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There are some brain states in which consciousness seems to be absent, including dreamless sleep or coma. There are also a variety of circumstances that can change the relationship between the mind and the world in less drastic ways, producing what are known as altered states of consciousness.
A first summary of the existing literature was carried out by Charles T. Tart in his book Altered the States of Consciousness, which led to a more common use of the term. [23] Tart coined the key terms discrete [note 2] and baseline states of consciousness and thought about a general classification system for ASCs. [24]
The APZ (Abnormal Mental States) questionnaire is one of the most widely used psychometric scales for assessing subjective experiences of altered states of consciousness. [1] First published in 1998 by Adolf Dittrich, the APZ questionnaire comprises three dimensions: "Oceanic Boundlessness (OSE)", "Dread of Ego Dissolution (AIA)" and "Visionary ...
Conscious states are part of the phenomenal experience while occurrent states are causally efficacious within the owner's mind, with or without consciousness. An influential classification of mental states is due to Franz Brentano, who argues that there are only three basic kinds: presentations, judgments, and phenomena of love and hate.
Higher consciousness (also called expanded consciousness) is a term that has been used in various ways to label particular states of consciousness or personal development. [1] It may be used to describe a state of liberation from the limitations of self-concept or ego , as well as a state of mystical experience in which the perceived separation ...
An altered level of consciousness is any measure of arousal other than normal. Level of consciousness (LOC) is a measurement of a person's arousability and responsiveness to stimuli from the environment. [1] A mildly depressed level of consciousness or alertness may be classed as lethargy; someone in this state can be aroused with little ...
The NCC are defined to constitute the minimal set of neuronal events and mechanisms sufficient for a specific conscious percept, and consequently sufficient for consciousness. In this formalism, consciousness is viewed as a state-dependent property of some undefined complex, adaptive, and highly interconnected biological system. [3] [4] [5]
It claims that a mental state is conscious when it is the subject of a higher-order thought (HOT). Phenomenal consciousness in particular corresponds to certain kinds of mental states (e.g., visual inputs) that are the subjects of HOTs. Rosenthal excludes the special case in which one learns about one's lower-order states by conscious deduction.