Pannicular reflex

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The panniculus reflex ( panniculus , lat .: subcutaneous tissue ) is a reflex and belongs to the so-called extraneous reflexes of the spinal cord , according to another classification to the skin or surface reflexes . It is triggered by touching the skin with a pointed object or pinching the back area, which is answered with a twitch of the trunk skin muscle ( musculus cutaneus trunci ). Physiologically, the reflex serves the animal to ward off insects.

Diagnostic statement

The excitation triggered at the tactile receptors is conducted to the spinal cord via the dorsal roots of the spinal nerves. The information is conveyed to the reflex center in the last neck (C8) and first chest segment (Th1) of the spinal cord via ascending pathways in the spinal cord. The motor root cells of the lateral thoracic nerve , which innervates the trunk skin muscle , are also located here .

The reflex is examined segmentally on both sides, starting in the cross area up to the level of the shoulder blades. If there is a lesion of the spinal cord, the reflex behind this damage fails. The functioning of this reflex depends on the integrity of the sensory and motor nerves as well as the ascending spinal cord tract. In most cases, damage to the spinal cord tract is the cause of a reflex failure.

literature

  • Franz-Viktor Salomon: nervous system, systema nervosum . In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine . Enke, Stuttgart 2004, ISBN 3-8304-1007-7 , pp. 464-577.