Limits...
Subjective visual vertical and postural capability in children born prematurely.

Bucci MP, Wiener-Vacher S, Trousson C, Baud O, Biran V - PLoS ONE (2015)

Bottom Line: Postural performance was poor in preterm-born children compared to that of age-matched full-term children: the surface area, the length in medio-lateral direction and the mean speed of the center of pressure (CoP) were significantly larger in the preterm-born children group (p < 0.04, p < 0.01, and p < 0.04, respectively).Dual task in both groups of children significantly affected postural control.We suggest that poor postural control as well as perception of verticality observed in preterm-born children could be due to immaturity of the cortical processes involved in the motor control and in the treatment of perception and orientation of verticality.

View Article: PubMed Central - PubMed

Affiliation: UMR1141 INSERM-Université Paris 7, Robert Debré Hospital, 48 boulevard Sérurier, 75019, Paris, France; Vestibular and Oculomotor Evaluation Unit (EFEE), ENT Dept., Robert Debré Paediatric Hospital, 48 boulevard Sérurier, 75019, Paris, France.

ABSTRACT

Purpose: We compared postural stability and subjective visual vertical performance in a group of very preterm-born children aged 3-4 years and in a group of age-matched full-term children.

Materials and methods: A platform (from TechnoConcept) was used to measure postural control in children. Perception of subjective visual vertical was also recorded with posture while the child had to adjust the vertical in the dark or with visual perturbation. Two other conditions (control conditions) were also recorded while the child was on the platform: for a fixation of the vertical bar, and in eyes closed condition.

Results: Postural performance was poor in preterm-born children compared to that of age-matched full-term children: the surface area, the length in medio-lateral direction and the mean speed of the center of pressure (CoP) were significantly larger in the preterm-born children group (p < 0.04, p < 0.01, and p < 0.04, respectively). Dual task in both groups of children significantly affected postural control. The subjective visual vertical (SVV) values were more variable and less precise in preterm-born children.

Discussion-conclusions: We suggest that poor postural control as well as perception of verticality observed in preterm-born children could be due to immaturity of the cortical processes involved in the motor control and in the treatment of perception and orientation of verticality.

No MeSH data available.


Related in: MedlinePlus

Mean Subjective visual vertical measure.Mean values of the SVV for the three different conditions (OKN+SVV at 40°/s toward the left and the right and the condition No OKN+SVV) for the two groups of children tested. Verticals bars indicate the standard error.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4366151&req=5

pone.0121616.g002: Mean Subjective visual vertical measure.Mean values of the SVV for the three different conditions (OKN+SVV at 40°/s toward the left and the right and the condition No OKN+SVV) for the two groups of children tested. Verticals bars indicate the standard error.

Mentions: Fig. 2 shows the subjective visual vertical measures in absolute values for the three conditions (the OKN+SVV: 40°/s left and right direction and the No OKN+SVV condition) for both groups of children tested (preterm and full-term born children, respectively). ANOVA showed a significant effect of group only (F(1,42) = 43.53, p < 0.001). The subjective visual vertical values for pre-term born children were significantly larger than those reported in full-term born children. The post-hoc test failed to show significant differences in the three conditions.


Subjective visual vertical and postural capability in children born prematurely.

Bucci MP, Wiener-Vacher S, Trousson C, Baud O, Biran V - PLoS ONE (2015)

Mean Subjective visual vertical measure.Mean values of the SVV for the three different conditions (OKN+SVV at 40°/s toward the left and the right and the condition No OKN+SVV) for the two groups of children tested. Verticals bars indicate the standard error.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4366151&req=5

pone.0121616.g002: Mean Subjective visual vertical measure.Mean values of the SVV for the three different conditions (OKN+SVV at 40°/s toward the left and the right and the condition No OKN+SVV) for the two groups of children tested. Verticals bars indicate the standard error.
Mentions: Fig. 2 shows the subjective visual vertical measures in absolute values for the three conditions (the OKN+SVV: 40°/s left and right direction and the No OKN+SVV condition) for both groups of children tested (preterm and full-term born children, respectively). ANOVA showed a significant effect of group only (F(1,42) = 43.53, p < 0.001). The subjective visual vertical values for pre-term born children were significantly larger than those reported in full-term born children. The post-hoc test failed to show significant differences in the three conditions.

Bottom Line: Postural performance was poor in preterm-born children compared to that of age-matched full-term children: the surface area, the length in medio-lateral direction and the mean speed of the center of pressure (CoP) were significantly larger in the preterm-born children group (p < 0.04, p < 0.01, and p < 0.04, respectively).Dual task in both groups of children significantly affected postural control.We suggest that poor postural control as well as perception of verticality observed in preterm-born children could be due to immaturity of the cortical processes involved in the motor control and in the treatment of perception and orientation of verticality.

View Article: PubMed Central - PubMed

Affiliation: UMR1141 INSERM-Université Paris 7, Robert Debré Hospital, 48 boulevard Sérurier, 75019, Paris, France; Vestibular and Oculomotor Evaluation Unit (EFEE), ENT Dept., Robert Debré Paediatric Hospital, 48 boulevard Sérurier, 75019, Paris, France.

ABSTRACT

Purpose: We compared postural stability and subjective visual vertical performance in a group of very preterm-born children aged 3-4 years and in a group of age-matched full-term children.

Materials and methods: A platform (from TechnoConcept) was used to measure postural control in children. Perception of subjective visual vertical was also recorded with posture while the child had to adjust the vertical in the dark or with visual perturbation. Two other conditions (control conditions) were also recorded while the child was on the platform: for a fixation of the vertical bar, and in eyes closed condition.

Results: Postural performance was poor in preterm-born children compared to that of age-matched full-term children: the surface area, the length in medio-lateral direction and the mean speed of the center of pressure (CoP) were significantly larger in the preterm-born children group (p < 0.04, p < 0.01, and p < 0.04, respectively). Dual task in both groups of children significantly affected postural control. The subjective visual vertical (SVV) values were more variable and less precise in preterm-born children.

Discussion-conclusions: We suggest that poor postural control as well as perception of verticality observed in preterm-born children could be due to immaturity of the cortical processes involved in the motor control and in the treatment of perception and orientation of verticality.

No MeSH data available.


Related in: MedlinePlus