The analgesic effect of music on cold pressor pain responses: The influence of anxiety and attitude toward pain

Accelerated construction of stress relief music datasets using CNN and the Mel-scaled spectrogram

Listening to music is a crucial tool for relieving stress and promoting relaxation. However, the limited options available for stress-relief music do not cater to individual preferences, compromising its effectiveness. Traditional methods of curating stress-relief music rely heavily on measuring biological responses, which is time-consuming, expensive, and requires specialized measurement devices. In this paper, a deep learning approach to solve this problem is introduced that explicitly uses convolutional neural networks and provides a more efficient and economical method for generating large datasets of stress-relief music. These datasets are composed of Mel-scaled spectrograms that include essential sound elements (such as frequency, amplitude, and waveform) that can be directly extracted from the music. The trained model demonstrated a test accuracy of 98.7%, and a clinical study indicated that the model-selected music was as effective as researcher-verified music in terms of stress-relieving capacity. This paper underlines the transformative potential of deep learning in addressing the challenge of limited music options for stress relief. More importantly, the proposed method has profound implications for music therapy because it enables a more personalized approach to stress-relief music selection, offering the potential for enhanced emotional well-being.

The effect of recorded music on pain endurance (CRESCENDo) - A randomized controlled trial

INTRODUCTION

Clarifying the effect of music on pain endurance in an experimental design could aid in how music should be applied during both surgical and non-surgical interventions. This study aims to investigate the effect of music on pain endurance and the involvement of the sympathetic adrenomedullary axis (SAM) and the hypothalamic-pituitary-adrenocortical axis (HPA).

MATERIALS AND METHODS

In this randomized controlled trial all participants received increasing electric stimuli through their non-dominant index finger. Participants were randomly assigned to the music group (M) receiving a 20-minute music intervention or control group (C) receiving a 20-minute resting period. The primary outcome was pain endurance, defined as amount milliampere tolerated. Secondary outcomes included anxiety level, SAM-axis based on heart rate variability (HRV) and salivary alpha-amylase, and HPA-axis activity based on salivary cortisol.

RESULTS

In the intention-to-treat analysis, the effect of music on pain tolerance did not statistically differ between the M and C group. A significant positive effect of music on pain endurance was noted after excluding participants with a high skin impedance (p = 0.013, CI 0.35; 2.85). Increased HRV was observed in the M-group compared to the C-group for SDNN (B/95%CI:13.80/2.22;25.39, p = 0.022), RMSSD (B/95%CI:15.97/1.64;30.31, p = 0.032), VLF (B/95%CI:212.08/60.49;363.67, p = 0.008) and HF (B/95%CI:821.15/150.78;1491.52, p = 0.0190). No statistical significance was observed in other secondary outcomes.

CONCLUSIONS

The effect of the music intervention on pain endurance was not statistically significant in the intention-to-treat analysis. The subgroup analyses revealed an increase in pain endurance in the music group after correcting for skin impedance, which could be attributed to increased parasympathetic activation.

A study based on functional near-infrared spectroscopy: Cortical responses to music interventions in patients with myofascial pain syndrome

Object

This study measured cerebral blood oxygen changes in patients with myofascial pain syndrome (MPS) using functional near-infrared spectroscopy (fNIRS). The aim was to investigate the effect of music intervention on pain relief in MPS patients.

Materials and methods

A total of 15 patients with MPS participated in this study. A self-controlled block task design was used to collect the oxy-hemoglobin ([HbO₂]) and deoxy-hemoglobin ([HbR]) concentrations in the prefrontal cortex (PFC) and motor cortex using fNIRS. The cerebral cortex response and channel connectivity were further analyzed. In the experiment, the therapist was asked to apply compression of 3-4 kg/cm² vertically using the thumb to induce pain. Soothing synthetic music with frequencies of 8-150 Hz and 50-70 dB was used as the audio for the music intervention.

