Consciousness

Flow in positive psychology, also known colloquially as being in the zone or locked in, is the mental state in which a person performing some activity is fully immersed in a feeling of energized focus, full involvement, and enjoyment in the process of the activity. In essence, flow is characterized by the complete absorption in what one does, and a resulting transformation in one's sense of time. Flow is the melting together of action and consciousness; the state of finding a balance between a skill and how challenging that task is. It requires a high level of concentration. Flow is used as a coping skill for stress and anxiety when productively pursuing a form of leisure that matches one's skill set.

First presented in the 1975 book Beyond Boredom and Anxiety by the Hungarian-American psychologist Mihály Csíkszentmihályi, the concept has been widely referred to across a variety of fields (and is particularly well recognized in occupational therapy).

In psychology, apprehension (Lat. ad, "to"; prehendere, "to seize") is a term applied to a model of consciousness in which nothing is affirmed or denied of the object in question, but the mind is merely aware of ("seizes") it.

"Judgment" (says Reid, ed. Hamilton, i. p. 414) "is an act of the mind, specifically different from simple apprehension or the bare conception of a thing". "Simple apprehension or conception can neither be true nor false." This distinction provides for the large class of mental acts in which we are simply aware of, or "take in" a number of familiar objects, about which we in general make no judgment, unless our attention is suddenly called by a new feature. Or again, two alternatives may be apprehended without any resultant judgment as to their respective merits.

The Latin cogito, ergo sum, usually translated into English as "I think, therefore I am", is the "first principle" of René Descartes' philosophy. He originally published it in French as je pense, donc je suis in his 1637 Discourse on the Method, so as to reach a wider audience than Latin would have allowed. It later appeared in Latin in his Principles of Philosophy, and a similar phrase (Ego sum, ego existo, 'I am, I exist') also featured prominently in his Meditations on First Philosophy. The dictum is also sometimes referred to as the cogito. As Descartes explained in a margin note, "we cannot doubt of our existence while we doubt." In the posthumously published The Search for Truth by Natural Light, he expressed this insight as dubito, ergo sum, vel, quod idem est, cogito, ergo sum ("I doubt, therefore I am—or what is the same—I think, therefore I am."). Antoine Léonard Thomas, in a 1765 essay in honor of Descartes, presented it as dubito, ergo cogito, ergo sum ("I doubt, therefore I think, therefore I am.").

Descartes's statement became a fundamental element of Western philosophy, as it purported to provide a certain foundation for knowledge in the face of radical doubt. While other knowledge could be a figment of imagination, deception, or mistake, Descartes asserted that the very act of doubting one's own existence served—at minimum—as proof of the reality of one's own mind; there must be a thinking entity—in this case the self—for there to be a thought.

The neural correlates of consciousness (NCC) are the minimal set of neuronal events and mechanisms sufficient for the occurrence of the mental states to which they are related. Neuroscientists use empirical approaches to discover neural correlates of subjective phenomena; that is, neural changes which necessarily and regularly correlate with a specific experience.

Élan vital (French pronunciation: [elɑ̃ vital]) is a term coined by French philosopher Henri Bergson in his 1907 book Creative Evolution, in which he addresses the question of self-organisation and spontaneous morphogenesis of things in an increasingly complex manner. Élan vital was translated in the English edition as "vital impetus", but is usually translated by his detractors as "vital force". It is a hypothetical explanation for evolution and development of organisms, which Bergson linked closely with consciousness – the intuitive perception of experience and the flow of inner time.

Neurophilosophy, or the philosophy of neuroscience, is the interdisciplinary study of neuroscience and philosophy that explores the relevance of neuroscientific studies to the arguments traditionally categorized as philosophy of mind. The term was first coined by Patricia Churchland in her book, Neurophilosophy: Toward a Unified Science of the Mind–Brain, which was published in 1986 by the MIT Press. Churchland was driven by the mind-body problem, which asks a highly-debated question of how the mind, which drives intangible, nonphysical mental processes, is related to the brain, a physical organ. This problem extends to the understanding of other relatively unknown phenomena, such as decision making, learning, consciousness, existence of free will, as well as other related topics. Churchland originally theorized that the physical brain was clearly relevant and, more importantly, necessary to discovering the nonphysical mind and its related mental processes since the only thing that exists is the physical brain. These beliefs were initially met with contention from contemporary philosophers, who typically misinterpreted her argument. Instead of understanding her argument as "necessary," many philosophers often implied that Churchland argued that a neural underpinning was both "necessary" and "sufficient." This line of thought is not without historical context as many classical philosophers, such as Plato, Descartes, and Chalmers, argued that mind and brain have no connection. Contemporary philosophers often argue that the many undiscovered problems in neuroscience will never allow a mechanism into solving cognition. Churchland argues that proponents of this belief do not understand that the field of neuroscience is relatively young and is bound by the unknowns of chemistry and physics. The philosophy of neuroscience attempts to clarify neuroscientific methods and results using the conceptual rigor and methods of philosophy of science.

