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      <nav class="breadcrumb" aria-label="Breadcrumb"><a href="index.html">Home</a> &nbsp;/&nbsp; Psychophysiology</nav>
      <span class="kicker">Human Psychophysiology &amp; Neuroimaging Laboratory</span>
      <h1>Human Psychophysiology Laboratory</h1>
      <p class="lede">Three dedicated testing rooms for measuring the body's response to pain, emotion, and social interaction — combining multi-participant autonomic recording, thermal quantitative sensory testing, and video-based behavioral decoding.</p>
      <span class="maintainer">Maintained by the <a href="https://sites.dartmouth.edu/canlab" target="_blank" rel="noopener">Wager Lab (CANlab)</a> · Shared on request</span>
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  <!-- ============ OVERVIEW SPLIT ============ -->
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          <span class="eyebrow">The lab</span>
          <h2>A dedicated psychophysiology facility</h2>
          <p class="prose" style="color:var(--text-soft)">The Human Psychophysiology &amp; Neuroimaging Laboratory maintains three dedicated testing rooms purpose-built for peripheral physiology and pain research. The rooms are electromagnetically shielded and soundproofed, providing a controlled environment for clean autonomic recordings and for video monitoring that feeds machine-learning models of facial expression and movement.</p>
          <p class="prose" style="color:var(--text-soft)">The facility couples multi-participant BIOPAC recording with a deep suite of somatosensory and pain-testing hardware, supporting everything from single-subject quantitative sensory testing to interpersonal-interaction studies with up to three participants recorded simultaneously.</p>
          <ul class="spec-list" style="margin-top:1.5rem;">
            <li><strong>Testing rooms:</strong> three dedicated spaces, EM-shielded &amp; soundproofed</li>
            <li><strong>Autonomic recording:</strong> BIOPAC MP160 — three stations, up to 3 participants at once</li>
            <li><strong>Somatosensory:</strong> Medoc TSA2 &amp; QSTlabs thermal systems, plus pressure and pinprick devices</li>
            <li><strong>Thermal imaging:</strong> FLIR thermal camera for non-contact facial/skin temperature measurement</li>
            <li><strong>Behavioral:</strong> video capture for facial &amp; movement decoding</li>
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            <img src="images/peripheral-biopac.png" alt="BIOPAC MP160 data-acquisition system" />
            <figcaption>A BIOPAC MP160 acquisition unit — the lab operates three such stations for simultaneous multi-participant recording.</figcaption>
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  <!-- ============ DYADIC PSYCHOPHYSIOLOGY ============ -->
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        <span class="eyebrow" data-reveal>Autonomic physiology</span>
        <h2 data-reveal data-reveal-delay="1">Dyadic psychophysiology</h2>
        <p class="lede" data-reveal data-reveal-delay="2">Three BIOPAC MP160 stations record synchronized physiology from up to three participants at once — enabling interpersonal-interaction and hyperscanning-style designs across multiple bodily systems.</p>
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          <h4>Cardiac</h4>
          <p>Heart rate via electrocardiography (ECG) and photoplethysmography (PPG).</p>
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          <h4>Electrodermal</h4>
          <p>Skin conductance (electrodermal activity) as an index of sympathetic arousal.</p>
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          <h4>Respiration</h4>
          <p>Breathing measured with a respiration belt and a nasal cannula.</p>
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          <h4>TREV</h4>
          <p>Trans-radial electrical bioimpedance velocimetry for continuous cardiovascular dynamics.</p>
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          <h4>Thermal imaging</h4>
          <p>A FLIR thermal camera captures facial and skin temperature without contact, adding a non-invasive autonomic channel.</p>
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          <h4>Up to 3 participants</h4>
          <p>Three MP160 stations record multiple people simultaneously for interpersonal-interaction studies.</p>
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          <h4>Synchronized acquisition</h4>
          <p>All channels time-locked for cross-person and cross-system analysis.</p>
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  <!-- ============ BIOPAC WIRING DIAGRAM ============ -->
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            <img src="images/diagram-biopac-psychophysiology.png" alt="BIOPAC MP160 wiring diagram showing EDA, PPG, and ECG channels routed to the scanner, Medoc, and EyeLink systems" />
            <figcaption>Facility wiring for a BIOPAC MP160 station — EDA, PPG, and ECG channels routed alongside the Prisma scanner, Medoc thermal stimulator, and EyeLink eye tracker.</figcaption>
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          <span class="eyebrow">Integration</span>
          <h2>Built to synchronize with imaging &amp; stimulation</h2>
