cat</a>.
Please specify your availability for the start date in the application. Applications
will be accepted until the position is filled. </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><u><span lang="EN-US">Project
Summary:</span></u></p>
<p class="MsoNormal" style="margin:0cm;line-height:normal;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-US"> Nearly a
century of clinical and experimental work has shown the hippocampus to be
crucial for enabling us to find our way around an environment (spatial memory)
and remembering events that occur in our lives (episodic memory). Yet, the
neuronal mechanisms underlying the formation and retention of these memories
remain largely unknown. The hippocampus receives various neuromodulatory
inputs. Among them, cholinergic inputs are critical for forming new memories
and regulating memory stability. Cholinergic innervation of the hippocampus
progressively degenerates in patients with Alzheimers disease, and the neuronal
response to acetylcholine weakens with aging. Thus, addressing how cholinergic
activity mediates changes at the cellular, circuit, and behavior levels as
memory forms and stabilizes is key to understanding mnemonic processing in
health and disease. Ample in vitro evidence suggests muscarinic acetylcholine
receptors (mAChRs) modulate synaptic plasticity -- the molecular correlate of
learning and memory. However, in vivo evidence for the role of mAChRs in
shaping neuronal dynamics during learning remains scarce. In the hippocampal
CA1</span></i></p>
<p class="MsoNormal" style="margin:0cm;line-height:normal;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-US">region,
mAChRs are expressed in multiple cell types and cellular compartments, making
it difficult to decipher the contribution of individual elements to the overall
network effects of acetylcholine. In CA1 pyramidal neurons, mAChRs are densely
clustered at the proximal dendrites, co-localized with the CA3 inputs that
convey information about the stored memory. These receptors are ideally
situated to modulate pyramidal neurons response to CA3</span></i></p>
<p class="MsoNormal" style="margin:0cm;line-height:normal;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-US">inputs
and to shape neuronal dynamics through synaptic plasticity. In this project, we
hypothesize that mAChRs located on CA1 pyramidal neurons mediate both the
formation and stability of the memory-related dynamical activity patterns
generated by these neurons. To test this hypothesis, we combine theoretical
modeling with in vivo experiments that leverage</span></i></p>
<p class="MsoNormal" style="margin:0cm;line-height:normal;font-size:11pt;font-family:Calibri,sans-serif"><i><span lang="EN-US">newly
developed neuropharmacological tools to target muscarinic acetylcholine
receptors with cell-type specificity. Our objective is to elucidate the cholinergic
control of plasticity over two distinct stages of the memory process memory
formation and stability across multiple levels from cell-typespecific acetylcholine
receptors to the development of memory-related neuronal dynamics, and finally
to the refinement of behavior.</span></i></p><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div><div><div><div>Alex Roxin<br></div>Computational Neuroscience Group<br></div>Centre de Recerca Matemàtica<br></div>Campus de Bellaterra, Edifici C<br></div>08193 Bellaterra (Barcelona)<br></div><a href="https://sites.google.com/site/alexanderroxin/home" target="_blank">https://sites.google.com/site/alexanderroxin/home</a><br></div></div></div></div></div>