Three-dimensional motion of the toes with simulated contraction of individual toe flexors and extensors: A cadaver study.

BACKGROUND: The primary motion of the toes is flexion and extension. The motion results from activity of multiple muscles, and toe disorders may result from muscle dysfunction. The relationships of specific muscles related to toe function is underreported. The purpose of this study was to quantitatively evaluate three-dimensional toe motion resulting from specific muscle contraction using cadavers. METHODS: Three-dimensional joint movements of the 1st, 2nd, and 5th toe were produced by applying traction of individual muscles using six Thiel-embalmed cadaver legs. The traction increments were 3 mm, 6 mm, and 9 mm, during which the angle of the distal bone with respect to the proximal bone of each toe joint was measured using a magnetic tracking system. RESULTS: As tendon traction distance increased, the angular measure of the distal bone with respect to the proximal bone at each toe joint increased linearly and three-dimensionally. The flexor hallucis brevis significantly pronated and abducted the 1st toe compared to the extensor hallucis longus and brevis. The flexor digitorum brevis significantly supinated and adducted the 2nd toe compared to the flexor digitorum longus and quadratus plantae, while the extensor digitorum brevis demonstrated significant pronation and abduction compared to the extensor digitorum longus. CONCLUSIONS: Three intrinsic muscles produced significant toe motion in frontal and horizontal planes. Our results revealed that there was a proportional relationship between tendon excursion and joint angle, and an antagonistic relationship of muscles acting on the toes. These results can be considered regarding pathogenesis of toe disorders or deformity and regarding treatment such as exercise therapy or tendon transfer. LEVEL OF EVIDENCE: V, cadaveric study.

Comparison of the three-dimensional bone morphology of the first proximal phalanx and first metatarsal between normal and hallux valgus foot using the homologous model technique.

Bone morphology is one of the factors involved in hallux valgus development. However, previous studies have not evaluated the overall bone shape in three dimensions. This study aimed to compare the overall shape of the first proximal phalanx and first metatarsal in hallux valgus with those of normal feet.Homologous models were created from computed tomography data of the first proximal phalanx and first metatarsal of 75 healthy men and 53 women in the control group and 10 men and 71 women in the hallux valgus group. Principal component analysis was performed to examine the differences in bone morphology between the control and hallux valgus groups. In men and women with hallux valgus, the proximal articular surface of the first proximal phalanx was characterized by a more lateral inclination and torsion of the pronated first metatarsal. Additionally, the first metatarsal head was characterized by a more lateral inclination in male hallux valgus. This study is the first to reveal the morphological characteristics of the first metatarsal and first proximal phalanx in hallux valgus as a whole bone using a homologous model technique. These characteristics are considered possible causes of hallux valgus development. The shapes of the first proximal phalanx and first metatarsal in hallux valgus were different from those in normal feet. This finding should be useful when considering the pathogenesis and treatment development for hallux valgus.

The Impact of the COVID-19 Pandemic on Suicide Rate Trends in the Tsunami-Disaster-Affected Area Following the Great East Japan Earthquake.

Background: People who experienced the Great East Japan Earthquake (GEJE) were expected to have additional levels of psychological burden resulting from the stressful conditions imposed during the coronavirus disease 2019 (COVID-19) pandemic; consequently, suicide rates may increase. Aim: We aimed to carry out continuous monitoring of suicide rates in the affected area following the GEJE under COVID-19 pandemic conditions. Method: This descriptive study monitored the suicide rates of the coastal area of Miyagi Prefecture, where disaster-related mental health activities have been continuing following severe damage caused by the tsunami disaster. An exponential smoothing time-series analysis that converted suicide rates into a smooth trend was conducted. Results: Although the suicide rate in the affected area was higher than the national average in February 2020, it showed a declining trend during the COVID-19 pandemic, while showing an increase trend in the national and non-affected areas. Limitations: Uncertainty about the direct reasons for suicide and the short time-scale observation are the limitations of this study. Conclusion: Although the national suicide rate increased, this was not the case for the affected area. Our findings may provide important lessons for suicide prevention during the COVID-19 pandemic, which needs careful regional monitoring of the state of suicide and of high-risk approaches such as disaster-related mental health activities.

