Cancer is a complex experience that, in addition to the biological processes of the disease, can also affect the psychological and physiological systems associated with stress. Diagnosing the disease, worrying about the prognosis, waiting for test results, aggressive treatments, pain, fatigue, sleep disturbances, and body image changes can increase psychological and physiological arousal. In this situation, the autonomic nervous system as one One of the main pathways is the relationship between mental state and bodily responses. Continuous activation of the sympathetic branch and decreased flexibility of parasympathetic regulation can be associated with changes in heart rate, breathing, blood pressure, muscle tension, and other physiological indicators. From this perspective, art therapy as a complementary intervention in psycho-oncology can be studied in modulating some components of stress response with the aim of reducing distress, regulating emotion, changing the direction of attention, and creating a relaxation experience.
The stress response is a multi-systemic process and cannot be attributed to a mere biological indicator ora part of the nervous system. In the face of a threat, the autonomic nervous system and the pituitary-adrenal axis are activated in concert with each other. Increased sympathetic activity can affect the body. Prepare for a quick response and the hormonal axis of stress also plays a role in regulating the response to stress by altering cortisol secretion. In chronic stress situations, persistence or disorder of these responses may be associated with sleep disturbances, fatigue, mood changes, and increased sensitivity to physical symptoms. In patients with cancer, disease-related factors and treatment can further complicate this condition, so any intervention aimed at managing stress should be interpreted alongside the patient's medical condition, medications, pain, sleep, and general conditions.
By simultaneously engaging sensory, motor, cognitive, and emotional processes, art therapy can create a context for reducing the constant focus on the threat. When a person participates in the process of painting, drawing, music, collage, or other creative activities, some of his attention resources shift from continuous monitoring of illness to a purposeful, structured activity. This shift in attention may result from the intensity of rumination and rumination. It reduces emotional arousal and provides a more relaxed experience. The importance of this process in cancer is that the patient is often in a cycle of waiting, worrying, and monitoring physical symptoms, and artistic activity can create a different experience of attention and presence for a while.
One of the most important indicators in the study of the relationship between art therapy and the autonomic nervous system is the variability of heart rate or HRV. HRV represents the normal changes in the time interval between heart beats and is used as one of the indirect indicators of the body's auto-regulating flexibility. Increased autoflexibility is associated in some situations with a better capacity to adapt to stress, but the interpretation of HRV should be done with caution, as factors such as age, medications, physical activity, etc. Sleep, comorbidities, and heart conditions can affect it. Therefore, if art therapy research observes changes in HRV, it cannot be attributed solely to the direct effect of art intervention without considering other factors.
Respiratory activity is also one of the possible pathways of interaction between art and auto-regulation. Certain artistic activities, especially music and rhythmic activities, may help regulate the pace and pattern of breathing. When artistic activity is combined with slow breathing and focused attention, different physiological conditions may arise than intense arousal. However, a distinction must be made between art therapy and specific breathing regulation techniques, as every breathing change in an art session is not necessarily caused by the therapeutic mechanism of art.
On the other hand, cortisol has been considered as one of the important indicators of the activity of the hypothalamic-pituitary-adrenal axis in stress studies. Saliva or blood cortisol measurements can provide information about the status of the stress axis, but its interpretation requires controlling for sampling time, sleep, medications, nutrition, physical activity, and other intervening factors. Therefore, if future art therapy studies report a decrease in cortisol, such a findingIt can be suggested as a possible biomarker of a change in stress response, but controlled and replicated studies are needed to draw conclusions about the definitive effect of stress-based art therapy.
Along with HRV and cortisol, indicators such as blood pressure, heart rate, skin electrical conduct, and breathing patterns can also be used to assess the physiological response to artistic interventions. The skin's electrical conductivity can show changes in spontaneous arousal, and heart rate and blood pressure also provide information about a person's physiological state. However, none of these indicators alone indicate "stress reduction," and a valid interpretation requires combining physiological data with psychological measures such as anxiety, distress, sleep quality, perceived pain , and quality of life.
From a psychological point of view, one of the most important possible mechanisms of art therapy is to increase a sense of control and self-efficacy. Cancer can reduce a person's sense of control over the body and the future. Unlike many therapeutic situations, art activity provides the patient with the possibility of choice, change, and mood . The person can choose the color, form, music, subject, and speed of the activity to some extent according to their preferences. This experience of agency can help reduce feelings of helplessness and increase active participation in the adjustment process. Such changes may also indirectly affect physiological responses to stress, although specific research is needed to prove this causal chain.
Music therapy has a special place in this area, as rhythm and musical structure can affect attention and arousal. Music chosen according to the patient's preferences may create a sense of calm, security, or emotional connection, and in some situations, help reduce anxiety. Visual arts can also allow the patient to experience and represent emotions that are difficult to describe in the form of images or forms, by allowing for non-verbal expression . This process may help reduce the stress caused by unexpressed emotions and increase the coherence of the psychological experience.
Research evidence on art interventions in patients with cancer has focused mostly on outcomes such as anxiety, depression, psychological distress, pain and quality of life, and some studies have also looked at physiological changes. However, direct evidence on how and to what extent art therapy alters the autonomic nervous system or biomarkers of stress is still limited and heterogeneous. Differences in the type of intervention, number of sessions, characteristics of patients, type of cancer, stage of disease, medications used, and method of measuring biomarkers make the results of studies not easily generalizable. Therefore, it is better to use the term "capacity to modulate the stress response" and avoid making definitive claims about the bioregulation of stress.
In clinical application, art therapy can be used alongside medical treatment for patients who are experiencing anxiety, distress, fear of treatment, sleep problems, pain , or difficulty expressing emotions. Sessions can be designed individually or in groups, and the type of activity is chosen based on the patient's physical condition, energy level, motor ability, and preferences. In patients who are severely tired or Simpler activities such as freestyle drawing, coloring, listening to music , or creative writing can replace more physical activities. This flexibility is an important feature of artistic intervention in oncological settings.
Despite the existing capacities, art therapy should not be presented as a method of direct cancer treatment or an alternative to oncological treatments. Reducing anxiety or changing a physiological indicator does not mean a direct effect on tumor growth, and there should be no simple causal relationship between stress reduction and cancer control . Also, any new, severe, or unusual physical symptoms should be medically examined and should not be attributed solely to stress. This principle is essential to prevent incorrect de-medicalization of symptoms and to maintain patient safety.
Another important challenge is the difficulty of separating the effect of art therapy from the effect of accompanying factors. The presence of the therapist, receiving social support, rest during the session, personal attention, positive expectation of the patient, and even a change in the therapeutic environment can affect the stress response. Therefore, future studies should use appropriate control groups, sufficient samples, and longitudinal designs, and measure a set of physiological markers simultaneously along with psychological indicators. The combination of HRV, heart rate, blood pressure, skin conduction, cortisol, and valid measures of anxiety and distress can provide a more accurate picture of possible changes.
The role of art therapy in the management of physiological stress of cancer can be defined in creating conditions for better regulation of the psychosomatic experience of the disease. By providing the opportunity to express emotion, organize attention, increase a sense of agency, and create a meaningful experience, art can be one of the complementary pathways to reduce the psychological burden of the disease, and in this way, it is likely to affect some components of the physiological response to stress as well. However, to transform this Hypothesis, to a scientifically proven model, there is a need for research that investigates the relationship between the artistic process, psychological changes, autonomic nervous system activity, and biomarkers of stress simultaneously and over time. Such an approach can move art therapy from a mere supportive experience to a more precise, evaluative, and personalized intervention in comprehensive cancer care.