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• W3199277558 abstract "To investigate the effects of gender and age on the posterior cranial fossa linear volume and cerebellar tonsil position in normal populations.A total of 180 normal adults who underwent cervical MRI examination at the physical examination center were selected, including 90 males and 90 females; the age ranged from 20 to 79 years, with an average of 50.4 years. The posterior cranial fossa linear volume and cerebellar tonsil position were measured by two spine surgeons on the mid-sagittal plane of the cervical MRI T2-weighted image. The posterior cranial fossa linear volume included the length of clivus (AB), anteroposterior diameter of foramen magnum (BC), length of supraocciput (CD), anteroposterior diameter of posterior fossa (DA), posterior fossa height (BE), and clivus angle (∠α). The index of the cerebellar tonsil position was the distance from the lower edge of the cerebellar tonsil to the baseline (MN). The differences of each indicators between males and females were compared, and the correlations between age and each indicators were analyzed.The posterior fossa cranial linear volume AB, BC, CD, BE, and ∠α in males were significantly larger than those in females ( P<0.05); DA in males was larger than that in females, but showing no significant difference ( t=1.978, P=0.050). The cerebellar tonsil position (MN) in females was higher than that in males, but showing no significant difference ( t=0.526, P=0.600). Correlation analysis showed that age was negatively correlated with AB, BC, CD, DA, BE, ∠α, and MN ( r=-0.375, P=0.001; r=-0.417, P=0.001; r=-0.046, P=0.001; r=-0.244, P=0.001; r=-0.326, P=0.001; r=-0.320, P=0.001; r=-0.334, P=0.001).The posterior cranial fossa linear volume of normal adults is significantly larger in males than in females; the posterior cranial fossa linear volume and the cerebellar tonsil position may have a decreasing process of age-related degeneration.探讨性别及年龄对正常成人后颅窝线性容积及小脑扁桃体下缘位置的影响。.选取体检中心行颈椎 MRI 检查的正常成人 180 例，男 90 例，女 90 例；年龄 20～79 岁，平均 50.4 岁。由 2 名脊柱外科医师于颈椎 MRI T2 加权像正中矢状位层面上行后颅窝线性容积及小脑扁桃体下缘位置影像学测量。后颅窝线性容积指标包括：斜坡长度（AB）、枕骨大孔前后径（BC）、枕骨鳞部长度（CD）、后颅窝矢状径（DA）、后颅窝高径（BE）、斜坡倾斜角（∠α）；小脑扁桃体下缘位置指标为 MN，即小脑扁桃体下缘至基线的距离。比较男女性别组间各指标差异，并行 Pearson 相关分析年龄与各指标的关系。.后颅窝线性容积指标 AB、BC、CD、BE、∠α 男性均大于女性，差异有统计学意义（ P<0.05）；男性 DA 亦大于女性，但差异无统计学意义（ t=1.978， P=0.050）。小脑扁桃体下缘位置指标 MN 女性高于男性，差异无统计学意义（ t=0.526， P=0.600）。相关性分析显示，年龄与 AB、BC、CD、DA、BE、∠α、MN 均成负相关（ r=−0.375， P=0.001； r=−0.417， P=0.001； r=−0.046， P=0.001； r=−0.244， P=0.001； r=−0.326， P=0.001； r=−0.320， P=0.001； r=−0.334， P=0.001）。.正常成人的后颅窝线性容积男性显著大于女性；后颅窝容积及小脑扁桃体下缘位置可能存在增龄性退变减小的变化过程。." @default.
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• W3199277558 date "2021-09-15" @default.
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• W3199277558 title "[Effects of age and gender on posterior cranial fossa linear volume and cerebellar tonsil position in normal populations]." @default.
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• W3199277558 doi "https://doi.org/10.7507/1002-1892.202103158" @default.
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