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Polyunsaturated Fatty Acids (PUFA) Status and Cognitive Function in Healthy Young Adults

2. August 2011 aktualisiert von: Northumbria University

The Relationship Between Serum PUFAs and Cognitive Function in Healthy Young Adults

To date, the relationship between omega-3 polyunsaturated fatty acids (n-3 PUFAs) in cognitively intact individuals has only been examined in a limited number of studies; it is at present unknown whether supplementation with n-3 PUFAs can improve cognitive function and mood in this population. Further to this, it still remains to be established whether a relationship exists between peripheral fatty acid status-reflective of dietary n-3 PUFA intake-and cognitive function in this population. The current study therefore aims to address this issue by exploring the relationship between serum PUFAs and specific cognitive functions in a sample of healthy adults. To this end, participants will complete a range of cognitive tasks evaluating performance across the domains of attention, memory and executive function. Self-report mood assessments will be included as secondary measures.

Studienübersicht

Status

Abgeschlossen

Studientyp

Beobachtungs

Einschreibung (Tatsächlich)

283

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

    • Tyne and Wear
      • Newcastle upon Tyne, Tyne and Wear, Vereinigtes Königreich, NE1 8ST
        • Northumbria University

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 35 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

The sample will be drawn from a student and professional population in the Newcastle upon Tyne area in the UK

Beschreibung

Inclusion Criteria:

  • Male/Female
  • 18-35 years
  • Healthy
  • No herbal supplements/prescription medications (excl. contraceptive pill)
  • Non smoker
  • Native English speaker

Exclusion Criteria:

  • BMI ≥ 30

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Simple Reaction Time (Attention)
Zeitfenster: Single visit
The participant was instructed to press the 'space bar' on the laptop keyboard as quickly as possible every time an upwards pointing arrow appeared on screen. Fifty stimuli were presented with an inter-stimulus duration that varied randomly between 1 and 3.5 seconds.
Single visit
Choice Reaction Time (Attention)
Zeitfenster: Single visit
An arrow appeared on the screen pointing to the left or to the right. Participants responded with a left or right key press corresponding to the direction of the arrow. There was a randomly varying inter-stimulus interval of between 1 and 3 seconds for a total of fifty stimuli.
Single visit
Four Choice Reaction Time (Attention)
Zeitfenster: Single visit
A visual representation of the four direction arrow keys of a standard keyboard was presented on screen. The arrows 'lit up' at random on screen until the corresponding key press was made. In all, each arrow was the target stimulus 12 times, forming a total of 48 stimuli for this task in all.
Single visit
Numeric Working Memory (Working Memory)
Zeitfenster: Single visit
Single visit
Alphabetic Working Memory (Working Memory)
Zeitfenster: Single visit
Five random letters (A-Z) were presented sequentially for the participant to hold in memory. This was followed by a series of 30 probe digits (15 targets and 15 distractors) for each of which the participant indicated whether or not it had been in the original series by a simple key press. The task consisted of 3 separate trials.
Single visit
Corsi Blocks Span (Spatial Working Memory)
Zeitfenster: Single visit
In this task nine identical blue squares appeared on screen in non-overlapping random positions. A set number of blocks changed colour from blue to red in a randomly generated sequence. Participants were instructed to repeat the sequence by clicking on the blocks using the mouse and cursor. The task was repeated five times at each level of difficulty. The sequence span increased from 4, until the participant could no longer correctly recall the sequence, resulting in a span measure of nonverbal working memory, calculated by averaging the level of the last five correctly completed trials.
Single visit
3-back Task (Working Memory)
Zeitfenster: Single visit
A continuous string of letters (upper and lower case; inter-stimulus interval of 2.5 seconds) was presented; 45 letters in total with 15 target pairs. For each stimulus, participants were instructed to indicate whether this was the same letter that appeared three letters before.
Single visit
Immediate Word Recall (Episodic Memory)
Zeitfenster: Single visit
A unique set of fifteen words is presented. Words were selected at random from a large bank of words derived from the MRC Psycholinguistic Database matched for word length, frequency, familiarity and concreteness. Stimulus duration was one second, as was the inter-stimulus duration. Following word presentation, the participant was allowed 60 seconds to write down as many of the words as possible.
Single visit
Delayed Word Recall (Episodic Memory)
Zeitfenster: Single visit
The participant was again given 60 seconds to write down as many of the words presented previously as possible.
Single visit
Word Recognition (Episodic Memory)
Zeitfenster: Single visit
The original 15 words plus 15 distractor words were presented one at a time in a random order. For each word the participant indicated whether or not it was included in the original list of words by pressing appropriate 'yes' and 'no' keys as quickly as possible. Stimuli remained on screen until an appropriate response had been made.
Single visit

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Depression, Anxiety and Stress Scale (DASS)
Zeitfenster: Single visit-90 minutes
The DASS is a set of three self-report scales designed to measure the negative emotional states of depression, anxiety and stress. Each of the three DASS scales contains 14 items. Subjects are asked to use 4-point (0-3) severity/frequency scales to rate the extent to which they have experienced each state over the past week. Scores for Depression, Anxiety and Stress (0-42) are calculated by summing the scores for the relevant items, with higher scores indicating higher incidence of negative emotional symptoms. A total score can be derived by adding scores from each of the subscales (0-126).
Single visit-90 minutes

Mitarbeiter und Ermittler

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Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn

1. Juli 2007

Primärer Abschluss (Tatsächlich)

1. September 2008

Studienabschluss (Tatsächlich)

1. September 2008

Studienanmeldedaten

Zuerst eingereicht

24. Februar 2010

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

24. Februar 2010

Zuerst gepostet (Schätzen)

25. Februar 2010

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Schätzen)

2. September 2011

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. August 2011

Zuletzt verifiziert

1. August 2011

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • 16N3

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