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The Frontal Pole and Cognitive Insight in Schizophrenia
Psychiatry Research: Neuroimaging ( IF 2.1 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.pscychresns.2020.111236
Vikas B. Raju , Ayushi Shukla , Arpitha Jacob , Rose Dawn Bharath , Vijay KG Kumar , Shivarama Varambally , Ganesan Venkatasubramanian , Naren P. Rao

Absence of insight owing to impaired self-reflection and lack of touch with reality is a hallmark of schizophrenia. Functional imaging studies in healthy individuals have implicated the frontal pole (FP), sub-division of the prefrontal cortex in self-reflective processes. Despite the significance of self-referential processing in the pathogenesis of schizophrenia, the relationship between FP volume and cognitive insight in this disorder is underexplored. We examined the relationship between cognitive insight and volume of FP using precise manual morphometry of high resolution magnetic resonance images in 19 schizophrenia patients (SCZ) and 21 healthy-volunteers (HV). The manual morphometry technique was replicated from a previous study based on a cytoarchitectonically and functionally valid definition of FP and cognitive insight was measured using Beck's cognitive insight scale. Left frontal pole volume was a significant predictor of self-reflection sub-score of Beck's cognitive insight scale (β=0.68; t = 2.86; p = 0.01). A significant inverse relationship between age and bilateral FP volumes was noted in HV (left FP - r=-0.45; p = 0.04; right FP - r=-0.57; p = 0.008) but not in SCZ (p>0.05). Our findings provide anatomical substrates to devise intervention strategies targeting cognitive insight, thereby improving treatment adherence and functional outcomes.

中文翻译:

精神分裂症的额极和认知洞察力

由于自我反省受损和缺乏与现实接触而缺乏洞察力是精神分裂症的标志。健康个体的功能成像研究涉及额极 (FP),即自我反射过程中前额叶皮层的细分。尽管自我参照处理在精神分裂症的发病机制中具有重要意义,但在这种疾病中 FP 量与认知洞察力之间的关系尚未得到充分探索。我们在 19 名精神分裂症患者 (SCZ) 和 21 名健康志愿者 (HV) 中使用高分辨率磁共振图像的精确手动形态测量学检查了认知洞察力与 FP 体积之间的关系。手动形态测量技术从先前的研究中复制而来,该研究基于 FP 的细胞结构和功能有效定义,并且使用贝克的认知洞察量表测量了认知洞察力。左额极体积是贝克认知洞察量表的自我反思子分数的重要预测因子(β=0.68;t=2.86;p=0.01)。在 HV(左 FP - r=-0.45;p = 0.04;右 FP - r=-0.57;p = 0.008)中注意到年龄和双侧 FP 体积之间存在显着的负相关关系,但在 SCZ 中没有(p>0.05)。我们的研究结果为设计针对认知洞察力的干预策略提供了解剖学基础,从而提高了治疗依从性和功能结果。s 认知洞察量表(β=0.68;t=2.86;p=0.01)。在 HV(左 FP - r=-0.45;p = 0.04;右 FP - r=-0.57;p = 0.008)中注意到年龄和双侧 FP 体积之间存在显着的负相关关系,但在 SCZ 中没有(p>0.05)。我们的研究结果为设计针对认知洞察力的干预策略提供了解剖学基础,从而提高了治疗依从性和功能结果。s 认知洞察量表(β=0.68;t=2.86;p=0.01)。在 HV(左 FP - r=-0.45;p = 0.04;右 FP - r=-0.57;p = 0.008)中注意到年龄和双侧 FP 体积之间存在显着的负相关关系,但在 SCZ 中没有(p>0.05)。我们的研究结果为设计针对认知洞察力的干预策略提供了解剖学基础,从而提高了治疗依从性和功能结果。
更新日期:2021-02-01
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