Music can be expressed as a creative form that combines unique sounds, whether vocals or instrumental, to stimulate emotions in individuals. Music has become therapeutic to many, allowing for relaxation and recovery. It combines high and low frequencies that produce emotional impacts. These frequencies are critical as they influence brain activation.
In the research article titled "Effects of Noise Electrical Stimulation on Proprioception, Force Control, and Corticomuscular Functional Connectivity," Dr. Vincent Chen and colleagues investigated how noise electrical stimulation affects proprioceptive senses and grip force control, linking these effects to neural activities in the central nervous system. Their approach included two sessions with fourteen healthy adults, where participants performed joint proprioceptive and grip force tasks with and without noise stimulation. Surface electrodes measured brain activity using EEG during grip force steady hold tasks before and after thirty minutes of stimulation. Results showed that grip strength and joint position senses improved stimulation. The research highlighted the benefits of sensory-level noise electrical stimulation. It showed improved peripheral sensory sensitivity, which correlated with increased gamma coherence.
In the article "Effects of different music frequencies on cortical responses and functional connectivity in patients with minimally conscious states," researchers explored how different music frequencies affect brain activity in individuals with MCS. The study involved twenty-six MCS patients and twenty healthy controls listening to music across low, medium, and high-frequency ranges. Researchers used fNIRS (functional near-infrared spectroscopy) to assess MCS patients' brain activation and functional connectivity. They discovered that the low- and high- frequency ranges activated the left prefrontal and primary sensory cortex and improved connectivity. Music frequency is becoming more recognized for its potential to activate brain regions associated with cognitive processing.
Both studies showed the importance of sensory inputs. The first study examined the effects of sensory-level noise electrical stimulation. The study found that this method improved proprioception and grip force control. The improvement was linked to increased neural activity in the central nervous system. The second study examined how music frequencies activated brain regions critical for cognitive processing in MCS patients. This study stressed the potential of electrical and auditory sensory input. Both studies did also raise questions about potential limitations. What are the possible limitations of using noise electrical stimulation as a treatment to enhance proprioception and motor controls in humans? Could other auditory stimuli, such as rhythms/lullabies or melodies, benefit cognitive recovery?
I mentioned the study of different music frequencies because I recently watched a video that showed the effects of high frequency. After listening to it, I felt like I had hit a reset button for my mind. This brief experience interested me in how different frequencies impact our focus and mind. I find myself listening to both high- and low-frequency music while studying.
References:
Chou LW;Hou SL;Lee HM;Fregni F;Yen A;Chen V;Wei SH;Kao CL; “Effects of Noise Electrical Stimulation on Proprioception, Force Control, and Corticomuscular Functional Connectivity.” IEEE Transactions on Neural Systems and Rehabilitation Engineering : A Publication of the IEEE Engineering in Medicine and Biology Society, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/37235470/. Accessed 11 Oct. 2024.
Yin J;Xu G;Xie H;Liu Y;Dou Z;Shao B;Li Z; “Effects of Different Frequencies Music on Cortical Responses and Functional Connectivity in Patients with Minimal Conscious State.” Journal of Biophotonics, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/38303080/. Accessed 11 Oct. 2024.
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