Three-dimensional motion analysis of the hindfoot resulting from simulated contraction of individual lower leg muscles utilizing Thiel-embalmed cadavers.

BACKGROUND: Joint movement within the foot is complex involving multiple muscles. We evaluated three-dimensional movement of the hindfoot through simulated traction of extrinsic tendons of the foot. METHODS: Six Thiel-embalmed cadavers were utilized and thread was sutured to each tendon of the lower leg muscles. Traction of the thread was prescribed and the change of calcaneal position used to quantify foot motion was measured for each increment using a magnetic tracking system. RESULTS: As the tendon traction length advanced, the angle of the calcaneus with respect to the tibia increased linearly. Eversion and abduction angles due to extensor digitorum longus (EDL) traction were significantly greater than that due to the peroneus longus. Plantarflexion due to Achilles tendon traction was significantly greater than that of other plantarflexors. CONCLUSIONS: Our results demonstrated three-dimensional characteristics of hindfoot motion by simulated muscle contraction and importance of EDL as an evertor. These information should be applicable for tendon transfer procedures around the ankle and physical therapy for ankle dysfunction such as chronic ankle instability.

Practical Report of Disaster-Related Mental Health Interventions Following the Great East Japan Earthquake during the COVID-19 Pandemic: Potential for Suicide Prevention.

Background: This practical report aims to publicize the ongoing disaster-related mental health interventions following the Great East Japan Earthquake during the COVID-19 pandemic. Methods: Disaster-related mental health interventions consisted of: (1) screening high-risk evacuees with high psychological distress (Kessler 6 score ≥ 13) or binge drinking; and (2) visiting selected high-risk individuals and providing them counseling through outreach in evacuee housing. These activity records were compiled from existing material in the Sendai City Office; therefore, no new interviews or questionnaire surveys were conducted. Results: During the COVID-19 pandemic, we introduced telephone counseling and shortened the time of support as a result of the restrictions. Counselors addressed issues of "loneliness" or "isolation" among evacuees, who had little connection with society due to the pandemic. Moreover, the procedure for obtaining COVID-19 special financial aid was explained to evacuees in financial difficulty. During this period, the suicide rates in the affected area did not increase significantly as compared to the national average. Conclusions: Our report may be instructive in terms of preventing suicide during the pandemic using high-risk approaches and counselors trained in disaster-related mental health interventions.

Practical Report on Long-term Disaster Mental Health Services Following the Great East Japan Earthquake: Psychological and Social Background of Evacuees in Sendai City in the Mid- to Long-term Post-disaster Period.

OBJECTIVE: The Great East Japan Earthquake, which occurred on March 11, 2011, caused unprecedented damage. To address evacuees' psychosocial issues, our disaster mental health team provided psychosocial support in the form of careful listening and providing information for reconstruction. METHODS: To summarize evacuees' psychosocial issues, we reviewed records of our daily activities and analyzed factors related to continuation or termination of support. Terminated support was defined as the resolution or improvement of psychological issues relative to the time of initial support. RESULTS: Based on logistic regression analysis, living in prefabricated temporary housing (odds ratio [OR]: 0.37; 95% confidence interval [CI]: 0.19-0.72), a high number of improved stress symptoms (0.81; 95% CI: 0.67-0.99), and higher support frequency (0.84; 95% CI: 0.78-0.90) were significantly associated with a lower likelihood of continuing support. Conversely, economic and resettlement issues (2.75; 95% CI: 1.63-4.64) and high numbers of stress symptoms (1.24; 95% CI: 1.06-1.45) were strongly and significantly associated with continuing support, particularly in the mid- to long-term phase following the earthquake (ie, after August 1, 2011). No significant association was found between support status and alcohol problems or disaster-related experiences (eg, loss of family or housing). CONCLUSION: Our findings highlight the need to be aware of evacuees' social issues such as resettlement in the mid- to long-term post-disaster phase. (Disaster Med Public Health Preparedness. 2017;11:439-450).

