Psychoanalysis and the brain - why did freud abandon neuroscience?

Unpacking the Concept of Otherness: Philosophical and Psychological Perspectives

Otherness is a complex and polysemic notion that is conceptualized in both philosophy and psychology. The paper examines otherness as a universal phenomenon of the human psyche that manifests in relation to oneself and interpersonal relationships with others. Philosophical ideas, including those of Hegel, Lévinas and Waldenfels, are introduced as providing essential theoretical background for psychological studies of otherness. The psychological section deals with otherness from various perspectives, with emphasis on internal processes of an individual, drawing on theories within psychoanalytical and intrapsychic traditions, as well as the intersection of otherness and identity. Otherness is introduced as a variable influencing complex individual and social processes, such as the perception of individuals and groups. Finally, a taxonomy of otherness is proposed that reflects the multifaceted nature of the concept and could help navigate the existing literature as well as guide new studies.

Ongoing Brain Activity and Its Role in Cognition: Dual versus Baseline Models

What is the role of the brain's ongoing activity for cognition? The predominant perspectives associate ongoing brain activity with resting state, the default-mode network (DMN), and internally oriented mentation. This triad is often contrasted with task states, non-DMN brain networks, and externally oriented mentation, together comprising a "dual model" of brain and cognition. In opposition to this duality, however, we propose that ongoing brain activity serves as a neuronal baseline; this builds upon Raichle's original search for the default mode of brain function that extended beyond the canonical default-mode brain regions. That entails what we refer to as the "baseline model." Akin to an internal biological clock for the rest of the organism, the ongoing brain activity may serve as an internal point of reference or standard by providing a shared neural code for the brain's rest as well as task states, including their associated cognition. Such shared neural code is manifest in the spatiotemporal organization of the brain's ongoing activity, including its global signal topography and dynamics like intrinsic neural timescales. We conclude that recent empirical evidence supports a baseline model over the dual model; the ongoing activity provides a global shared neural code that allows integrating the brain's rest and task states, its DMN and non-DMN, and internally and externally oriented cognition.

"Project for a Spatiotemporal Neuroscience" - Brain and Psyche Share Their Topography and Dynamic

What kind of neuroscience does psychoanalysis require? At his time, Freud in his "Project for a Scientific Psychology" searched for a model of the brain that could relate to incorporate the psyche's topography and dynamic. Current neuropsychoanalysis builds on specific functions as investigated in Affective and Cognitive (and Social) Neuroscience including embodied approaches. The brain's various functions are often converged with prediction as operationalized in predictive coding (PC) and free energy principle (FEP) which, recently, have been conceived as core for a "New Project for Scientific Psychology." We propose to search for a yet more comprehensive and holistic neuroscience that focuses primarily on its topography and dynamic analogous to Freud's model of the psyche. This leads us to what we describe as "Spatiotemporal Neuroscience" that focuses on the spatial topography and temporal dynamic of the brain's neural activity including how they shape affective, cognitive, and social functions including PC and FEP (first part). That is illustrated by the temporally and spatially nested neural hierarchy of the self in the brain's neural activity (second and third part). This sets the ground for developing our proposed "Project for a Spatiotemporal Neuroscience," which complements and extends both Freud's and Solms' projects (fourth part) and also carries major practical implications as it lays the ground for a novel form of neuroscientifically informed psychotherapy, namely, "Spatiotemporal Psychotherapy." In conclusion, "Spatiotemporal Neuroscience" provides an intimate link of brain and psyche by showing topography and dynamic as their shared features, that is, "common currency."

The Universality of Science and Traditional Chinese Medicine: A Philosophical Survey

This paper represents a philosophical appraisal of Traditional Chinese Medicine (TCM) from the point of view of the philosophy of science. As it is generally the case with other versions of Traditional Medicine, rather than a coherent research program Traditional Chinese Medicine constitutes an array of various techniques and practices coupled with a diversity of very different speculative doctrines regarding the physiological structure of certain body parts as well as the purported etiology of disease and malfunction. This chapter starts off by describing some of the theoretical assumptions on which TCM relies with the aim of casting light on whether they, alongside the clinical techniques TCM encompasses, can significantly be considered as a scientific theory comparable with that of conventional medicine. In so doing the chapter examines a plurality of demarcation criteria between science and non-science coming from various existing philosophical frameworks old and new. While, as will be shown, a wealth of research based on RCTs (randomized control trials) points out that TCM´s degree of effectiveness is low, that is not the point this paper intends to make. Instead of such an empirical criticism, the author sustains a comparably stronger epistemic contention, namely: even if the clinical results of TCM fared better than they actually do, that observation alone would not be a good reason to consider this branch of traditional medicine as a scientifically respectable endeavor.

