Breathing & Autonomics

Respiration, the Diaphragm, and the Nervous System

​ The autonomic nervous system is a key regulator of physiological functions including the control of respiration, cardiac regulation, vasomotor activity, and reflexivity. This system acts unconsciously and is the primary control mechanism for the ‘fight, flight, or freeze’ and ‘rest and digest’’ responses. The diaphragm is the autonomic nervous system’s connection to the rest of the body. In this way the diaphragm and respiration influence myriad bodily functions. The diaphragm also attaches directly to the lumbar spine and contracts before extremity limb movement, making it a major core stabilizer. During inhalation the diaphragm contracts and descends into the abdomen while out interval organs are pushed forward and downward against the abdominal musculature. When this happens intra-abdominal pressure and systemic tension increase, perpetuating a sympathetic nervous system response via excitation. This causes heart rate to increase …