Introduction

In today's fast-paced world, mental wellness has become a critical aspect of our overall health. Increased stress, anxiety, and depression are increasingly prevalent. Traditional approaches to managing mental health and wellbeing, such as therapy, medication and physical activity, can be complemented by innovative techniques like biofeedback and neurofeedback. These methods use real-time physiological data to help individuals gain control over their body's responses, promoting relaxation, improving focus, and reducing symptoms of mental health conditions. This article explores how biofeedback and neurofeedback can support mental wellness and the scientific evidence backing their efficacy.

Understanding biofeedback

Biofeedback is a mind-body therapy that lets you become mindful and control previously involuntary processes such as heart rate, muscle tension, skin temperature, and blood pressure. Biofeedback helps individuals learn how to influence and regulate their body's responses, which can promote better health and well-being by providing real-time feedback on these processes. Some technology used, for example, is:

• Electromyography (EMG)  – Measures muscle activity.
• Electrocardiogram (ECG) – This monitors heart function.
• Galvanic skin response sensors – Detect changes in sweat gland activity.

Different types of biofeedback

Respiratory feedback

Sensors placed on the abdomen, chest or nose measure various aspects of breathing such as rate, depth, and patterns of inhalation and exhalation. Feedback from these processes can appear as a graph or sound, for example, and the individual observing the feedback can adapt their breathing accordingly. This technique is specifically useful for those with anxiety and panic disorders.

Galvanic skin response

This provides feedback on skin moisture that is influenced by sweat gland activity using electrodes placed on fingers and palms to measure skin conductance. Sweat gland activity is influenced by stressors and arousal levels, so feedback on these systems can help with regulation.

Blood pressure feedback

Blood pressure is the force exerted by pumping blood on the walls of blood vessels and is typically measured in two numbers: systolic pressure (the pressure when the heart beats) over diastolic pressure (the pressure when the heart rests between beats). Typically, cuffs are placed around the upper arm, but continuous blood pressure measurements can be taken using a finger cuff or wrist device. Individuals can see how their blood pressure responds to various activities, thoughts, and relaxation techniques, allowing them to make immediate adjustments.

Heart rate variability (HRV) feedback 

HRV is the variation in time intervals between consecutive heartbeats. It allows us to measure the autonomic nervous system's ability to adapt to stress and maintain homeostasis. A high HRV indicates a healthy, responsive system, while a low HRV can indicate stress and poor health. It is typically measured using an ECG or a heart rate monitor. Monitoring HRV in real time can show individuals how different activities, thoughts, and breathing patterns affect it.

Thermal biofeedback

Thermal biofeedback looks at a person’s temperature to determine their physical state. Attaching a thermometer or thermostat to fingers and toes gives real-time feedback and allows the individual to notice differences in temperature at the extremities based on their levels of stress, for example.

Understanding neurofeedback

Neurofeedback is a non-invasive type of brain training which aims to help users self-regulate specific neural patterns and activity using real-time feedback. It acts on the reward system of the brain to produce more optimal brain functioning, utilizing operant conditioning by rewarding the desired brain activity. Neurofeedback uses electroencephalography (EEG). Sensors are placed on the scalp that pick up communication between the cells of the brain (neurons), this is interpreted as frequency measured in Hz. Occasionally, hemoencephalography (HEG) is used to look at blood flow to the brain using infrared sensors.

The brain waves being monitored by EEG are:

• Delta (0.5-4hz) – Deep sleep
• Theta (4-8hz) – Relaxed, meditative state
• Alpha (8-12hz) – Calm, alert state
• Beta (12-30hz) – Active thinking, focus
• Gamma (30-100hz)  – High-level cognitive function

Neurofeedback can be used to manage a range of conditions, such as:

• Anxiety and depression
• Obsessive-compulsive disorder OCD
• Autism
• Emotional dysregulation
• Attention-deficit/hyperactivity disorder ADD/ADHD
• Insomnia and other sleep conditions
• Cognitive function- enhanced focus and performance
• Migraines

Applications of biofeedback and neurofeedback in mental wellness

Stress management

Stress is a natural reaction to perceived harm by our body. In manageable doses, stress can be useful, for example, for motivation and focus. In other scenarios, our body may respond in the typical ‘flight’ or ‘fight’ manner. When stress accumulates, an emotional response can develop into physical responses such as an increased heart rate and body temperature, rapid and shallow breathing, sweating and heightened emotions. Biofeedback can be a useful tool for stress management, it can help us understand the physiological changes that take place in our body when we are stressed and help manage the changes by creating awareness between the body and mind. Some biofeedback techniques include:

• Heart rate variability feedback
• Respiratory feedback
• Muscle tension
• Galvanic skin response

A study looking at biofeedback for the management of stress in physicians asked individuals to use biofeedback for stress management three times daily over the course of 28 days. Researchers found a significant reduction in stress in those who underwent the intervention compared to those who did not undergo biofeedback.¹

Anxiety reduction

Anxiety is a natural feeling experienced by everyone at some point in their life, for example, before sitting an exam or an upcoming job interview. However, these feelings of anxiety can affect day-to-day functioning, especially when they develop into an anxiety disorder such as Generalized Anxiety Disorder (GAD). This can feel like overwhelming fear and worry that can’t be controlled. Some common feedback techniques used in the management of anxiety include:

• Muscle tension
• Respiratory biofeedback
• Thermal biofeedback
• Neurofeedback

One study looking at the benefits of heart rate variability feedback on anxiety followed 14 individuals for 8 weeks and fitted them with a device that recorded and measured HRV in real time. By the end of this trial, on average, the scores for GAD symptoms reduced significantly, with only 2 of the 14 participants still meeting the clinical threshold for high anxiety levels.² Studies looking at different brain region targets for neurofeedback have also shown promising effects for the reduction of anxiety symptoms.

Improving focus and concentration

Many individuals struggle to stay focused in this increasingly fast-paced world. Biofeedback and neurofeedback therapy offer a solutions to improve focus and concentration. The mental state of our brain is associated with specific frequencies. For Example, Beta waves (12-30hz) are dominant when we are alert, conversely, theta waves are most prevalent in more relaxed states and during daydreaming. Finding a balance between these states is a core part of neurofeedback associated with mental focus and attention. Studies have shown that neurofeedback is effective in improving cognitive processing and executive function in older individuals.

Conclusion

In conclusion, Biofeedback and neurofeedback present valuable techniques to support mental wellness by providing individuals with the tools to gain control over their physiological and neural responses. These methods complement traditional mental wellness approaches, offering an effective way to manage stress, reduce anxiety, and improve focus and concentration. By utilizing real-time feedback from bodily and brain functions, biofeedback and neurofeedback encourage individuals to make improvements in their mental health by bringing previously unconscious changes into awareness.

FAQs

Are there side effects associated with biofeedback?

Biofeedback is generally considered safe, however, you should consult a medical professional before starting this therapy. 

Are there side effects associated with neurofeedback?

When neurofeedback is performed by a well-trained professional, the side effects are minimal but can include:

• Dizziness
• Headaches
• Fatigue
• Anxiety and depression
• Brain fog