The psychoanalysis-neurosciences interface: A proposal for a hypothetical unification of psychoanalytic models

Grotstein's concept of projective transidentification led the author to reconsider the reasons that have led to the plurality of psychoanalytic models. The solution proposed is the existence of a fundamental frontal-occipital oscillatory dynamic, responsible for the projective-introjective dynamic that is at the basis of psychoanalytic theory and, at the same time, of the development and maintenance of mother-infant attunement. Such an oscillatory dynamic, according to this perspective, operates as a "bridge" between two seminal theoretical models of development - the psychoanalytic and the infant research model. A set of neurological hypotheses regarding how maternal interaction may act to modify the infant's projective-introjective dynamic and general brain development is proposed. The different possible modifications of this dynamic offer an explanation of the variety and complexity of psychoanalytic models and the opportunity for a unitary approach, both clinical and theoretical. Given that it is considered to be the basis for cerebral activity, the oscillatory dynamic appears intrinsically connected with the default mode network's functions of Self-cohesiveness and environmental monitoring, suggesting an important interface between psychoanalysis and the neurosciences.

Dualism and the 'Difficult Patient': Why Integrating Neuroscience Matters

Patients with psychiatric illness present a unique challenge to clinicians: in contrast to the traditional medical model, in which patients are conceptualized as being stricken by a disease, patients with certain psychiatric illnesses may seem complicit with the illness. Questions of free will, choice, and the role of the physician can cause clinicians to feel helpless, disinterested, or even resentful. These tensions are a lasting legacy of centuries of mind-body dualism. Over the past several decades, modern tools have finally allowed us to break down this false dichotomy. Integrating a modern neuroscience perspective into practice allows clinicians to conceptualize individuals with psychiatric illness in a way that promotes empathy and enhances patient care. Specifically, a strong grasp of neuroscience prevents clinicians from falling into the trap in which behavioral aspects of a patient's presentation are perceived as being somehow separate from the disease process. We demonstrate the value of incorporating neuroscience into a biopsychosocial formulation through the example of a "difficult patient."

Neuronal variability of Resting State activity in Eating Disorders: increase and decoupling in Ventral Attention Network and relation with clinical symptoms

Background:

Despite the great number of resting state functional connectivity studies on Eating Disorders (ED), no biomarkers could be detected yet. Therefore, we here focus on a different measure of resting state activity that is neuronal variability. The objective of this study was to investigate neuronal variability in the resting state of women with ED and to correlate possible differences with clinical and psychopathological indices.

Methods:

58 women respectively 25 with Anorexia Nervosa (AN), 16 with Bulimia Nervosa (BN) and 17 matched healthy controls (CN) were enrolled for the study. All participants were tested with a battery of psychometric tests and underwent a functional Magnetic Resonance Imaging (fMRI) resting state scanning. We investigated topographical patterns of variability measured by the Standard Deviation (SD) of the Blood-Oxygen-Level-Dependent (BOLD) signal (as a measure of neuronal variability) in the resting-state and their relationship to clinical and psychopathological indices.

Results:

Neuronal variability was increased in both anorectic and bulimic subjects specifically in the Ventral Attention Network (VAN) compared to healthy controls. No significant differences were found in the other networks. Significant correlations were found between neuronal variability of VAN and various clinical and psychopathological indices.

Conclusions:

We here show increased neuronal variability of VAN in ED patients. As the VAN is relevant for switching between endogenous and exogenous stimuli, our results showing increased neuronal variability suggest unstable balance between body attention and attention to external world. These results offer new perspective on the neurobiological basis of ED. Clinical and therapeutic implication will be discussed.

