Objective:To explore the etiology, clinical features and treatment of superficial siderosis of central nervous system (SSCNS) in China.Methods:The clinical data of four patients with SSCNS diagnosed by magnetic resonance imaging (MRI) and susceptibility weighted imaging (SWI) from Qilu Hospital of Shandong University during 2015—2019 were retrospectively reviewed. The etiology and clinical features of the four cases were summarized and analyzed.Results:All the four patients were male, with an average age of 60.5 years. Clinical symptoms included headache, hearing loss, and cerebellar ataxia. Brain MRI and SWI showed that hemosiderin mainly deposited (short linear T 2 signal, low SWI signal) on the surface of cerebellum, brainstem, temporal lobe, frontal lobe, and spinal cord. Potential bleeding sites were found in all four patients, including brain traumatic history, spinal intradural extramedullary cavernous hemangioma, brain metastasis and intracranial aneurysm. Patients were followed up for six months to four years. Headache symptoms improved in only one patient who received surgical treatment, while symptoms of the other three patients progressed. Conclusions:SSCNS is mainly characterized by hearing loss, progressive cerebellar ataxia and myelopathy. The diagnosis of this disease mainly depends on imaging examination. The linear low signal on the surface of T 2WI is the main basis for the diagnosis of SSCNS. Surgical treatment of bleeding sites and iron chelator are the main treatments of the disease.

Objective:To explore the mediating effect and masking effect of creative self-efficacy on emotion regulation and procrastination behavior of nursing undergraduates, to provide a reference for the cultivation of creative self-efficacy of nursing undergraduates and improvement of their competence in innovative tasks.Methods:From May to June 2018, a total of 550 nursing undergraduates from a medical university in Hefei were surveyed by cluster sampling method, using general data questionnaire, Emotion Regulation Questionnaire, Creative Self-efficacy Scale for College Students and General Procrastination Scale. A total of 550 questionnaires were issued in this study and 509 valid questionnaires were finally recovered, with an effective recovery rate of 92.55%.Results:The procrastination behavior of nursing undergraduates was negatively correlated with emotion regulation and cognitive reappraisal ( P<0.01) , and positively correlated with expression suppression ( P<0.01) . Procrastination behavior was negatively correlated with creative efficacy and its dimensions ( P<0.01) . Emotion regulation and its dimensions were positively correlated with creative efficacy ( P<0.01) . The creative efficacy of nursing undergraduates played a part of the mediating role between cognitive reappraisal and procrastination behavior, and the indirect effect of creative self-efficacy between expression suppression and procrastination behavior was shown as a masking effect. Conclusions:Cognitive reappraisal or expression suppression can indirectly affect procrastination behavior through creative self-efficacy. Nursing educators can enhance students' innovation efficacy by increasing the self-recognition of nursing students and opening innovative training courses online or offline.

Objective:To explore the mediating effect of positive psychological capital on achievement motivation and procrastination behavior of nursing undergraduates and the moderating effect of positive perfectionism on mediation.Methods:Using the cluster sampling method, a total of 550 nursing undergraduates from the 1st to 4th grades of School of Nursing of a medical university were selected as research objects from May to June 2018. General information questionnaire, Achievement Motivation Scale (AMS) , Positive Psychological Capital Questionnaire (PPQ) , positive perfectionism dimension of Frost Multidimensional Perfectionism Scale and General Procrastination Scale (GPS) were used for investigation. PROCESS software was used for moderated mediation effect analysis.Results:A total of 550 questionnaires were issued and 509 valid questionnaires were finally recovered, with an effective recovery rate of 92.55%. The GPS score of 509 nursing undergraduates was (55.08±8.18) , AMS score was (-0.03±6.02) , PPQ score was (4.35±0.70) and score of positive perfectionism dimension was (17.26±4.69) . Achievement motivation, positive psychological capital and positive perfectionism were all negatively correlated with procrastination behavior ( r=-0.245, -0.415, -0.357; P<0.01) . Positive psychological capital played a partial mediating role between achievement motivation and procrastination behavior, and the mediating effect accounted for 42.31% of the total effect. Positive perfectionism had a moderating effect on the second half of the mediating pathway of positive psychological capital ( P< 0.05) . Conclusions:The procrastination behavior of nursing undergraduates is at the middle level. Achievement motivation can influence procrastination behavior through positive psychological capital and positive perfectionism regulates the relationship between positive psychological capital and procrastination behavior.