A new study from Umeå University, Sweden, shows that the body's muscles sense mechanical pressure.
Umea UniversitySep 10 2024 A new study from Umeå University, Sweden, shows that the body's muscles sense mechanical pressure. This new discovery has important implications for movement neuroscience and may improve the design of training and rehabilitation to relieve stiff muscles.
In the study, the researchers applied different levels of pressure on forearm muscles of awake volunteers, while recording signals from nerve fibers of muscle spindles located in the pressed muscle. When the participants' hands were still, the muscle spindles reacted strongly to muscle pressure, suggesting that pressure alone is a sufficient stimulus for these receptors.
The researchers also found that when they suddenly removed pressure from muscles, the activity of spindles dropped rapidly below normal levels. Because spindle signals reflexively increase muscle contraction and stiffness, weaker spindle signals are typically associated with less muscle stiffness. This finding led the researchers to propose the "triple-eight" technique for quickly relieving muscle stiffness.
Nervous System Neuroscience Research
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