Large-scale brain networks and Freudian ego

Sigmund Freud, the founder of psychoanalysis, is predominantly known for his conception of the id, ego and super-ego, representing a part of his meta-psychology of the psychic apparatus. Nowadays, with the advancements in technology and science, his meta-psychological structural model of the psyche might be either confirmed or denied by comparing the account of the psychic apparatus of the classical psychoanalysis to the newest findings in neuropsychology and cognitive neuroscience. Indeed, the founded interdisciplinary project of neuro-psychoanalysis strives to answer such questions. In this article, the current thinking on the discussions around Freudian ego and its possible brain correlates is presented. In 2010, Robin Carhart-Harris and Karl Friston introduced a neuro-psychoanalytic account of the psychic apparatus, where the ego correlated with a large-scale brain network called the default-mode network. In the end of this paper, an original theoretical hypothesis is offered, supplemented with review of the literature, namely that the central-executive network and the salience network are viewed as the true representatives of Freudian ego. The offered hypothesis criticizes Carhart-Harris and Friston’s postulating of the default-mode network as being the brain representative of Freudian ego.

Facts and Sensibilities: What Is a Psychoanalytic Innovation?

Psychoanalytic innovation is easy to recognize but difficult to define. There is a dearth of literature exploring the nature of innovation in our field. My main thesis is that psychoanalytic innovation can be of two types. Psychoanalytic innovation of the first order is about new discoveries concerning facts related to the psyche, development, transference relations, or psychopathology. It usually emerges as a development of insights from canonical psychoanalytic theory; offers an original explanation for a choice of empirical psychic phenomena hitherto unexamined; is perceived as creative and useful when it succeeds to reconceptualize the relations between the patient's past, unconscious dynamics, and the transference relations; often resembles poetic expression; and registers a truth we knew but did not yet put into words. When it is of the second order, psychoanalytic innovation challenges either methodological or philosophical assumptions held by psychoanalysis, without pretending to replace existing theories. It constitutes a "sensibility" that its adherents strive to incorporate into the existing corpus. I distinguish between two types of sensibilities: cultural -philosophical sensibility represented by the relational approach; and methodological sensibility represented by infant research, and neuropsychoanalysis. In the last part of the paper I analyze psychoanalytic progress pointing to its merits and shortcomings.

Beyond Broca's area: why undergraduate neuroscience education matters

Patients with psychiatric illness often present a unique challenge to medical students: in contrast to some medical conditions, in which patients may seem to be stricken by a disease, patients with certain psychiatric illnesses may seem complicit with the illness. Questions of free will, choice, and the role of the physician can quickly become overwhelming. This may result in students feeling helpless, disinterested, or even resentful. Here we argue that integrating a modern neuroscience perspective into medical education allows students to conceptualize psychiatric patients in a way that promotes empathy and enhances patient care. Specifically, a strong grasp of neuroscience prevents the future physician from falling into dualistic thinking in which the psychosocial aspects of a patient's presentation are considered beyond the realm of medicine. The value of incorporating neuroscience into a full, biopsychosocial formulation is demonstrated with the case example of a "difficult patient."

Re-enacting the Bodily Self on Stage: Embodied Cognition Meets Psychoanalysis

The embodied approach to cognition consists in a range of theoretical proposals sharing the idea that our concepts are constitutively shaped by the physical and social constraints of our body and environment. Still far from a mutually enriching interplay, in recent years embodied and psychoanalytic approaches are converging on similar constructs as the ones of intersubjectivity, bodily self, and affective quality of verbal communication. Some efforts to cope with the sentient subject were already present in classical cognitivism: having expunged desires and conflicts from the cognitive harmony, bodily emotions re-emerged but only as a noisy dynamic friction. In contrast, the new, neural, embodied cognitive science with its focus on bodily effects/affects has enabled a dialogue between neuro-cognitive perspectives and clinic-psychological ones, through shared conceptual frameworks. I will address crucial issues that should be faced on this reconciling path. With reference to two kinds of contemporary addictions - internet addiction disorder and eating disorders - I will introduce a possible therapeutic approach that is built upon the core role of the acting-sentient bodily self in a dynamic-social and affective environment. In Psychoanalytic Psychodrama, the spontaneous re-enactment of a past (socially and physically constrained) experience is actualized by means of the other, the Auxiliary Ego. This allows homeostatic and social-emotional affects, i.e., drives and instincts, to be re-experienced by the agent, the Protagonist, in a safe scenario. The director-psychoanalyst smoothly traces back this simulation to the motivated, and constrained, early proximal embodied interactions with significant others, and to the related instinctual conflicting aims. The psychoanalytic reframing of classical psychodrama does not merely exploit its original cathartic function, rather stands out for exploring the interpersonal constitution of the self, through an actual "re-somatization" of psychoanalytic therapy. Unspoken/unspeakable feelings pop up on stage: the strength of this treatment mainly rests on re-establishing the priority of the embodied Self over the narrative Self. By pointing out the possible conflicts between these two selves, this method can broaden the embodied cognition perspective. The psychodramatic approach will be briefly discussed in light of connectionist models, to finally address linguistic and methodological pivotal issues.

