Re: “High variability of the subjective visual vertical test of vertical perception, in some people with neck pain – Should this be a standard measure of cervical proprioception?”

Bagust, J.; Docherty, Sharon; Razzak, Rima Abdul

doi:10.1016/j.math.2015.09.011

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…The increased intraindividual variability in rod alignment for SCZ during orientation modulation of visual vertical, in comparison to controls, was greater than the resolution of the recording system (0.50°) and may indicate a clinically functional difference. Increased variability in rod alignment on the RFT has previously been reported in studies on neck pain ( 17 , 18 ), diabetes ( 19 ) and Parkinson’s disease ( 20 ), and may be a general indicator of neurological malfunction ( 21 ). Variability-related results in this study also reveal that there is a subgroup (about 50%) of SCZ who exceeded the upper limit for the reference range of control variability values (Mean + 2SD), having a mean greater by one degree than 2SD of the corresponding control value, indicating that SCZ who fell in this category were inconsistently aligning the rod relative to the frame.…”

Section: Discussionmentioning

confidence: 76%

Symptom severity is associated with leftward lateralization upon contextual modulation of visual vertical in patients with schizophrenia

Razzak

Jahrami²,

Husni³

et al. 2022

Front. Psychiatry

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BackgroundContextual processing dysfunction in patients with schizophrenia (SCZ) is not uniform and task-dependent. In SCZ, studies on the rod and frame test (RFT), which evaluates contextual modulation of verticality perception, are sparse. A main study that utilized a two-alternative forced choice design for judging rod verticality reported equivalent strength of RFT contextual modulation in healthy controls and SCZ. The current study aims to uncover any potential differences in contextual modulation between controls and SCZ with an adjustment method on a computerized RFT.Materials and methodsA total of 17 healthy controls and 15 SCZ aligned an oriented rod to their perceived vertical with a computer mouse under four randomized frame presentations: absent frame, non-tilted (Frame0°), or tilted by 18 degrees leftward (Frame–18°) or rightward (Frame+18°). Rod deviation error was assigned a negative or positive value when aligned leftward or rightward, respectively, of 0°. Signed and absolute errors, the rod and frame effect (RFE), and intra-individual variability (inconsistency) were used for analysis.ResultsThere was no group difference in rod alignment errors or derived measures, except that SCZ displayed greater inconsistency in rod alignment, compared to controls. The negative symptom scale (PANSS-N) scores correlated positively with the variability measure and with unsigned Frame–18° error.ConclusionsOnly the variability measure was sensitive enough to distinguish between controls and SCZ. SCZ with more severe negative symptoms had larger variability in rod alignment, probably reflecting a state of indifference. The larger deviation errors only with a leftward tilted frame, as PANSS-N scores increased, may indicate a lateralized attentional abnormality that is correlated with severity of symptoms in SCZ.

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Section: Discussionmentioning

confidence: 76%

Symptom severity is associated with leftward lateralization upon contextual modulation of visual vertical in patients with schizophrenia

Razzak

Jahrami²,

Husni³

et al. 2022

Front. Psychiatry

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“…The primary outcome was the perception of visual verticality using the absolute error mean and its standard deviation (SD) measured with SVV test or RFT in the exposed and healthy subjects. Other error calculation measurements of the RFT, as the variability of the error (VE), were not included in our meta-analysis due to their limited use in the scientific literature [ 39 ]. When a study met the inclusion criteria and did not provide the SD necessary for the statistical analysis, we collected the standard error mean, ranges (minimum and maximum), interquartile ranges, and the sample size to be transformed into in SD, according to the “ Cochrane Handbook for Systematic Reviews of Intervention ” [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Data Extractionmentioning

confidence: 99%

Visual Verticality Perception in Spinal Diseases: A Systematic Review and Meta-Analysis

Obrero‐Gaitán

Molina

Casado

et al. 2020

JCM

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Patients diagnosed with traumatic or non-traumatic spinal pain and idiopathic scoliosis frequently suffer from imbalance. The evaluation of the perception of verticality by means of visual tests emerges as a quick and easy tool for clinical management of the balance disorders. Several studies have assessed the visual perception of verticality in spinal diseases obtaining controversial results. The aim of our study is to analyze the perception of visual verticality in subjects with several spinal diseases in comparison with healthy subjects. A meta-analysis was carried out. PubMed MEDLINE, Scopus, WoS, CINAHL, and SciELO databases were searched until January 2020. The standardized mean difference (SMD) was calculated to analyze differences between patients and healthy controls. Fifteen studies with a total of 2052 patients were included. In comparison with healthy subjects, a misperception of verticality was found in patients with spinal pain when the perception of the verticality was assessed with the rod and frame test (SMD = 0.339; 95% confidence interval (CI) = 0.181, 0.497; p < 0.001). It seems that the perception of visual verticality is not altered in patients with idiopathic scoliosis (p = 0.294). The present meta-analysis shows a misperception of visual verticality only in patients with spinal pain.

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KOJI AWARENESS, a self-rating whole-body movement assessment system, has intersession reliability and comparability to external examiner rating

Takasaki,

Kanayasu

2024

PLoS ONE

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KOJI AWARENESS is a newly developed self-rating whole-body movement assessment system that includes 11 domains and 22 tests. The primary aim of this study was to investigate the intersession reliability of KOJI AWARENESS, and the secondary aim was to determine whether a fixed bias existed between self-rating and external examiner rating. Fifty university students rated their movement ability in two separate sessions; an external examiner also rated the students’ movement ability. Participants were blinded to their scores at the first session as well as the external examiner’s rating scores. The primary analysis included examining the intersession reliability of the total score with intraclass correlation coefficients (ICCs). ICC values were interpreted as follows: insufficient, < .7 and sufficient, ≥ .7. To achieve the secondary aim, Bland–Altman analysis was performed. ICC for the intersession reliability was .86 with a 95% confidence interval (CI) of .77 to .92 and a minimum detectable change (MDC) of 5.15. Bland–Altman analysis revealed fixed bias as the 95% CIs of the mean difference between the two different rating scores (−3.49 to −2.43 and −3.94 to −2.98 in the first and second sessions, respectively) did not include 0 in the data of each session. However, no proportional bias was identified because no statistically significant Pearson’s correlation (P > .05) was noted between the means of the two methods and the mean difference between the two different methods in each session. This study identified that KOJI AWARENESS has sufficient intersession reliability among relatively young and healthy participants. External examiner rating tended to have lower total scores than self-rating; however, the bias was below the MDC and seemed not to be clinically significant.

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Re: “High variability of the subjective visual vertical test of vertical perception, in some people with neck pain – Should this be a standard measure of cervical proprioception?”

Cited by 3 publications

References 6 publications

Symptom severity is associated with leftward lateralization upon contextual modulation of visual vertical in patients with schizophrenia

Symptom severity is associated with leftward lateralization upon contextual modulation of visual vertical in patients with schizophrenia

Visual Verticality Perception in Spinal Diseases: A Systematic Review and Meta-Analysis

KOJI AWARENESS, a self-rating whole-body movement assessment system, has intersession reliability and comparability to external examiner rating

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