Result

Compared to the group without music intervention, the activation of brain regions showed a decreasing trend in the group with music intervention under the onset of pain. The results of paired t-tests showed that nine of the data were significantly different (p < 0.05). It was also found that with music intervention, inter-channel connectivity was diminished. Besides, their dorsolateral prefrontal cortex (dlPFC) was significantly correlated with the anterior prefrontal cortex (aPFC) for pain response (r = 0.82), and weakly correlated with the premotor cortex (r = 0.40).

Conclusion

This study combines objective assessment indicators and subjective scale assessments to demonstrate that appropriate music interventions can be effective in helping to relieve pain to some extent. The analgesic mechanisms between relevant brain regions under music intervention were explored in depth. New insights into effective analgesic methods and quantitative assessment of pain conditions are presented.

Feeling the music: The feel and sound of songs attenuate pain

BACKGROUND

Extensive research has demonstrated that music and touch can separately attenuate perceived pain intensity. However, little research has investigated how auditory and tactile stimulation can synergistically enhance pain attenuation by music. In the current study, we investigated whether tactile stimulation can enhance music-induced analgesia for noxious force stimulation on the fingertip.

METHODS

We systematically applied force to 34 listeners' fingertips to induce pain. We then compared the force measurement (in Newton) that gave rise to the same perceived moderate pain intensity when listeners were presented their self-selected liked or disliked song with auditory-only, tactile-only and auditory-tactile stimulation. Higher force indicated less perceived pain. The tactile stimulation were low-frequency modulations extracted from the songs and presented as vibrations on the wrist.

RESULTS

The results showed a significant interaction between song preference and stimulation condition. Listeners had higher force measurements at the same moderate pain for their liked compared to disliked song only in the auditory-tactile condition. They also had higher force measurements for their liked song with auditory-tactile stimulation compared to the other remaining conditions except for the liked song with auditory-only stimulation.

CONCLUSIONS

The addition of tactile stimulation enhanced music-induced analgesia which reduced subjective pain intensity. The findings suggest that combined auditory and tactile stimulation may increase the affective content of self-selected preferred music, which may stimulate affective and motivation mechanisms which inhibit pain transmission.

Tune out pain: Agency and active engagement predict decreases in pain intensity after music listening

Music is increasingly being recognised as an adjuvant treatment for pain management. Music can help to decrease the experience of both chronic and experimental pain. Cognitive agency has been identified as a specific mechanism that may mediate the analgesic benefits of music engagement however, it is unclear if this specific mechanism translates to acute pain. Previous attempts to understand the cognitive mechanisms that underpin music analgesia have been predominantly lab-based, limiting the extent to which observed effects may apply to participants’ everyday lives. Addressing these gaps, in naturalistic settings, the present study examined the degree to which cognitive agency (i.e., perceived choice in music), music features (i.e., complexity), and individual levels of musical sophistication were related to perceived pain. In an online global experiment, using a randomised between groups experimental design with two levels for choice (no choice and perceived choice) and two levels for music (high and low complexity), a sample of 286 adults experiencing acute pain reported their pain intensity and pain unpleasantness pre- and post-music listening. A bespoke piece of music was co-created with a commercial artist to enable the manipulation of music complexity while controlling for familiarity, while facilitating an authentic music listening experience. Overall, findings demonstrated that increased perceived control over music is associated with analgesic benefits, and that perceived choice is more important than music complexity. Highlighting the importance of listener engagement, people who reported higher levels of active engagement experienced greater decreases of pain intensity in the perceived choice condition, than those who reported lower levels of active engagement. These findings have implications for both research and practice, emphasising the importance of facilitating freedom of choice, and sustained engagement with music throughout music listening interventions.

Evaluation of the Efficacy of Musical Vibroacupuncture in Pain Relief: A Randomized Controlled Pilot Study

OBJECTIVES

To investigate if skin vibration employing consonant frequencies emitted by skin transducers attached to a combination of acupuncture points and according to musical harmony (musical chord) produces more significant pain relief compared to just a single frequency.

