Muscle paralysis below the thigh or below the knee

Introduction Muscle spas below the thigh or below the knee are common in sciatic nerve injury. Diagnosis of sciatic nerve injury: history of trauma or history of injection, muscle spasm below the thigh or below the knee; muscle spasm in the branch of the nerve branch. The area below the calf is partially lost. Electromyography can confirm the diagnosis.

Cause

Drug injection injury, especially injection of penicillin, is the most common cause of sciatic nerve injury, also known as iatrogenic sciatic nerve injury, which occurs in children. The cause of injury is related to improper direct injection of the injection site or the dose of the drug is too large to stimulate the sciatic nerve. Sharp injuries, acetabular fractures, pelvic fractures, and hip dislocations, especially posterior dislocations, are also common causes of sciatic nerve injury.

an examination

Related inspection

Sputum test electromyography random exercise examination cerebrospinal fluid-bound myelin basic protein

1. Exercise: If the injury site is above the large hole of the ischial bone or above the ischial tuberosity, the muscles of the posterior femoral muscle, the anterior, external and posterior muscles of the calf and the muscles of the foot are all paralyzed. For example, in the middle and lower part of the thigh, the muscles of the nematode muscles have been mostly emitted, and only the muscles below the knee are expressed. If it is a branch injury, it is the muscle spasm of the common peroneal nerve and the sacral nerve innervation area.

2. Feeling: Except for the saphenous nerve innervation area on the inner side of the calf and the medial malleolus, the area below the knee disappeared.

3. Nutrition: There are often severe nutritional changes, and there are often deep ulcers on the soles of the feet.

4. History of trauma or history of injection, muscle spasm below the thigh or below the knee, muscle branching in the branch of the nerve branch. The area below the calf is partially lost. Electromyography can confirm the diagnosis.

Differential diagnosis

Differential diagnosis of muscle spas below the thigh or below the knee:

1, lower extremity muscle spasm: lower extremity muscle spasm is a symptom of spinal cord compression.

2, lower limb weakness: lower limb weakness is caused by cervical spondylotic myelopathy, manifested as lower limb weakness, numbness, tightness, heavy lifting and other symptoms, gradually appearing limp, trembling, gait shaking, easy to fall, etc. .

3. Central paralysis of the lower extremities: The central paralysis of the lower extremities is a clinical manifestation of congenital hydrocephalus. When the hydrocephalus is severe and the progress is rapid, it may also appear. The symptom is repeated vomiting. Brain degeneration, brain developmental disorders, central limb spasm, especially lower limbs.

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