Bayne et al. (2020) [1] envision the fascinating possibility that disconnected hemispheres (through hemispherotomy), ex cranio brains, and cerebral organoids may be islands of awareness (IOAs). They defined IOAs as systems fully disconnected from the external surrounding, both in terms of input (i.e., sensory information) and output (i.e., motor responses), yet capable of conscious experience (i.e., aware). In order to test whether these islands are effectively aware, the authors propose to use measures of human/animal consciousness that have beenwell validated in human/animal settings by correlation with pretheoretical measures of consciousness (e.g., behavioural reports) or subjective reports (in the case of humans). In particular, Bayne et al. [1] mention: (i) measures of dynamical complexity, capturing both integration and differentiation of the detected brain signal, such as the perturbational complexity index (PCI); and (ii) measures of algorithm complexity of EEG (i.e., entropy measures), quantifying the randomness of brain dynamics and capturing mainly the differentiation of the recorded brain activity. Two questions come tomind: one of a theoretical and one of a methodological kind. (i) Can subjective experience be collapsed to a 1D entity (i.e., a certainmeasure of cortical complexity)? (ii) If we accept such reduction, can measures validated in one context generalize to different species and neural systems?

中文翻译：

---

意识孤岛还是皮质复杂性？

贝恩等人。(2020) [1] 设想了一种迷人的可能性，即断开的半球（通过半球切开术）、前颅脑和大脑类器官可能是意识岛 (IOA)。他们将 IOA 定义为在输入（即感觉信息）和输出（即运动反应）方面与外部环境完全断开的系统，但能够进行有意识的体验（即有意识）。为了测试这些岛屿是否具有有效意识，作者建议使用在人类/动物环境中通过与预理论意识测量（例如行为报告）或主观报告（在人类/动物环境中）相关联的人类/动物意识测量。人的情况）。特别是，贝恩等人。[1] 提到：(i) 动态复杂性的度量，捕获检测到的大脑信号的整合和分化，例如扰动复杂性指数（PCI）；(ii) EEG 算法复杂度的度量（即熵度量），量化大脑动力学的随机性并主要捕获记录的大脑活动的差异。想到了两个问题：一个是理论问题，一个是方法论问题。(i) 主观体验能否被折叠成一维实体（即皮质复杂性的某种度量）？(ii) 如果我们接受这种减少，在一种情况下验证的措施是否可以推广到不同的物种和神经系统？量化大脑动力学的随机性并主要捕获记录的大脑活动的差异。想到了两个问题：一个是理论问题，一个是方法论问题。(i) 主观体验能否被折叠成一维实体（即皮质复杂性的某种度量）？(ii) 如果我们接受这种减少，在一种情况下验证的措施是否可以推广到不同的物种和神经系统？量化大脑动力学的随机性并主要捕获记录的大脑活动的差异。想到了两个问题：一个是理论问题，一个是方法论问题。(i) 主观体验能否被折叠成一维实体（即皮质复杂性的某种度量）？(ii) 如果我们接受这种减少，在一种情况下验证的措施是否可以推广到不同的物种和神经系统？