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Disturbances in equilibrium function after major earthquake.

Honma M, Endo N, Osada Y, Kim Y, Kuriyama K - Sci Rep (2012)

Bottom Line: Major earthquakes were followed by a large number of aftershocks and significant outbreaks of dizziness occurred over a large area.Equilibrium dysfunction in the aftershock-exposed group appears to have arisen from disturbance of the inner ear, as well as individual vulnerability to state anxiety enhanced by repetitive exposure to aftershocks.We indicate potential effects of autonomic stress on equilibrium function after major earthquake.

View Article: PubMed Central - PubMed

Affiliation: Department of Adult Mental Health, National Institute of Mental Health, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8553, Japan. mhonma@ncnp.go.jp

ABSTRACT
Major earthquakes were followed by a large number of aftershocks and significant outbreaks of dizziness occurred over a large area. However it is unclear why major earthquake causes dizziness. We conducted an intergroup trial on equilibrium dysfunction and psychological states associated with equilibrium dysfunction in individuals exposed to repetitive aftershocks versus those who were rarely exposed. Greater equilibrium dysfunction was observed in the aftershock-exposed group under conditions without visual compensation. Equilibrium dysfunction in the aftershock-exposed group appears to have arisen from disturbance of the inner ear, as well as individual vulnerability to state anxiety enhanced by repetitive exposure to aftershocks. We indicate potential effects of autonomic stress on equilibrium function after major earthquake. Our findings may contribute to risk management of psychological and physical health after major earthquakes with aftershocks, and allow development of a new empirical approach to disaster care after such events.

No MeSH data available.


Related in: MedlinePlus

Psychological distress affects equilibrium dysfunction.TPL, REC-Area, and ENV-Area were significantly correlated with STAI-state, -trait, and BDI only under the EC condition in the Quake group. The STAI-state was strongly correlated with TPL (a), REC-Area (b), and ENV-Area (c). The STAI-trait also was strongly correlated with TPL (d), REC-Area (e), and ENV-Area (f). The BDI was correlated with TPL (g), REC-Area (h), and ENV-Area (i). None of the stabilometric measurements in the Control group were significantly correlated with STAI-state, -trait, or BDI. The red squares with solid regression lines represent the Quake group, and the blue circles with dashed regression lines represent the Control group.
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f2: Psychological distress affects equilibrium dysfunction.TPL, REC-Area, and ENV-Area were significantly correlated with STAI-state, -trait, and BDI only under the EC condition in the Quake group. The STAI-state was strongly correlated with TPL (a), REC-Area (b), and ENV-Area (c). The STAI-trait also was strongly correlated with TPL (d), REC-Area (e), and ENV-Area (f). The BDI was correlated with TPL (g), REC-Area (h), and ENV-Area (i). None of the stabilometric measurements in the Control group were significantly correlated with STAI-state, -trait, or BDI. The red squares with solid regression lines represent the Quake group, and the blue circles with dashed regression lines represent the Control group.

Mentions: There were no significant correlations between the clinical questionnaires and the stabilometric parameters under either the EO or EC condition in the Control group (Pearson's correlation coefficient, all: p > 0.10). However, there were significant correlations between each stabilometric parameter and STAI-state (TPL: r = 0.502, p < 0.0001; REC-Area: r = 0.494, p < 0.0001; ENV-Area: r = 0.495, p < 0.0001; Fig. 2a–c), STAI-trait (TPL: r = 0.420, p = 0.002; REC-Area: r = 0.337, p = 0.008; ENV-Area: r = 0.352, p = 0.011; Fig. 2d–f), and BDI (TPL: r = 0.364, p = 0.007; REC-Area: r = 0.336, p = 0.015; ENV-Area: r = 0.352, p = 0.010; Fig. 2g–i) under the EC condition in the Quake group (Fig. 2a–i), but not under the EO condition (all: p > 0.10). There were no significant correlations between other factors (body-mass index, athletic history, anxiety over radiation and earthquakes, and subjective sense of sway,) and any of the stabilometric parameters (all: p > 0.10).


