piloerection reflex

The vertical hair reflex muscles are dominated by sympathetic nerves. The ice cubes are placed behind the patient's neck or in the armpits. After a few seconds, the vertebral muscles contract and the hair follicles bulge like chicken skin. The extent of sympathetic dysfunction is judged based on the location of the vertical hair reflex disorder. The vertical hair reflex is governed by the sympathetic segmental, that is, the neck 8 to the chest 3 branches and the neck, the chest 4 to the chest 7 with the upper limb, the chest 8 to the chest 9 with the trunk, and the chest 10 to the waist 2 with the lower limb. According to the location of the reaction, it can assist in the localization diagnosis of sympathetic dysfunction. Basic Information Specialist classification: neurological examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people are skin ulcers or damaged patients in the neck, chest and other parts. Normal value Normal people have a vertical hair reaction after 4 to 5 seconds (visible vertical muscle contraction, hair follicle bulge like chicken skin), most obvious at 7 to 10 seconds, 15 to 20 seconds disappear. Clinical significance Abnormal results vertical hair reflexes are governed by sympathetic segmental, that is, neck 8 ~ chest 3 with the face and neck, chest 4 ~ chest 7 with the upper limbs, chest 8 ~ chest 9 with the trunk, chest 10 ~ waist 2 with the lower limbs. According to the location of the reaction, it can assist in the localization diagnosis of sympathetic dysfunction. People who need to be examined: patients with sympathetic dysfunction. Precautions Pre-inspection contraindications: Prepare the inspection items to be used, such as the items used for scratching and ice cubes, and prepare the towels. After the ice cubes are stimulated, wipe the water left on the skin with a towel. Requirements for inspection: 1. When the stroke is moderate, the strokes should be soft and prevent puncture. When using a finger, it is best to cut the nails short. 2, the use of ice to stimulate the skin of the neck, chest and other parts of the time should not be too long, ice should not have sharp corners to prevent frostbite and puncture. Inspection process Scratching or stimulating the skin of the patient's neck, chest, etc. with ice. Normal people have a vertical hair reaction after 4 to 5 seconds (visible vertical muscle contraction, hair follicle bulge like chicken skin), 7 to 10 seconds Most obviously, 15 to 20 seconds disappeared. Not suitable for the crowd Skin ulcers or damaged patients in the neck, chest, etc. Adverse reactions and risks Generally no adverse reactions.

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