The Experience of Pleasure: A Perspective Between Neuroscience and Psychoanalysis

Pleasure is more than a mere sensory event, but rather it can be conceptualized as a complex, multiform experience involving memory, motivation, homeostasis, and, sometimes, negative affects. According to Freud, affect is a perceptual modality that registers the internal drive state of the subject rather than the objective experience of the external world, and the quality of this perceptual modality is calibrated in degrees of pleasure and displeasure. Within this conceptual framework, the aim of drive is always pleasure, and objects become significant in so far as they provide a way of discharging drives pressure. Subsequent conceptual psychoanalytic developments have partially rejected such metapsychological theorizations, postulating that other intrinsic motivations that are independent from libido can be observed in humans. Intrinsic motivation broadly refers to a set of psychological concepts including the inherent propensity to pursue one's choices, to seek out novelty and challenges, to satisfy curiosity and competence, and to extend one's capacities and control over events. What these concepts have in common is an inner endorsement of one's action, which is the sense that action is self-generated and is one's own. The notions of pleasure, drives, and affects are all of utmost importance for a neuropsychoanalytic understanding of mental functioning, due to their capability to explain desire, thought, and behavior from the perspective of human subjective experience. The purpose of this paper is thus to discuss psychoanalytic conceptual developments that have addressed pleasure, drives, and affects, in the light of recent findings coming from neurosciences. In particular, we will explore for insights from Panksepp's theory of primary-process emotional feelings, including the notion of "wanting" and "liking" as dissociable components of reward. In the last part of the paper, we will indicate possible theoretical implications for a neuropsychoanalytic understanding of libido-independent intrinsic motivations and their relationship with the self, including neuroscientific observations on self-related processes, agency, body-ownerships, and attachment.

Sigmund Freud-early network theories of the brain

Since the early days of modern neuroscience, psychological models of brain function have been a key component in the development of new knowledge. These models aim to provide a framework that allows the integration of discoveries derived from the fundamental disciplines of neuroscience, including anatomy and physiology, as well as clinical neurology and psychiatry. During the initial stages of his career, Sigmund Freud (1856-1939), became actively involved in these nascent fields with a burgeoning interest in functional neuroanatomy. In contrast to his contemporaries, Freud was convinced that cognition could not be localised to separate modules and that the brain processes cognition not in a merely serial manner but in a parallel and dynamic fashion-anticipating fundamental aspects of current network theories of brain function. This article aims to shed light on Freud's seminal, yet oft-overlooked, early work on functional neuroanatomy and his reasons for finally abandoning the conventional neuroscientific "brain-based" reference frame in order to conceptualise the mind from a purely psychological perspective.

The Interface between Neuroscience and Neuro-Psychoanalysis: Focus on Brain Connectivity

Over the past 20 years, the advent of advanced techniques has significantly enhanced our knowledge on the brain. Yet, our understanding of the physiological and pathological functioning of the mind is still far from being exhaustive. Both the localizationist and the reductionist neuroscientific approaches to psychiatric disorders have proven to be largely unsatisfactory and are outdated. Accruing evidence suggests that psychoanalysis can engage the neurosciences in a productive and mutually enriching dialogue that may further our understanding of psychiatric disorders. In particular, advances in brain connectivity research have provided evidence supporting the convergence of neuroscientific findings and psychoanalysis and helped characterize the circuitry and mechanisms that underlie higher brain functions. In the present paper we discuss how knowledge on brain connectivity can impact neuropsychoanalysis, with a particular focus on schizophrenia. Brain connectivity studies in schizophrenic patients indicate complex alterations in brain functioning and circuitry, with particular emphasis on the role of cortical midline structures (CMS) and the default mode network (DMN). These networks seem to represent neural correlates of psychodynamic concepts central to the understanding of schizophrenia and of core psychopathological alterations of this disorder (i.e., ego disturbances and impaired primary process thinking).