Disturbances in equilibrium function after major earthquake.

Honma M, Endo N, Osada Y, Kim Y, Kuriyama K - Sci Rep (2012)

Psychological distress affects equilibrium dysfunction.TPL, REC-Area, and ENV-Area were significantly correlated with STAI-state, -trait, and BDI only under the EC condition in the Quake group. The STAI-state was strongly correlated with TPL (a), REC-Area (b), and ENV-Area (c). The STAI-trait also was strongly correlated with TPL (d), REC-Area (e), and ENV-Area (f). The BDI was correlated with TPL (g), REC-Area (h), and ENV-Area (i). None of the stabilometric measurements in the Control group were significantly correlated with STAI-state, -trait, or BDI. The red squares with solid regression lines represent the Quake group, and the blue circles with dashed regression lines represent the Control group.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3475992&req=5

f2: Psychological distress affects equilibrium dysfunction.TPL, REC-Area, and ENV-Area were significantly correlated with STAI-state, -trait, and BDI only under the EC condition in the Quake group. The STAI-state was strongly correlated with TPL (a), REC-Area (b), and ENV-Area (c). The STAI-trait also was strongly correlated with TPL (d), REC-Area (e), and ENV-Area (f). The BDI was correlated with TPL (g), REC-Area (h), and ENV-Area (i). None of the stabilometric measurements in the Control group were significantly correlated with STAI-state, -trait, or BDI. The red squares with solid regression lines represent the Quake group, and the blue circles with dashed regression lines represent the Control group.
Mentions: There were no significant correlations between the clinical questionnaires and the stabilometric parameters under either the EO or EC condition in the Control group (Pearson's correlation coefficient, all: p > 0.10). However, there were significant correlations between each stabilometric parameter and STAI-state (TPL: r = 0.502, p < 0.0001; REC-Area: r = 0.494, p < 0.0001; ENV-Area: r = 0.495, p < 0.0001; Fig. 2a–c), STAI-trait (TPL: r = 0.420, p = 0.002; REC-Area: r = 0.337, p = 0.008; ENV-Area: r = 0.352, p = 0.011; Fig. 2d–f), and BDI (TPL: r = 0.364, p = 0.007; REC-Area: r = 0.336, p = 0.015; ENV-Area: r = 0.352, p = 0.010; Fig. 2g–i) under the EC condition in the Quake group (Fig. 2a–i), but not under the EO condition (all: p > 0.10). There were no significant correlations between other factors (body-mass index, athletic history, anxiety over radiation and earthquakes, and subjective sense of sway,) and any of the stabilometric parameters (all: p > 0.10).

Bottom Line: Major earthquakes were followed by a large number of aftershocks and significant outbreaks of dizziness occurred over a large area.Equilibrium dysfunction in the aftershock-exposed group appears to have arisen from disturbance of the inner ear, as well as individual vulnerability to state anxiety enhanced by repetitive exposure to aftershocks.We indicate potential effects of autonomic stress on equilibrium function after major earthquake.

View Article: PubMed Central - PubMed

Affiliation: Department of Adult Mental Health, National Institute of Mental Health, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8553, Japan. mhonma@ncnp.go.jp

ABSTRACT
Major earthquakes were followed by a large number of aftershocks and significant outbreaks of dizziness occurred over a large area. However it is unclear why major earthquake causes dizziness. We conducted an intergroup trial on equilibrium dysfunction and psychological states associated with equilibrium dysfunction in individuals exposed to repetitive aftershocks versus those who were rarely exposed. Greater equilibrium dysfunction was observed in the aftershock-exposed group under conditions without visual compensation. Equilibrium dysfunction in the aftershock-exposed group appears to have arisen from disturbance of the inner ear, as well as individual vulnerability to state anxiety enhanced by repetitive exposure to aftershocks. We indicate potential effects of autonomic stress on equilibrium function after major earthquake. Our findings may contribute to risk management of psychological and physical health after major earthquakes with aftershocks, and allow development of a new empirical approach to disaster care after such events.

No MeSH data available.


Related in: MedlinePlus