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Effects of Optokinetic Stimulation Without a Reading Task in Patients With Hemianopic Alexia (OPTO)

2026年9月15日 更新者：Clinique Les Trois Soleils

The goal of this clinical trial is to investigate whether optokinetic stimulation delivered without a reading task can improve reading performance in adults with post-stroke hemianopic alexia. The main question it aims to answer is: does optokinetic stimulation without a reading task improve reading speed more than optokinetic stimulation with a reading task? Optokinetic stimlation with a reading task is considered the standard rehabilitation. These two conditions will be administered according to a randomized crossover design to determine wether the presence or absence of a reading task influences reading outcomes.

Participants will

  • receive 4 weeks of optokinetic stimulation without a reading task and 4 weeks of optokinétic stimulation with a reading task, with the order of these two interventions determined by randomization,
  • undergo assesments of reading performance, oculomotor behavior, visual field and rehabilitation tolerability before and after each intervention period,
  • undergo a follow-up assesment 1 month after completion of the interventions.

調査の概要

状態

まだ募集していません

条件

介入・治療

詳細な説明

Stroke can cause a visual field defect known as homonymous hemianopia (HH). When this visual field loss involves the macula, the central area of vision, it may result in reading difficulties known as hemianopic alexia (HA).

The literature reports improved reading performance in these patients after repeated induction of horizontal optokinetic nystagmus (i.e., an oculomotor reflex consisting of horizontal saccades). To induce this nystagmus, previous studies have used a reading task involving text scrolling from right to left.

However, this type of exercise, which relies on reading, is cognitively demanding and may lead to frustration due to reading difficulties, fatigue, and reduced motivation and potentially the impact of rehabilitation. Therefore, the use of a non-reading task could help overcome these limitations.

The present study aims to compare the efficacy of optokinetic stimulation with reading to optokinetic stimulation without reading in patients with HA.

研究の種類

介入

入学 (推定)

30

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究連絡先のバックアップ

研究場所

  • フランス
    • Île-de-France Region
      • Boissise-le-Roi、Île-de-France Region、フランス、77310
        • Clinique Les Trois Soleils
        • コンタクト：
        • 主任研究者：
          • Christophe Duret

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

18年歳以上 (大人、高齢者)

健康ボランティアの受け入れ

いいえ

受講資格のある性別

全て

説明

Inclusion Criteria:

  • Time since lesion > 1 month
  • Diagnosis of homonymous hemianopia post-stroke without macular sparing
  • Reading complaint and/or reading impairment
  • Proficiency in reading French
  • Agreed to give informed consent
  • Afiliated with national health insurance

Exclusion Criteria:

  • History of neurological or psychiatric disorders
  • Visual impairment of peripheral origin (i.e., related to damage to the structures of the eye or the optic nerve)
  • Uncorrected visual acuity deficit
  • Reading disorder prior to the stroke (dyslexia)
  • Instability of reading impairment
  • Instability of homonymous hemianopia
  • Major cognitive that would limit the ability of the patient to participate in the study (unilateral spatial neglect, simultanagnosia, comprehension disorder, oral expression disorder)

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：処理
  • 割り当て：ランダム化
  • 介入モデル：クロスオーバー割り当て
  • マスキング：独身

武器と介入

参加者グループ / アーム
介入・治療
他の：Group A

Patients receive 15 sessions of optokinetic rehabilitation with a reading task, followed by 15 sessions of optokinetic rehabilitation without an associated reading task.

The optokinetic rehabilitation sessions with reading are considered the standard of care, while optokinetic rehabilitation without an associated reading task is the experimental condition. Each patient undergoes both conditions sequentially and serves as their own control.
他の：Optokinetic stimulation without reading task

Participants are exposed to a horizontally moving optokinetic visual stimulus on a computer screen for 40 minutes per session. The task consists of viewing random sequences of letters scrolling from right to left. The sessions are spread out over 4 weeks, with 3 or 4 sessions per week, to achieve 10 hours (15 sessions) of optokinetic rehabilitation.

他の：Optokinetic stimulation with reading task

Participants are exposed to a horizontally moving optokinetic visual stimulus on a computer screen for 40 minutes per session. The task consists of reading aloud sentences scrolling from right to left. The sessions are spread out over 4 weeks, with 3 or 4 sessions per week, to achieve 10 hours (15 sessions) of optokinetic rehabilitation. The scrolling speed ranges from 85 to 275 words per minute, depending on the participant's reading accuracy.
他の：Group B

Patients receive 15 sessions of optokinetic rehabilitation without an associated reading task, followed by 15 sessions of optokinetic rehabilitation with a reading task.

