To better understand how microexpressions (which I claim the name doesn’t explain its causes well, as are many terms in the “subconscious” terminology) affect singing:
To sing an emotion, basically the vocal structure needs to be formed in a certain way…. whether it is sadness, anger, happiness. This means that there are large muscle movements that cause a sad face, an angry face, an enthusiastic body, etc.
Microexpressions are frequently subconscious reflexes, and my claim is that these are imbued within the tonicity of muscles and the myofascia tissues. This is less of a nerves issue, but is instead a failure in the nervous system complete circuit.
What happens with the microexpressions is that they prevent the larger muscles from fully extending itself. Hence, if one has suppressed sadness, the imbued sad tissue-tension counter the happiness gestures. So, if one tries to sing happy, and is feeling sad unconsciously; yes it will work, but not nearly as well as if the microexpression sadness wasn’t there.
Singing and posture--see Categories, About, Launch 4-2014 
Leave a Reply