Thursday, January 17, 2019

Postdoc position available in the O-Lab at Duke University


We are looking for a highly motivated early-career scientist to join the O-Lab, led by Prof. Tobias Overath, in the Department of Psychology & Neuroscience at Duke University. Work in our lab investigates how sounds, from simple sinusoids to complex speech signals, are processed in the human brain, using a combination of behavioral (psychoacoustics) and neuroimaging methods (fMRI, EEG, ECoG) to track the underlying neural processes. Current projects investigate the transformation from acoustic to linguistic analysis of temporal speech structure, online measures of statistical learning, and optimization of cochlear implant coding strategies. 

Applicants should have recently completed a graduate degree in auditory neuroscience (broadly construed) or a related field, ideally using neuroimaging techniques (fMRI, M/EEG, ECoG). Strong computational skills are essential (Matlab, Python), as are good interpersonal skills and the ability to work in a research team. Interested candidates should have established a track record of publications from their graduate studies and demonstrated the motivation to pursue a successful career in science and academia.

Duke University provides a vibrant, highly connected scientific environment, with many relevant departments and interdisciplinary initiatives (e.g. Departments of NeurobiologyBiomedical Engineering,Electrical and Computer EngineeringCenter for Cognitive Neuroscience,Duke Institute for Brain SciencesBrain Imaging and Analysis Center). In addition, the Research Triangle area (Durham, Chapel Hill, Raleigh) boasts a wealth of research initiatives.

Applications will be reviewed until February 15, 2019, or until the position is filled. The prospective start date is August 2019. Interested candidates should contact Tobias Overath informally via email: t.overath@duke.edu

Tuesday, January 15, 2019

PhD scholarship/stipends: Language, Cognition and Brain Sciences Laboratory Queensland University of Technology (QUT), Brisbane, Australia.

Applications are invited for PhD scholarship/stipends for projects with the Language, Cognition and Brain Sciences Laboratory (http://www.langcogbrain.net) at Queensland University of Technology (QUT), Brisbane, Australia.

Research in the lab makes use of a range of methodologies, including magnetic resonance imaging (MRI), electrophysiology (intracranial and scalp-recorded EEG), transcranial magnetic and direct current stimulation (TMS & tDCS), and behavioural paradigms, in both healthy and neurologically disordered populations. Current projects involve research into the cognitive and neural mechanisms of healthy language production and comprehension, intracranial EEG in candidates for epilepsy surgery, and aphasia following stroke and surgery for brain tumours in children and adults.

Applicants interested in the PhD scholarships should discuss potential projects with Prof Greig de Zubicaray (greig.dezubicaray@qut.edu.au), Assoc Prof Katie McMahon (k21.mcmahon@qut.edu.au)  and Dr Sonia Brownsett (sonia.brownsett@qut.edu.au) before submitting an application. Candidates should have an excellent written and spoken command of English.

How to apply:
Applicants need to apply by 15 February 2019 (AEST).

Eligible applicants will:

  • have completed a postgraduate qualification from the United Kingdom, European Union, Switzerland, Norway, Russian Federation, Canada and United States of America
  • the postgraduate qualification must have been administered and assessed in English and must include a significant research component and thesis (at least 25 percent of the total degree).

Successful scholarship applicants will receive a:

  • living stipend valued at AU$27,596pa in 2019 and indexed annually
  • applicants meeting criteria for academic excellence are eligible for an additional top-up scholarship at AU$5,000pa
  • tuition fees offset or sponsorship
  • research support allowance of AU$4,500
  • opportunity to apply for Grant-in-Aid travel funding up to AU$2,000

For information, please visit: https://www.seek.com.au/job/38102426

Further information:

Please contact our Research Services Office if you have any questions about our courses and scholarships:

phone +61 (0)7 3138 8290 or email health.research@qut.edu.au

Thursday, December 20, 2018

ASSISTANT PROFESSOR IN LANGUAGE NEUROSCIENCE AT THE UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT HOUSTON


As part of our new and expanding Texas Epilepsy Neurotechnologies and Neuroinformatics Institute (TENN), at the University of Texas Health Science Center at Houston (UTHealth – https://www.uth.edu), we invite applications for an Assistant Professor (tenure-track) position in Language Neuroscience.