Anomalous Experiences, Trauma, and Symbolization Processes at the Frontiers between Psychoanalysis and Cognitive Neurosciences

Anomalous or exceptional experiences are uncommon experiences which are usually interpreted as being paranormal by those who report them. These experiences have long remained difficult to explain, but current progress in cognitive neuroscience and psychoanalysis sheds light on the contexts in which they emerge, as well as on their underlying processes. Following a brief description of the different types of anomalous experiences, we underline how they can be better understood at the frontiers between psychoanalysis and cognitive neurosciences. In this regard, three main lines of research are discussed and illustrated, alongside clinical cases which come from a clinical service specializing in anomalous experiences. First, we study the links between anomalous experiences and hallucinatory processes, by showing that anomalous experiences frequently occur as a specific reaction to negative life events, in which case they mainly take the form of non-pathological hallucinations. Next, we propose to analyze these experiences from the perspective of their traumatic aspects and the altered states of consciousness they often imply. Finally, these experiences are considered to be the consequence of a hypersensitivity that can be linked to an increase in psychic permeability. In conclusion, these different processes lead us to consider anomalous experiences as primary forms of symbolization and transformation of the subjective experience, especially during, or after traumatic situations.

The Task before Psychiatry Today Redux: STSPIR*

This paper outlines six important tasks for psychiatry today, which can be put in short as:

Spread and scale up services;

Talk;

Science,

Psychotherapy;

Integrate; and

Research excellence.

As an acronym, STSPIR.

Spread and scale up services: Spreading mental health services to uncovered areas, and increasing facilities in covered areas:

Mental disorders are leading cause of ill health but bottom of health agenda;

Patients face widespread discrimination, human rights violations and lack of facilities;

Need to stem the brain drain from developing countries;

At any given point, 10% of the adult population report having some mental or behavioural disorder;

In India, serious mental disorders affect nearly 80 million people, i.e. combined population of the northern top of India, including Punjab, Haryana, Jammu and Kashmir, Uttarakhand and Himachal Pradesh;

Combating imbalance between burden of demand and supply of efficient psychiatric services in all countries, especially in developing ones like India, is the first task before psychiatry today. If ever a greater role for activism were needed, this is the field;

The need is to scale up effective and cost-effective treatments and preventive interventions for mental disorders.

Talk: Speaking to a wider audience about positive contributions of psychiatry:

Being aware of, understanding, and countering, the massive anti-psychiatry propaganda online and elsewhere;

Giving a firm answer to anti-psychiatry even while understanding its transformation into mental health consumerism and opposition to reckless medicalisation;

Defining normality and abnormality;

Bringing about greater precision in diagnosis and care;

Motivating those helped by psychiatry to speak up;

Setting up informative websites and organising programmes to reduce stigma and spread mental health awareness;

Setting up regular columns in psychiatry journals around the globe, called ‘Patients Speak’, or something similar, wherein those who have been helped get a chance to voice their stories.

Science: Shrugging ambivalence and disagreement and searching for commonalities in psychiatric phenomena;

An idiographic orientation which stresses individuality cannot, and should not, preclude the nomothetic or norm laying thrust that is the crux of scientific progress.

The major contribution of science has been to recognize such commonalities so they can be researched, categorized and used for human welfare.

It is a mistake to stress individuality so much that commonalities are obliterated.

While the purpose and approach of psychiatry, as of all medicine, has to be humane and caring, therapeutic advancements and aetiologic understandings are going to result only from a scientific methodology.

Just caring is not enough, if you have not mastered the methods of care, which only science can supply.

Psychotherapy: Psychiatrists continuing to do psychotherapy:

Psychotherapy must be clearly defined, its parameters and methods firmly delineated, its proof of effectiveness convincingly demonstrated by evidence based and controlled trials;

Psychotherapy research suffers from neglect by the mainstream at present, because of the ascendancy of biological psychiatry;

It suffers resource constraints as major sponsors like pharma not interested;

Needs funding from some sincere researcher organisations and altruistic sponsors, as also professional societies and governments;

Psychotherapy research will have to provide enough irrefutable evidence that it works, with replicable studies that prove it across geographical areas;

It will not do for psychiatrists to hand over psychotherapy to clinical psychologists and others.

Integrate approaches: Welcoming biological breakthroughs, while supplying psychosocial insights:

Experimental breakthroughs, both in aetiology and therapeutics, will come mainly from biology, but the insights and leads can hopefully come from many other fields, especially the psychosocial and philosophical;

The biological and the psychological are not exclusive but complementary approaches;

Both integration and reductionism are valid. Integration is necessary as an attitude, reductionism is necessary as an approach. Both the biological and the psychosocial must co-exist in the individual psychiatrist, as much as the branch itself.