          <p class="prose" style="color:var(--text-soft)">The lab's BIOPAC configuration is designed to interoperate with the wider DBIC ecosystem. Physiology channels can be recorded alongside MRI acquisition on the Siemens Prisma, aligned to thermal stimulation delivered by the Medoc systems, and co-registered with gaze from the EyeLink tracker — so autonomic, neural, and behavioral signals share a common timeline.</p>
          <ul class="spec-list" style="margin-top:1.5rem;">
            <li><strong>Physiology core:</strong> BIOPAC MP160 acquisition units</li>
            <li><strong>Channels:</strong> EDA, PPG, ECG, respiration, TREV</li>
            <li><strong>Thermal imaging:</strong> FLIR non-contact facial/skin temperature</li>
            <li><strong>Aligns with:</strong> Prisma MRI, Medoc thermal stimulation, EyeLink gaze</li>
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  <!-- ============ QST & PAIN ============ -->
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          <span class="eyebrow">Somatosensory &amp; pain</span>
          <h2>Quantitative sensory testing &amp; pain</h2>
          <p class="prose" style="color:var(--text-soft)">The lab houses an unusually deep set of somatosensory stimulators, anchored by six computer-controlled thermal systems for precise heat and cold delivery. Together with custom mechanical devices, they support quantitative sensory testing (QST) and paradigms that probe endogenous pain modulation, including dual stimulation for conditioned pain modulation.</p>
          <ul class="spec-list" style="margin-top:1.5rem;">
            <li><strong>Medoc TSA2 ×4:</strong> computer-controlled thermal stimulation (heat/cold)</li>
            <li><strong>QSTlabs ×2:</strong> additional thermal quantitative sensory testing systems</li>
            <li><strong>Pressure pain:</strong> custom pressure-pain stimulation devices</li>
            <li><strong>Pinprick:</strong> calibrated mechanical pinprick stimulation</li>
            <li><strong>Evoked back pain:</strong> custom devices for evoked back-pain paradigms</li>
            <li><strong>Dual stimulation / CPM:</strong> supports conditioned pain modulation designs</li>
            <li><strong>QST:</strong> standardized quantitative sensory testing protocols</li>
          </ul>
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            <img src="images/diagram-biopac-psychophysiology.png" alt="Thermal and physiology stimulation setup routed through the psychophysiology laboratory" />
            <figcaption>Thermal stimulators integrate with the same acquisition backbone, allowing pain delivery to be time-locked to physiology and imaging.</figcaption>
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  <!-- ============ FACIAL / MOVEMENT DECODING + EEG ============ -->
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        <span class="eyebrow" data-reveal>Behavior &amp; brain</span>
        <h2 data-reveal data-reveal-delay="1">Facial decoding, movement &amp; EEG</h2>
        <p class="lede" data-reveal data-reveal-delay="2">Beyond autonomic physiology, the shielded rooms support video-based behavioral decoding and rapid-setup EEG for combined peripheral-and-central recording.</p>
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          <h4>Video monitoring</h4>
          <p>Continuous video capture in every testing room for objective, camera-based behavioral measurement.</p>
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          <h4>Facial &amp; movement decoding</h4>
          <p>Recordings feed machine-learning models that decode facial expression and body movement.</p>
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          <h4>Shielded &amp; quiet</h4>
          <p>Electromagnetic shielding and soundproofing keep both physiology and video data clean.</p>
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          <h4>Rapid-setup EEG</h4>
          <p>Four 20-channel wet-electrode systems for fast-mounting EEG in dyadic and pain studies.</p>
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          <h4>Fast turnaround</h4>
          <p>Rapid-setup electrodes shorten preparation time, easing multi-participant sessions.</p>
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          <h4>Multimodal designs</h4>
          <p>Combine EEG, autonomic physiology, pain stimulation, and video within a single paradigm.</p>
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        <span class="eyebrow" data-reveal>Access</span>
        <h2 data-reveal data-reveal-delay="1">Part of the CANlab</h2>
        <p class="lede" data-reveal data-reveal-delay="2">The Human Psychophysiology &amp; Neuroimaging Laboratory is part of Tor Wager's Cognitive and Affective Neuroscience Laboratory (CANlab). Lab equipment and facilities are shared on request — researchers interested in dyadic physiology, quantitative sensory testing, or pain paradigms are encouraged to reach out to discuss study design, scheduling, and equipment availability.</p>
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      <div class="callout" data-reveal><strong>CANlab:</strong> <a href="https://sites.dartmouth.edu/canlab" target="_blank" rel="noopener">sites.dartmouth.edu/canlab</a> · Moore Hall, Hanover, NH. Access is shared on request; specific equipment configurations and protocols to be confirmed with lab staff.</div>
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        <a class="btn btn-primary btn-arrow" href="https://sites.dartmouth.edu/canlab" target="_blank" rel="noopener">Visit the CANlab</a>
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