The optokinetic rehabilitation sessions with reading are considered the standard of care, while optokinetic rehabilitation without an associated reading task is the experimental condition. Each patient undergoes both conditions sequentially and serves as their own control.
他の：Optokinetic stimulation without reading task

Participants are exposed to a horizontally moving optokinetic visual stimulus on a computer screen for 40 minutes per session. The task consists of viewing random sequences of letters scrolling from right to left. The sessions are spread out over 4 weeks, with 3 or 4 sessions per week, to achieve 10 hours (15 sessions) of optokinetic rehabilitation.

他の：Optokinetic stimulation with reading task

Participants are exposed to a horizontally moving optokinetic visual stimulus on a computer screen for 40 minutes per session. The task consists of reading aloud sentences scrolling from right to left. The sessions are spread out over 4 weeks, with 3 or 4 sessions per week, to achieve 10 hours (15 sessions) of optokinetic rehabilitation. The scrolling speed ranges from 85 to 275 words per minute, depending on the participant's reading accuracy.

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Change in reading speed on paper
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number of correctly read words per minute, assessed using the International Reading Speed Texts (IReST). For each participant, the change in reading speed will be calculated separately for the optokinetic rehabilitation condition with a reading task and for the optokinetic rehabilitation condition without a reading task. The within-participant changes obtained after each 4-week period will be pooled across the two randomized sequences and compared between conditions. A higher reading speed indicates better reading performance.
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

二次結果の測定

結果測定
メジャーの説明
時間枠
Change in reading accuracy on paper
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number and type of errors (paralexias, omissions) assessed using the International Reading Speed Texts (IReST).
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in reading speed on screen
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number of correctly read words per minute, assessed using a screen-based reading task
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in reading accuracy on screen
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number and type of errors (paralexias, omissions), assessed during a screen-based reading task
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in subjective reading abilities
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the score on the Hemianopia Reading Questionnaire (HRQ)
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in ocular fixations during reading
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number of fixations and in the mean fixation duration (in ms) during the screen-based reading task, assessed with an eyetracker
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in ocular saccades during reading
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in the number and in the mean amplitude of saccades (in degrees) during the screen-based reading task, assessed with an eyetracker
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in optokinetic nystagmus
時間枠：Baseline and at the end of both rehabilitation: Week 0 and Week 8

Change of saccade amplitude and frequency during optokinetic stimulation
Baseline and at the end of both rehabilitation: Week 0 and Week 8
Change in visual detection during standard perimetry
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in visual sensitivity (in dB) at each tested visual field location on automated static perimetry (Humphrey or Octopus)
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Change in visual detection during screen-based perimetry
時間枠：Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8

Change in number of correctly detected targets and mean reaction time (in ms) at each tested visual field location on screen-based perimetry
Baseline and end of each 4-week rehabilitation period: Week 0, Week 4, and Week 8
Tolerability of rehabilitation
時間枠：Before and after each rehabilitation session

Score of fatigue, stress, and mood induced by the treatment, self-assessed using a numbered visual analogue scale
Before and after each rehabilitation session
Motivation for rehabilitation
時間枠：End of each 4-week rehabilitation period: Week 4 and Week 8

Score obtained on the Situational Motivation Scale
End of each 4-week rehabilitation period: Week 4 and Week 8

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Clinique Les Trois Soleils

協力者

Laboratoire Mémoire Cerveau et Cognition, Boulogne-Billancourt, France

捜査官

  • 主任研究者：Christophe Duret、Clinique Les Trois Soleils, Boissise-le-Roi, France

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

一般刊行物

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年10月1日

一次修了 (推定)

2027年6月1日

研究の完了 (推定)

2027年6月1日

試験登録日

最初に提出

2026年9月15日

QC基準を満たした最初の提出物

2026年9月15日

最初の投稿 (実際)

2026年9月21日

学習記録の更新

投稿された最後の更新 (実際)

2026年9月21日

QC基準を満たした最後の更新が送信されました

2026年9月15日

最終確認日

2026年9月1日

詳しくは

本研究に関する用語

キーワード

追加の関連 MeSH 用語

その他の研究ID番号

  • 2026-A00195-46
  • 26.02108.000598 (その他の識別子：SI (CPP))

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

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いいえ

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