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Sleep Deprivation Has No Effect on Dynamic Visual Acuity in Military Service Members Who Are Healthy

Matthew R. Scherer, Pedro J. Claro, Kristin J. Heaton
DOI: 10.2522/ptj.20120144 Published 1 September 2013
Matthew R. Scherer
M.R. Scherer, PT, PhD, NCS, Military Performance Division, US Army Research Institute of Environmental Medicine, 15 Kansas St, Natick, MA 01760 (USA).
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Pedro J. Claro
P.J. Claro, BA, Military Performance Division, US Army Research Institute of Environmental Medicine.
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Kristin J. Heaton
K.J. Heaton, PhD, Military Performance Division, US Army Research Institute of Environmental Medicine.
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Figures

Figure 1.
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Figure 1.

Change in mean group yaw dynamic visual acuity (DVA) values from time 1 to time 2 (test-retest stability) obtained under rested conditions. Change in mean group yaw DVA values from time 2 to time 3 reflect 26 hours of supervised sleep deprivation (sleep deprivation protocol). Solid line represents active DVA values; dashed line represents passive DVA values. Error bars characterize the collective variance (standard deviations) for measurements at each time point. The Snellen eye chart equivalent scores follow the LogMAR score in parentheses. Note visual acuity is better than 20/20 in all cases. Statistical significance of time effect is denoted with open bracket (P=.0004). As a point of reference, note that functional yaw-plane DVA deficits in patients with vestibular hypofunction have been measured in the range of LogMAR=0.3–0.4, per the findings of Herdman et al.36 PY=passive yaw, AY=active yaw.

Figure 2.
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Figure 2.

Change in mean group dynamic visual acuity (DVA) values from time 1 to time 2 (test-retest stability) obtained under rested conditions. Change in mean group pitch DVA values from time 2 to time 3 reflect 26 hours of supervised sleep deprivation (sleep deprivation protocol). Active, downward-directed (AD) head impulses are depicted with the thin solid line; passive, downward-directed (PD) impulses are depicted with the dashed line; active, upward-directed (AU) impulses are depicted with the bold solid line; and passive, upward-directed (PU) impulses are depicted with the stipple-circle line. Error bars characterize the collective variance (standard deviations) for measurements at each time point. The Snellen Eye Chart equivalent to the LogMAR score is depicted in bold below. Note visual acuity is better than 20/20 in all cases. Statistical significance of time effects is denoted with open brackets. As a point of reference, note that functional yaw-plane DVA deficits in patients with vestibular hypofunction have been measured in the range of LogMAR=0.3–0.4, per the findings of Schubert et al.28

Tables

Table 1.
Table 1.

Yaw Dynamic Visual Acuity: Intraclass Correlation Coefficients (3,1) (95% Confidence Intervals)a

  • ↵a A=active, P=passive, R=right, L=left, 1=first trial, 2=second trial.

Table 2.
Table 2.

Pitch Dynamic Visual Acuity: Intraclass Correlation Coefficients (3,1) (95% Confidence Intervals)a

  • ↵a A=active, P=passive, D=down, U=up, 1=first trial, 2=second trial.

Table 3.
Table 3.

Absolute Yaw Dynamic Visual Acuity Values

Table 4.
Table 4.

Absolute Pitch Dynamic Visual Acuity Values

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Vol 93 Issue 9 Table of Contents
Physical Therapy: 93 (9)

Issue highlights

  • Work Reintegration for Veterans With Mental Disorders
  • Dynamic Plantar Pressure During Loaded Gait
  • Sleep Deprivation and Dynamic Visual Acuity
  • Utilization of Rehabilitation Services by Patients With Amputation in the VA System
  • Effect of Two Different Exercise Regimens on Trunk Muscle Morphometry and Endurance
  • Undetected Pectoralis Major Tendon Rupture
  • Physical Therapist Point-of-Care Decisions in the Military Health Care System
  • Meaning of Occupation, Occupational Need, and Occupational Therapy in a Military Context
  • Returning Service Members to Duty Following Mild Traumatic Brain Injury
  • Role of US Military Physical Therapists in Recent Combat Campaigns
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Sleep Deprivation Has No Effect on Dynamic Visual Acuity in Military Service Members Who Are Healthy
Matthew R. Scherer, Pedro J. Claro, Kristin J. Heaton
Physical Therapy Sep 2013, 93 (9) 1185-1196; DOI: 10.2522/ptj.20120144

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Sleep Deprivation Has No Effect on Dynamic Visual Acuity in Military Service Members Who Are Healthy
Matthew R. Scherer, Pedro J. Claro, Kristin J. Heaton
Physical Therapy Sep 2013, 93 (9) 1185-1196; DOI: 10.2522/ptj.20120144
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