Research excellence: Promoting genuine research alone, and working towards an Indian Nobel Laureate in psychiatry by 2020:

To stop promoting poor quality research and researchers, and to stop encouraging sycophants and ladder climbers. To pick up and hone genuine research talent from among faculty and students;

Developing consistent quality environs in departments and having Heads of Units who recognize, hone and nurture talent. And who never give in to pessimism and cynicism;

Stop being satisfied with the money, power and prestige that comes by wheeling-dealing, groupism and politicking;

Infinite vistas of opportunity wait in the wings to unfold and offer opportunities for unravelling the mysteries of the ‘mind’ to the earnest seeker. Provided he is ready to seek the valuable. Provided he stops holding on to the artificial and the superfluous.

Geometric icons and conceptual analogies: A doublet of dynamic forms that reveal, express, and impel analogies

Psychologists’ spatial representations and conceptual analogies form a semiotic doublet by which patterns of their seminal ideas can be compared across different eras. One powerful reappearing idea is Freud’s concept that two logics alternate as forms of thought. This elemental idea entails the individual’s access to analogical thinking, its forms, and its effect on the person’s selection of logical form. To go a recursive step back, I search out the psychologist’s origin of ideas to explain analogy and the two logics. Probing the doublet illuminates the psychologist’s thought forms, semiotic combinations, and choices of logical patterns. Using it to compare different theorists’ concepts of the two logics and analogy reveals the continuously recursive nature of analogy and shows the durability of major ideas. Comparisons go back and forth in time and contribute to understanding the roots of ideas and to project their place and value in future models.

Brain and self - a neurophilosophical account

We have experience and are conscious of the world. Who though is conscious? This is the subject or self of experience. While in the past the concept of self has been matter of philosophical discussion, psychoanalysis shifted it into the domain of psychology where it surfaced as ego. More recently, brain imaging allows to investigate the neural mechanisms underlying our subjective experience of a self. The article focuses on discussing different concepts of self as based on the philosophical accounts. These are then complemented by neuroscientific data on self and self-reference. Finally both philosophical and neuroscientific accounts are directly compared with each other while at the same time their relevance for psychoanalysis of self and ego are pointed out.

Are microglia minding us? Digging up the unconscious mind-brain relationship from a neuropsychoanalytic approach

The unconscious mind-brain relationship remains unresolved. From the perspective of neuroscience, neuronal networks including synapses have been dominantly believed to play crucial roles in human mental activities, while glial contribution to mental activities has long been ignored. Recently, it has been suggested that microglia, glial cells with immunological/inflammatory functions, play important roles in psychiatric disorders. Newly revealed microglial roles, such as constant direct contact with synapses even in the normal brain, have defied the common traditional belief that microglia do not contribute to neuronal networks. Recent human neuroeconomic investigations with healthy volunteers using minocycline, an antibiotic with inhibitory effects on microglial activation, suggest that microglia may unconsciously modulate human social behaviors as “noise.” We herein propose a novel unconscious mind structural system in the brain centering on microglia from a neuropsychoanalytic approach. At least to some extent, microglial activation in the brain may activate unconscious drives as “psychological immune memory/reaction” in the mind, and result in various emotions, traumatic reactions, psychiatric symptoms including suicidal behaviors, and (psychoanalytic) transference during interpersonal relationships. Microglia have the potential to bridge the huge gap between neuroscience, biological psychiatry, psychology and psychoanalysis as a key player to connect the conscious and the unconscious world.

Glutamate modulates resting state activity in the perigenual anterior cingulate cortex - a combined fMRI-MRS study

The perigenual anterior cingulate cortex (PACC) shows high resting state activity and is considered part of the default-mode network (DMN). However, the biochemical underpinnings of the PACC's high resting state activity remain unclear. While animal-based evidence points toward a role for the glutamatergic system, the modulation of the resting state activity level by itself as distinguished from stimulus-induced activity remains to be shown in humans. Using combined fMRI-MRS in healthy subjects, we here demonstrate that the PACC resting state concentration of glutamate is directly related to the level of resting state activity in the same region. In contrast, no such relationship could be detected during the anticipation of reward and punishment, nor in an independent control region (the left anterior insula). Taken together, our findings demonstrate for the first time the modulation of the PACC resting state activity level by the concentration of glutamate in the same regions. This contributes to a better understanding of the biochemical basis for the brain's resting state activity as well as providing some clues regarding its apparent pathological upregulation in psychiatric disorders like the major depressive disorder.