A mental state, or a mental property, is a state of mind of a person. Mental states comprise a diverse class, including perception, pain/pleasure experience, belief, desire, intention, emotion, and memory. There is controversy concerning the exact definition of the term. According to epistemic approaches, the essential mark of mental states is that their subject has privileged epistemic access while others can only infer their existence from outward signs. Consciousness-based approaches hold that all mental states are either conscious themselves or stand in the right relation to conscious states. Intentionality-based approaches, on the other hand, see the power of minds to refer to objects and represent the world as the mark of the mental. According to functionalist approaches, mental states are defined in terms of their role in the causal network independent of their intrinsic properties. Some philosophers deny all the aforementioned approaches by holding that the term "mental" refers to a cluster of loosely related ideas without an underlying unifying feature shared by all. Various overlapping classifications of mental states have been proposed. Important distinctions group mental phenomena together according to whether they are sensory, propositional, intentional, conscious or occurrent. Sensory states involve sense impressions like visual perceptions or bodily pains. Propositional attitudes, like beliefs and desires, are relations a subject has to a proposition. The characteristic of intentional states is that they refer to or are about objects or states of affairs. 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.

Mental states are usually contrasted with physical or material aspects. For (non-eliminative) physicalists, they are a kind of high-level property that can be understood in terms of fine-grained neural activity. Property dualists, on the other hand, claim that no such reductive explanation is possible. Eliminativists may reject the existence of mental properties, or at least of those corresponding to folk psychological categories such as thought and memory. Mental states play an important role in various fields, including philosophy of mind, epistemology and cognitive science. In psychology, the term is used not just to refer to the individual mental states listed above but also to a more global assessment of a person's mental health.

In micro-sociology, interactionism is a theoretical perspective that sees social behavior as an interactive product of the individual and the situation. In other words, it derives social processes (such as conflict, cooperation, identity formation) from social interaction, whereby subjectively held meanings are integral to explaining or understanding social behavior.

This perspective studies the ways in which individuals shape, and are shaped by, society through their interactions. Interactionism thus argues that the individual is an active and conscious piece of the social-context system, rather than merely a passive object in their environment. It believes interactions to be guided by meanings that are attached to the self, to others with whom each individual interacts, and to situations of interaction; all of which are altered in interaction themselves. In this sense, interactionism may stand in contrast to studies of socialization, insofar as interactionism conceives individuals to influence groups at least as much as groups influence individuals.

Psychology is the scientific study of behavior and mind. Its subject matter includes the behavior of humans and nonhumans, both conscious and unconscious phenomena, and mental processes such as thoughts, feelings, and motives. Psychology is an academic discipline of immense scope, crossing the boundaries between the natural and social sciences. Biological psychologists seek an understanding of the emergent properties of brains, linking the discipline to neuroscience. As social scientists, psychologists aim to understand the behavior of individuals and groups.

A professional practitioner or researcher involved in the discipline is called a psychologist. Some psychologists can also be classified as behavioral or cognitive scientists. Some psychologists attempt to understand the role of mental functions in individual and social behavior. Others explore the physiological and neurobiological processes that underlie cognitive functions and behaviors.

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. A mildly depressed level of consciousness or alertness may be classed as lethargy; someone in this state can be aroused with little difficulty. People who are obtunded have a more depressed level of consciousness and cannot be fully aroused. Those who are not able to be aroused from a sleep-like state are said to be stuporous. Coma is the inability to make any purposeful response. Scales such as the Glasgow coma scale have been designed to measure the level of consciousness.

An altered level of consciousness can result from a variety of factors, including alterations in the chemical environment of the brain (e.g. exposure to poisons or intoxicants), insufficient oxygen or blood flow in the brain, and excessive pressure within the skull. Prolonged unconsciousness is understood to be a sign of a medical emergency. A deficit in the level of consciousness suggests that both of the cerebral hemispheres or the reticular activating system have been injured. A decreased level of consciousness correlates to increased morbidity (sickness) and mortality (death). Thus it is a valuable measure of a patient's medical and neurological status. In fact, some sources consider level of consciousness to be one of the vital signs.