Everything about Shivering totally explained
Shivering is a bodily function in response to early
hypothermia in
warm-blooded animals. When the core
body temperature drops, the shivering
reflex is triggered.
Muscle groups around the
vital organs begin to shake in small movements in an attempt to create warmth by expending
energy. Shivering can also be a response to a
fever as a person may feel cold, though their core temperature is already elevated.
Located in the dorsomedial portion of the
hypothalamus near the wall of the
third ventricle is an area called the primary motor center for shivering. This area is normally inhibited by signals from the heat center in the anterior hypothalamic-preoptic area but is excited by cold signals from the
skin and
spinal cord. Therefore, this center becomes activated when the body temperature falls even a fraction of a degree below a critical temperature level.
Increased muscular activity results in wasted heat- here the heat is utilized for warmth.
Shivering can also appear after surgery. This is known as
post-surgical shivering.
Further Information
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