We are looking for candidates who are interested in questions regarding language processing in cortical regions using systems-level approaches and/or computational methods. We are especially interested in individuals who currently use or are interested in multimodal integration approaches to the study of language via fMRI, MEG, DTI, brain mapping by direct cortical stimulation and electrocorticography.

This position is part of an initiative at UTHealth focused on expanding expertise in language processing and computation. Collaborations with other language experts within UTHealth as well as with other institutions locally and around the country, will be encouraged.

The successful candidate will be situated in either the Department of Neurosurgery (https://med.uth.edu/neurosurgery) or the Department of Neurobiology and Anatomy (https://med.uth.edu/nba/), and will also be cross-appointed at Rice University.

RESPONSIBILITIES: The successful candidate will be expected to create and sustain an independent research program, including planning, supervising and directing language-based research. This includes the development of study design, data collection, data analysis, results interpretation, manuscript writing and grant proposal preparation. The candidate will have the opportunity to train and supervise undergraduate, graduate and MD/PhD students at UTHealth and Rice University.

QUALIFICATIONS: Candidates must possess a Ph.D. in Cognitive Neuroscience or a related field (post-doctoral experience preferred). A record of verifiable and published research, the potential to obtain extramural, peer-reviewed funding, and excellent teamwork and communication skills are also required.

HOW TO APPLY:  Please write to us with your CV. A formal application will be submitted through UT Health’s online system. As part of the application process, the candidate should provide a cover letter describing qualifications and career goals, a curriculum vita, a research statement, and contact information for three referees and a cover letter describing qualifications and career goals.

SALARY: Highly competitive, dependent upon qualifications and experience. Start-up packages will also be provided.

Tuesday, December 18, 2018

Post-doctoral position: Sensory-motor interactions in typical speech production and stuttering


 The Laboratory for Speech Physiology and Motor Control (PI Ludo Max, Ph.D.) at the University of Washington (Seattle) announces an open post-doctoral position in the area of sensorimotor interactions in the control of speech movements by typical children and adults as well as individuals who stutter. The lab is located in the University of Washington's Department of Speech and Hearing Sciences and has additional affiliations with the Graduate Program in Neuroscience and the Department of Bioengineering. See http://faculty.washington.edu/ludomax/lab/ for more information.

The successful candidate will use electroencephalography (EEG) to investigate predictive aspects of speech movement planning and motor-to-sensory priming prior to speech initiation. Additional opportunities are available to conduct studies of sensorimotor learning in the same populations of participants.

The position is initially for one year (a second-year extension is possible contingent upon satisfactory performance and productivity) with a preferred starting date in the winter or spring of 2019. Applicants should have the Ph.D. degree by the start of the appointment. Review of applications will begin immediately. Candidates with a Ph.D. degree in neuroscience, cognitive/behavioral neuroscience, motor control/kinesiology, biomedical engineering, communication disorders/speech science, and related fields, are encouraged to apply.

We seek a candidate with excellent verbal and written communication skills who is strongly motivated and has substantial computer programming experience (in particular MATLAB and R).

For more information, please contact lab director Ludo Max, Ph.D. (LudoMax@uw.edu). Applications can be submitted to the same e-mail address. Interested candidates should submit (a) a cover letter describing their research experiences, interests, and goals, (b) a curriculum vitae, (c) the names and contact information of three individuals who can serve as references, and (d) reprints of relevant journal publications.

The University of Washington is an affirmative action and equal opportunity employer. All qualified applicants will receive consideration for employment without regard to, among other things, race, religion, color, national origin, sex, age, status as protected veterans, or status as qualified individuals with disabilities.


