Cross-threshold gait

Introduction The common peroneal nerve is composed of L4-S3, and its damage causes dorsiflexion, abduction and adduction, and obstacles to the toe, as well as anterior and lateral sensation of the lower leg. And damage to the affected area. The patient showed that the foot and the toes could not dorsiflexion, the foot was drooping, the walking was high, and the toes landed first, showing a cross-threshold gait. Lead poisoning, metabolic disorders (diabetes), connective tissue diseases (nodular polyarteritis), and leprosy can cause this disease. Metabolic disorder refers to the process of metabolism, in addition to the production of nutrients, if the body fails to successfully metabolize other parts of the food into waste that can be discharged from excretory organs (such as the digestive system, urinary system and perspiration system, respiratory system, etc.). Things, these wastes will remain in the body organs.

Cause

(1) penetrating injury, humeral head fracture trauma, traction can damage the superficial peroneal nerve and deep sacral nerve. It is caused by damage to nerve tissue and soft tissue.

(2) Compression: The common peroneal nerve bypasses the humeral neck and is most vulnerable. Long-term sputum can cause it. It is an abnormal performance caused by oppression.

(3) Lead poisoning, metabolic disorders (diabetes), connective tissue diseases (nodular polyarteritis) and leprosy.

an examination

Related inspection

Neurological examination of the nervous system cytology

The patient showed that the foot and the toes could not dorsiflexion, the foot was drooping, the walking was high, and the toes landed first, showing a cross-threshold gait. The anterior and lateral shank feels impaired. Electrophysiological examination, through electromyography and evoked potential examination, to determine the extent, extent, recovery and prognosis of nerve injury. It is also important to check the color ultrasound and MRI of the affected area.

Differential diagnosis

1. Early or cauda equine tumors of motor neuron disease may show sagging of one foot and resemble common peroneal nerve paralysis, but all have loss of Achilles tendon reflex or other muscles of lower limbs, indicating that the lesion has exceeded the common peroneal nerve.

2. The common injury of the common peroneal nerve and the sacral nerve has a sensory disturbance at the base of the foot, and the foot and toes cannot be deformed.

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