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The Impact of Long-term Isolation in Antarctica on Social Touch and Its Underlying Biological Mechanisms in Winter-over Crew Members, Assessed During Their Stay Using Standardized Touch Stimulation, Computer-based Touch Sensitivity Tests, Questionnaires and Biological Markers. (TACTICE)

28 września 2026 zaktualizowane przez: Vrije Universiteit Brussel

Touching the Void: An Investigation Into the Role of a Population of Gentle Touch-Sensitive C-Tactile Afferents in Social Isolation and Somatosensory Deprivation During a Long-Duration Antarctic Stay.

TACTICE investigates how long-term isolation and reduced social touch during an Antarctic winter-over affect the way people perceive and respond to touch. The study will follow winter-over crew members at Concordia Station in Antarctica during the 2027 and 2028 seasons.

The study focuses on so-called C-tactile (CT) sensitivity. CT afferents are specialized nerve fibers in the skin that are known to be involved in the pleasant and regulatory effects of social touch. They may also play a role in how prolonged social isolation affects people during a long-term mission in an isolated, confined, and extreme (ICE) environment.

Participants will be assessed repeatedly before, during and after their stay. CT sensitivity will be measured using standardized touch stimulation and computer-based tasks involving touch-related stimuli. Participants will also complete questionnaires on social touch, loneliness, stress, relationships and coping. Saliva and blood samples will be collected to measure biological markers related to stress regulation and social processes, including cortisol and oxytocin.

The main hypothesis is that prolonged isolation and reduced opportunities for social touch change CT sensitivity and reduce an important source of stress regulation. These changes are expected to become more pronounced with time spent at the station and to be related to changes in stress responses, behaviour, attitudes and interpersonal functioning. The study aims to improve understanding of how people adapt to prolonged isolation and confinement and may help inform the planning of future long-duration missions in remote and extreme environments, including space missions.

Przegląd badań

Status

Jeszcze nie rekrutacja

Warunki

Interwencja / Leczenie

Typ studiów

Obserwacyjny

Zapisy (Szacowany)

28

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kopia zapasowa kontaktu do badania

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

18 lat i starsze (Dorosły, Starszy dorosły)

Akceptuje zdrowych ochotników

Nie

Płeć kwalifikująca się do nauki

Wszystko

Metoda próbkowania

Próbka bez prawdopodobieństwa

Badana populacja

Winter-over Crew members in Concordia Station in Antarctica

Opis

Inclusion Criteria:

  • Member of the Concordia Station winter-over crew for the 2027 or 2028 Antarctic winter-over season and willing to participate in the study.

Exclusion Criteria:

  • No study-specific exclusion criteria.

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Modele obserwacyjne: COHORT
  • Perspektywy czasowe: PROSPECTIVE

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Change in experiential C-tactile (CT) sensitivity assessed by pleasantness and intensity ratings on a Visual Analog Scale ranging from -10 to +10 using the Manual Tactile Stimulator.
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Experiential CT sensitivity will be assessed using standardized stroking touch, delivered with a mechanic Manual Tactile Stimulator tool to the forearm and palm at three velocities (0.3, 3, and 30 cm/s), using smooth and ribbed probe surfaces. Participants rate perceived pleasantness and intensity on a Visual Analog Scale ranging from -10 to +10. Changes in VAS scores across repeated assessments will be used to characterize experiential CT sensitivity over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in vicarious C-tactile (CT) sensitivity assessed by pleasantness and intensity ratings on a Visual Analog Scale ranging from -10 to +10 using the Vicarious Touch Task
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Vicarious CT sensitivity will be assessed using standardized 6-second videos depicting interpersonal touch at different body locations and velocities. Participants rate the perceived pleasantness and intensity of the observed touch on a Visual Analog Scale ranging from -10 to +10. Changes in ratings across repeated assessments will be used to characterize vicarious CT sensitivity over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Change in behavioral C-tactile (CT) sensitivity assessed by interpersonal space boundary using the Footstep Task with response time in milliseconds (ms).
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Interpersonal space boundary will be assessed using an auditory stop-distance paradigm. Participants listen to approaching footsteps and press a key when the approaching person makes them feel uncomfortable. The outcome measure is the response time in milliseconds (ms) from stimulus onset to the stop response. Changes in response time across repeated assessments will be used as an indirect behavioral measure associated with CT sensitivity.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in neurobiophysiological C-tactile (CT) sensitivity assessed by salivary cortisol concentration (µg/L) measured by saliva sampling and analyses
Ramy czasowe: Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Salivary cortisol concentration concentration will be measured as a neuroendocrine marker of HPA-axis stress regulation associated with C-tactile (CT)-mediated touch. Saliva samples are collected on one combined sampling evening and morning per month. One sample is collected before bedtime and three samples are collected in the following morning: immediately after awakening, 30 minutes after awakening, and 60 minutes after awakening. Cortisol concentrations (µg/L) and the cortisol awakening response (CAR) will be evaluated across repeated assessments over time.

Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in neurobiophysiological C-tactile (CT) sensitivity assessed by plasma oxytocin concentration (pg/ml) measured by blood sampling and analyses
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Plasma oxytocin concentration will be measured from blood samples as a neuroendocrine marker associated with affiliative social touch and the rewarding neurobiology of C-tactile (CT)-mediated touch. Changes in plasma oxytocin concentration (pg/ml) will be evaluated across repeated assessments over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in psychosocial and behavioral characteristics associated with C-tactile (CT) sensitivity assessed using standardized questionnaires with total and/or subscale questionnaire scores.
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Psychosocial and behavioral characteristics will be assessed using the Touch Experiences and Attitudes Questionnaire - short version (TEAQ-s), Brief COPE, UCLA Loneliness Scale, Experiences in Close Relationships - Short Form (ECR-S), and State-Trait Anxiety Inventory (STAI). These questionnaires assess social touch experiences and attitudes, coping strategies, loneliness and social isolation, attachment anxiety and avoidance, and state/trait anxiety, respectively. The outcome measures are the total and/or subscale questionnaire scores, calculated according to the scoring procedures of each instrument. Changes in these scores will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in behavioral and psychosocial adaptation associated with C-tactile (CT) sensitivity assessed using the 15-item ICE-Psychosocial Monitoring Scale with scores on a Visual Analog Scale (VAS-score 0-10).
Ramy czasowe: Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Psychosocial adaptation during isolation and confinement will be assessed using the 15-item VAS-based ICE-Psychosocial Monitoring Scale. The scale assesses physical touch deprivation/contact need, social contact and interpersonal connection, situational/temporal loneliness, attachment and separation distress, and somatic self-soothing/physical regulation. Changes in VAS-based scores will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in tactile sensory performance associated with C-tactile (CT) sensitivity measured with the Brain Gauge Tactile Reaction Time Test (TRTT) using reaction-time and discrimination outcomes.
Ramy czasowe: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Tactile sensory performance will be assessed using the Brain Gauge TRTT, a mouse-like device that delivers gentle tactile vibrations to the fingertips. The test battery includes simple reaction time, amplitude discrimination, temporal order judgment, and duration discrimination. Time-related outcomes will be expressed in milliseconds (ms). Changes in reaction-time and discrimination measures will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

Współpracownicy

Publikacje i pomocne linki

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Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Szacowany)

1 października 2026

Zakończenie podstawowe (Szacowany)

1 lutego 2031

Ukończenie studiów (Szacowany)

1 lutego 2031

Daty rejestracji na studia

Pierwszy przesłany

7 września 2026

Pierwszy przesłany, który spełnia kryteria kontroli jakości

28 września 2026

Pierwszy wysłany (Rzeczywisty)

5 października 2026

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

5 października 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

28 września 2026

Ostatnia weryfikacja

1 sierpnia 2026

Więcej informacji

Terminy związane z tym badaniem

Dodatkowe istotne warunki MeSH

Inne numery identyfikacyjne badania

  • EC-2026-106

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

NIE

Opis planu IPD

Individual participant data are not planned to be shared with researchers outside the study consortium and sponsoring organizations. Study findings will be disseminated through scientific publications and presentations.

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

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