Friday, December 7, 2018

Maps and Streams, Vocal Learning, and the Anatomy of Speech

The dual stream model of speech processing--originally proposed by Carl Wernicke in 1874 and modernized by me and David Poeppel in a series of three publications in 2000, 2004, and 2007--has become, it seems, the standard model of the field. It holds that speech processing is achieved along two task-dependent streams: a dorsal "how" stream important for speech production and a ventral "what" stream important for speech recognition.

Of course there is disagreement on the details, which is a healthy thing. The most prominent disagreement comes in the form of an alternative formulation by Rauschecker and Scott in a 2009 publication.  I commented on the problems with their proposal in a previous post. Here I want to highlight and discuss the main functional anatomic disagreement, which concerns the branching point of the two streams.  Rauschecker's monkey work suggests an early (A1) divergence, as this figure from R&S indicates:

An external file that holds a picture, illustration, etc.
Object name is nihms147975f1.jpg

R&S, sticking close to the monkey anatomy, translate that into a human architecture with the same branch point, meaning that everything ~caudal to A1 is dorsal and everything ~rostral to A1 is ventral.



In contrast, we've argued that the branch point is fairly deep into the system, in the vicinity of the pSTS (yellow phonological network in figure) or caudal parabelt in monkey auditory cortex anatomy terms:



The evidence for this comes from a variety of sources (neuropsych, imaging) that we have recited again and again in various publications. I won't rehash it here. For some recent evidence for an "auditory phonological area" that is consistent with the H&P proposal, see this Twitter thread.

An advantage of the R&S view is that it can be viewed as more parsimonious or conservative in the evolutionary sense, sticking closer to the anatomy as it is understood in the monkey. I think this is a reasonable tack. The question, then, is whether there is empirical justification for a different architecture in the human. My long-time position on this is that the empirical evidence is overwhelming and therefor justifies a different architecture in humans compared to macaques.
but here I want to step back and consider some functional-behavioral arguments that I think reconcile to some extent the R&S and H&P viewpoints and show that they are not all that different after all.

The basic insight is that the auditory-motor repertoire of monkeys and humans is dramatically different. There is general agreement that the vocal-learning capacities of monkeys is limited whereas humans are arguably the most prodigious vocal learners in the animal kingdom. What this means is that the auditory-motor repertoire of monkeys is going to be limited to relatively simple behaviors like orienting to sound and not to behaviors where the perceived sound must be reproduced by the monkey. Perhaps it is no surprise that the monkey dorsal stream, in Rauschecker's hands (cf, Middlebrooks), is spatial perception oriented.

Speech is different. The phonological form of a word must be used both as a means to access the meaning of the word, a ventral stream "what" function, and as a target for a motor speech action, a dorsal stream "how" function.  Now, look back at the first figure in this post and play natural selection for a moment. If you were going to evolve a network that could represent higher-level information about word forms AND use them in both ventral and dorsal streams, where would you put such a network? A good candidate is the lighter shaded area just ventrolateral to A1 and extending posterior from there. This is the yellow shaded box/area in the H&P figure, the "Mid-post STS", which in our model is part of both the ventral and dorsal streams.  R&S assign this zone as part of the dorsal stream (red in their human architecture figure) but they acknowledge some interaction between that posterior zone and the more anterior portion of their ventral stream, as the arrow in their figure indicates.

What I'd like to communicate with these points is that (1) the H&P model architecture is perfectly consistent the monkey architecture assuming some reasonable evolutionary expansions, (2) R&S assume a similar expansion into that same zone in humans, meaning that (3) the two models are not really that different at this level: H&P refer to the mid-posterior zone as part of both streams whereas R&S call it part of the dorsal stream that nonetheless interacts with both streams.

Conclusion: perhaps there is more agreement about the details of the dual stream architecture than the pictures and claims suggest.