The physiological tremor experienced during periods of low blood glucose, often referred to as hypoglycemia, stems from the body’s complex hormonal and neurological responses. When the body’s glucose levels decrease below a certain threshold, a cascade of events is initiated to restore balance. This response includes the release of hormones like epinephrine (adrenaline) and norepinephrine from the adrenal glands. These hormones aim to increase glucose production and release stored glucose into the bloodstream.
The release of epinephrine and norepinephrine has multiple effects. These hormones increase heart rate, blood pressure, and redirect blood flow. Furthermore, they stimulate the breakdown of glycogen (stored glucose) in the liver and muscles, releasing glucose into circulation. The increased sympathetic nervous system activity, driven by these hormones, directly affects muscle function, causing involuntary contractions and subsequent shaking or trembling. This physiological response represents the body’s attempt to maintain energy levels and ensure essential functions continue despite the reduced glucose availability.
