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The oscillatory activities from the amygdala and hippocampus were analyzed during fear memory retrieval compared with neutral stages. RESULTS Consistent with previous rodent studies, our results showed that the amygdala was involved in fear memory retrieval rather than neutral memory retrieval, while the hippocampus was involved both in fear memory retrieval and neutral memory retrieval. In particular, we found that there was an enhanced synchronized activity between the amygdala and hippocampus at beta frequencies (14-30 Hz), which suggested that enhanced synchronized activity at beta frequencies between the amygdala and hippocampus play a pivotal role during retrieval of fear memory in human. CONCLUSIONS Thus, our observation that the amygdala-hippocampal system contributing to fear memory retrieval in human with frequency-depended specificity has provided new insights into the mechanism of fear and have potential clinical relevance.BACKGROUND There is wide variation in the reported size of ruptured intracranial aneurysms and methods of size estimation. There is widespread belief that small aneurysms less then  7 mm do not rupture. Therefore, we performed a systematic review and meta-analysis of the literature to determine the size of ruptured aneurysms according to aneurysm locations and methods of size estimation. METHODS We searched PubMed, Cochrane, CINAHL, and EMBASE databases using a combination of Medical Subject Headings (MeSH) terms. We included articles that reported mean aneurysm size in consecutive series of ruptured intracranial. We excluded studies limited to a specific aneurysm location or type. The random-effects model was used to calculate overall mean size and location-specific mean size. We performed meta-regression to explain observed heterogeneity and variation in reported size. RESULTS The systematic review included 36 studies and 12,609 ruptured intracranial aneurysms. Overall mean aneurysm size was 7.0 mm (95% confidence interval [CI 6.2-7.4]). Pooled mean size varied with location. Overall mean size of 2145 ruptured anterior circulation aneurysms was 6.0 mm (95% CI 5.6-6.4, residual I2 = 86%). Overall mean size of 743 ruptured posterior circulation aneurysms was 6.2 mm (95% CI 5.3-7.0, residual I2 = 93%). Meta-regression identified aneurysm location and definition of size (i.e., maximum dimension vs. aneurysm height) as significant determinants of aneurysm size reported in the studies. CONCLUSIONS The mean size of ruptured aneurysms in most studies was approximately 7 mm. The general wisdom that aneurysms of this size do not rupture is incorrect. Location and size definition were significant determinants of aneurysm size.PURPOSE Styloidectomy is the mainstream treatment for Eagle's syndrome when conservative treatment fails. However, the clinical efficacy of tonsil-sparing styloidectomy remains controversial. This study aimed to evaluate postoperative pain after tonsil-sparing styloidectomy in patients with Eagle's syndrome. METHODS This retrospective study enrolled 14 patients who underwent tonsil-sparing styloidectomy (TSS group) and 22 patients who underwent traditional tonsillect-styloidectomy (TTS group). Pain was evaluated using the 11-point numeric rating scale (NRS-11) at the following time points on admission, 1 day after the operation, 3 days, postoperatively, 1 week postoperatively, 2 weeks, postoperatively, and 3 months, postoperatively. RESULTS The postoperative course was uneventful in both groups. Pain with movement was significantly reduced 3 months, postoperatively (1.28 ± 1.1), compared with the preoperative baseline level (4.78 ± 0.9) (P  less then  0.001). NS 105 ic50 There was no significant difference in the rate at which pain decreased between the TSS group (n = 9/14; 64.3%) and the TTS group (n = 17/22; 77.3%) (P = 0.396). One week postoperatively, resting pain in the TSS group (4.36 ± 0.7) was significantly lower than that in the TTS group (5.41 ± 0.8) (P = 0.001); pain with movement in the TSS group (5.00 ± 0.8) was significantly lower than that in the TTS group (5.86 ± 0.7) (P = 0.002). Two weeks postoperatively, resting pain in the TSS group (1.14 ± 0.4) was also significantly lower than that in the TTS group (1.73 ± 0.6) (P = 0.003). CONCLUSIONS Tonsil-sparing styloidectomy is a safe and effective modality for treating Eagle's syndrome. Although there was no significant difference in surgical risk or long-term outcomes between tonsil-sparing styloidectomy and traditional tonsillect-styloidectomy, tonsil-sparing styloidectomy can alleviate perioperative pain.BACKGROUND Unexpected facial nerve damage can occur during parotid gland tumor surgery. We sought to determine the incidence and treatment outcomes of unexpected facial nerve injuries in patients with parotid gland tumor surgery. METHODS We retrospectively enrolled in this study five patients, who underwent facial nerve neurorrhaphy due to unexpected facial nerve injury during parotid gland tumor surgery January 2012-August 2019. RESULTS There were five patients (0.008%) with unexpected facial nerve injuries during the parotid gland tumor surgery of 577 patients in our hospital for approximately 8 years. The most common injury site of facial nerve was the marginal mandibular branch (n = 3), followed by the buccal branch (n = 1), and the cervicofacial division (n = 1). In the case of unexpected facial nerve damage, our treatment is immediate primary neurorrhaphy and steroid treatment. Three patients of five recovered and two did not worsen immediately after surgery. CONCLUSION Unexpected facial nerve injury during parotid gland tumor surgery is extremely unfortunate. In this case, immediate primary neurorrhaphy and systemic steroids are recommended to restore facial function and reduce cosmetic deficits.BACKGROUND Malnutrition is prevalent in patients with head and neck cancer (HNC), impacting on outcomes. Despite publication of best-practice nutrition care clinical guidelines, evidence-practice gaps persist. AIM This project aimed to understand the perspectives of patients and their caregivers about nutritional care and how their unmet supportive care needs can be better addressed in designing a new model of care (MOC). The results will contribute to documenting the barriers and enablers to implementing best practice nutrition care for patients with HNC. METHOD Qualitative interviews were conducted with patients who had completed radiotherapy with or without (+/-) other treatment modality (surgery and/or systematic therapy) of curative intent for HNC. Patients were purposively sampled from a major tertiary referral centre in Sydney, Australia. Patients' primary caregivers were also invited to participate if both parties consented. A semi-structured interview schedule was developed to elicit information about barriers and facilitators to change and inform development of the new MOC.