Homeostatic feeling is a class of feelings (e.g. thirst, fatigue, pain, desire, malaise, well-being) that inform us about our physiological condition. In his earlier work
Antonio Damasio
Antonio Damasio (; born 25 February 1944) is a Portuguese neuroscientist. He is currently the David Dornsife Chair in Neuroscience, as well as Professor of Psychology, Philosophy, and Neurology, at the University of Southern California, and, add ...
used "primordial feeling" but he now prefers the term "homeostatic feeling" for the class.
Affective neuroscientist,
Jaak Panksepp, identified homeostatic feeling as one of three primary classes of
affect:
*homeostatic affect: e.g., thirst, fatigue
*sensory affect: e.g., touch, warmth
*emotional affect: e.g., anger, fear.
Some homeostatic feelings motivate specific behavior aimed at maintaining the body in its ideal state. For example, hunger motivates eating, fatigue motivates resting and hyperthermia motivates stepping into the shade.

Neuroscientist
Derek Denton called these ''motivating'' homeostatic feelings "primordial emotions" and defined them as "the subjective element of the instincts, which are the genetically programmed behaviour patterns which contrive
homeostasis
In biology, homeostasis (British English, British also homoeostasis; ) is the state of steady internal physics, physical and chemistry, chemical conditions maintained by organism, living systems. This is the condition of optimal functioning fo ...
. They include thirst, hunger for air, hunger for food, pain, hunger for specific minerals etc. There are two constituents of a primordial emotionthe specific sensation which when severe may be imperious, and the compelling intention for gratification by a consummatory act."
Neuroanatomist
Arthur Craig called these motivating homeostatic feelings "homeostatic emotions" and found that humans and
anthropoid primates form an image of all of the body's unique homeostatic sensations in the brain's primary interoceptive cortex (located in the dorsal posterior
insula). This image is re-represented in the mid- and anterior insula, and the anterior insula (modified by input from cognitive, affective and reward-related circuits) plays a role in conscious awareness of the whole body's homeostatic state. A sensation re-represented in the anterior insula and that sensation's related motivation (involving neural activity in the
anterior cingulate cortex
In human brains, the anterior cingulate cortex (ACC) is the frontal part of the cingulate cortex that resembles a "collar" surrounding the frontal part of the corpus callosum. It consists of Brodmann areas 24, 32, and 33.
It is involved ...
and other regions) form a homeostatic emotion.
Consciousness
Derek Denton proposed that primordial emotions are the likely incubators of consciousness in evolution; that a kind of non-reflective consciousness evolved along with these feelings and before the emergence of cognition. This opposes the view put by
Edelman and others that consciousness emerged after the development of cognitive processes such as the ability to create a scene from diverse sensory inputs.
[Jablonka E & Ginsberg S (2006) Book review. Journal of Consciousness Studies, 13(6) pp. 97–122]
Denton saw the evolution of consciousness as a gradual, continuous process, beginning in the brain's most primitive regions with non-reflective consciousness of instincts, followed by the emergence of reflective consciousness of these instincts, then reflective consciousness of surroundings evolves, followed by the emergence of reflective consciousness of memories and behavioural options.
[
Antonio and Hanna Damasio, too, observe, "It is likely that homeostatic feelings were the inaugural phenomena of consciousness in evolution ..." and they propose that "homeostatic feelings were selected y evolutionbecause the spontaneous information they provided regarding the current state of life regulation conferred extraordinary advantages to the respective organisms. The ‘knowledge’ carried by conscious homeostatic feelings enabled overt guidance of life regulation."
Antonio Damasio in his 2021 book, "Feeling and Knowing", argues that without ongoing awareness of our homeostatic state, no other mode of consciousness (such as awareness of surroundings, memories and self) is possible.]
See also
* Interoception
Interoception is the collection of Sense#Other internal sensations and perceptions, senses providing information to the organism about the internal state of the body. This can be both conscious and subconscious. It encompasses the brain's process ...
References
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Emotion
Limbic system
Mental processes