On this Page: 1  The significance of Mercury Retrograde. 2  Indicators in the charts of people especially sensitive to the Mercury Retrograde cycle. 3  How this Mercury Retrograde cycle affects each sign of the zodiac.
The H-reflex (or Hoffmann's reflex) is a reflectory reaction of muscles after electrical stimulation of sensory fibers (Ia afferents stemming from muscle spindles) in their innervating nerves (for example, those located behind the knee).fter about 5 days in zero gravity, for instance in orbit around Earth, the h-reflex diminishes significantly. It is generally assumed that this is due to a marked reduction in the excitability of the spinal cord in zero gravity.
By sending commands to the motor neurons the brain senses and sets a muscles length. The reaction of teh stretch reflex is trying to keep the muscle at the same length by shortening the muscle. The stretch reflex is important for maintaining muscle tone and adjusting it reflexively. Patellar, (knee jerk). Or Achilles reflex.