MATERIALS AND METHODS

Skin vibrostimulation produced by five electromagnet transducers was applied at five acupoints traditionally used to pain relief and anxiety in 13 pain-free healthy volunteers using the cold pressor test (CPT). The study consisted of three randomized sessions conducted on alternate days, with participants receiving either simultaneous frequencies of 32, 48, and 64 Hz that equate those used in a musical chord, hereby defined as musical vibroacupuncture (MVA), a single frequency of 32 Hz, set as vibroacupuncture (VA) and sham procedure (SP). CPT scores for pain thresholds and pain tolerance were assessed using repeated-measures ANOVAs. Pain intensity was evaluated using a numerical rating scale (NRS), while sensory and affective aspects of pain were rated using the short-form McGill Pain Questionnaire (SF-MPQ) and State-Trait Anxiety Inventory (STAI) Y-Form.

RESULTS

Pain thresholds did not vary significantly between trials. Pain tolerance scores were markedly higher in MVA compared to baseline (p = 0.0043) or SP (p = 0.006) but not for VA. Pain intensity for MVA also differed significantly from the baseline (p = 0.007) or SP (p = 0.027), but not for VA. No significant differences were found in SF-MPQ and STAI questionnaires.

CONCLUSIONS

These results suggest that MVA effectively increased pain tolerance and reduced pain intensity when compared with all groups, although not significant to the VA group.

The effect of music on pain sensitivity in healthy adults

BACKGROUND

Previous work suggests mediating effects of music on acute pain processing. This quasi-experimental pilot study examined the effects of music on experimental pain sensitivity.

METHODS

Healthy adults (N = 40) completed quantitative sensory tests during three music conditions (silence, listening, and singing). Repeated Measures ANOVA , Friedman's Test, and post hoc comparisons determined differences in pain intensity and time to cold pain threshold and tolerance between conditions.. Pearson partial correlations evaluated the association of musical factorswith pain sensitivity.

RESULTS

Participants demonstrated longer time intervals until perceiving pain and tolerated pain for longer durations when singing compared to listening. Greater self-reported singing proficiency was associated with higher tolerance. Several musical factors were significantly correlated with time from pain threshold to reaching tolerance.

CONCLUSION

Singing during an acute painful stimulus may increase tolerance. Various musical characteristics impact volunteers' central pain responses and singing may be an important adjunct pain management strategy.

Practical Guidance for Optimizing Patient Comfort During Microfocused Ultrasound with Visualization and Improving Patient Satisfaction

BACKGROUND

Microfocused ultrasound with visualization (MFU-V; Ultherapy®) is an effective method for correction of skin laxity through lifting and tightening skin on the face, neck, and décolleté as well as on other parts of the body such as the knees, arms, and abdomen. In addition to being a noninvasive modality for tissue tightening, MFU-V has a biological effect on tissue, rejuvenating the skin through stimulation of elastogenesis and neocollagenesis. MFU-V is also commonly combined with other interventions such as fillers, neuromodulators, and absorbable suspension sutures.

OBJECTIVES

The aim of this study was to share the extensive experience of the authors in optimizing comfort for their MFU-V patients in order to provide guidance to the broader community surrounding optimal patient comfort with this procedure.

METHODS

The authors discuss their approaches to patient comfort and satisfaction. Elements of each approach include patient selection, pharmacologic and nonpharmacologic comfort measures, and how prioritization of patient comfort affects both their individual patients and practices.

RESULTS

The authors share their approaches for optimizing patient comfort during the procedure and provide an overview of both pharmacologic and nonpharmacologic measures that can be adopted to support patient comfort and satisfaction. The similarities and differences of each approach are discussed.

CONCLUSIONS

In addition to diligent patient selection, the authors find that attention to patient comfort is directly related to satisfaction and appears to be a primary factor in patients' decisions to return for additional treatments.