You probably don't realize it when you're listening to your favorite song, but music has an incredibly powerful effect on the human brain.
Singing, playing an instrument, or listening to music have all been shown to activate numerous areas of the brain that control speech, movement, and cognition, memory and emotion – often all at the same time.
Remarkably, research also suggests that music can physically increase brain matter, which could help the brain repair itself.
More intriguing is the impact that music can have even in cases where the brain may not be functioning as it should.
There's also evidence of patients who have suffered brain damage and lost the ability to speak that can still sing when music is played.
Given the powerful effect that music has on the brain, researchers are investigating whether it can be used to treat many different neurological conditions – such as stroke, Parkinson's disease, or brain injury.
One such treatment currently being investigated for use is neurologic music therapy.
Neurologic music therapy works a bit like physiotherapy or speech therapy, in that it aims to help patients manage symptoms and function better in their daily life.
Therapy sessions use musical or rhythmical exercises to help patients regain functional skills. For example, patients relearning to walk after an accident or trauma might walk to the rhythm of music during a therapy session.
Researchers have also investigated whether neurologic music therapy can treat other movement disorders, such as Parkinson's disease.
Most studies in this area have used a technique called rhythmic entrainment exercises, which uses the brain's ability to synchronize with a beat unconsciously – such as having to walk to a specific speed of music or beat.
Compared to doing therapy without music, neurologic music therapy has been shown to improve walking and reduce moments of "freezing" (a temporary, involuntary inability to move) in Parkinson's patients.
For these types of conditions, neurologic music therapy focuses on activating and stimulating areas of the brain which may have been damaged – such as the prefrontal cortex, an area of the brain responsible for planning, decision-making, problem-solving, and self-control.
This might involve the patient switching between playing two types of musical instruments when they hear a change in the music they're playing along to (such as the tempo becoming faster or slower).
One research study found that these types of activities improved concentration and attention for patients with traumatic brain injury. This in turn had a positive impact on their wellbeing and lowered feelings of depression or anxiety.
It's thought that the reason neurological music therapy works is because music can activate and simulate so many different parts of the brain simultaneously.
For patients with neurological conditions, it's often the connections in the brain that are causing problems, rather than a specific area itself.
Research shows that music can uniquely form new connections in the brain. Listening to music also improves neuron repair better than other activities – such as listening to an audiobook – which may mean the brain functions better and builds new connections.
Music is believed to have long-lasting effects on the brain, too. So much so that a musician's brain is actually better connected than people who haven't played music.
This could be important for people with neurological conditions, as music could help to repair damaged connections over time.
This activation of multiple areas of the brain may be the reason why neurologic music therapy is more successful than other standard therapies alone.
Given that many neurological conditions affect the connections in the brain, music's ability to activate multiple areas simultaneously may help bypass these problem connections and build new ones – allowing people to overcome certain symptoms, or better manage them.
Though more research still needs to be done before neurological music therapy is used widely across healthcare systems, early results from studies show how much promise this therapy could hold. Research is also underway to see whether it can be used to help people with age-related diseases, such as dementia or Alzheimer's.