Delayed increase in male suicide rates in tsunami disaster-stricken areas following the great east japan earthquake: a three-year follow-up study in Miyagi Prefecture.

Devastating natural disasters and their aftermath are known to cause psychological distress. However, little information is available regarding suicide rates following tsunami disasters that destroy regional social services and networks. The aim of the present study was to determine whether the tsunami disaster following the Great East Japan Earthquake in March 2011 has influenced suicide rates. The study period was from March 2009 to February 2014. Tsunami disaster-stricken areas were defined as the 16 municipalities facing the Pacific Ocean in Miyagi Prefecture. Inland areas were defined as other municipalities in Miyagi that were damaged by the earthquake. Suicide rates in the tsunami disaster-stricken areas were compared to national averages, using a time-series analysis and the Poisson distribution test. In tsunami disaster-stricken areas, male suicide rates were significantly lower than the national average during the initial post-disaster period and began to increase after two years. Likewise, male suicide rates in the inland areas decreased for seven months, and then increased to exceed the national average. In contrast, female post-disaster suicide rates did not change in both areas compared to the national average. Importantly, the male suicide rates in the inland areas started to increase earlier compared to the tsunami-stricken areas, which may reflect the relative deficiency of mental healthcare services in the inland areas. Considering the present status that many survivors from the tsunami disaster still live in temporary housing and face various challenges to rebuild their lives, we should continue intensive, long-term mental healthcare services in the tsunami-stricken areas.

Changes in suicide rates in disaster-stricken areas following the Great East Japan Earthquake and their effect on economic factors: an ecological study.

OBJECTIVE: Devastating disasters may increase suicide rates due to mental distress. Previous domestic studies have reported decreased suicide rates among men following disasters. Few reports are available regarding factors associated with disasters, making it difficult to discuss how these events affect suicide rates. This study aimed to observe changes in suicide rates in disaster-stricken and neighboring areas following the Great East Japan Earthquake, and examine associations between suicide rates and economic factors. METHODS: Monthly suicide rates were observed from March 2009 to February 2013, during which time the earthquake occurred on March, 2011. Data were included from disaster-stricken (Iwate, Miyagi, and Fukushima Prefectures) and neighboring (control: Aomori, Akita, and Yamagata Prefectures) areas. The association between changes in suicide rates and economic variables was evaluated based on the number of bankruptcy cases and ratio of effective job offers. RESULTS: In disaster-stricken areas, post-disaster male suicide rates decreased during the 24 months following the earthquake. This trend differed relative to control areas. Female suicide rates increased during the first seven months. Multiple regression analysis showed that bankruptcy cases (ß = 0.386, p = 0.038) and ratio of effective job offers (ß = -0.445, p = 0.018) were only significantly associated with male post-disaster suicide rates in control areas. CONCLUSION: Post-disaster suicide rates differed by gender following the earthquake. Our findings suggest that considering gender differences might be important for developing future post-disaster suicide prevention measures. This ecological study revealed that increasing effective job offers and decreasing bankruptcy cases can affect protectively male suicide rates in control areas.

[Challenges faced by psychiatric services in Miyagi Prefecture after the Great East Japan Earthquake].

Following the Great East Japan Earthquake and Tsunami, the number of patients with onset, relapse, and exacerbation of mental disorders was expected to increase in Miyagi Prefecture, one of the worst affected areas. The functioning of almost all psychiatric hospitals sharply declined or even ceased. This situation worsened with traffic congestion and crippled public transportation, hindering many patients with psychiatric disorders from accessing mental health services. Among them, patients with schizophrenia and related disorders were affected the most; some could not reach the hospitals and clinics they had regularly visited and had to become new patients of another hospital or clinic. Moreover, an increasing number of patients with schizophrenia needed to be hospitalized because of acute exacerbations of their disorder, due to the experience of the disaster and the consequent drastic changes in their living environment Unfortunately, the support system for psychiatric institutions after disasters is not yet well structured; the system needs to be rebuilt and strengthened in anticipation of future disasters.