Underdeveloped muscles of the shoulder girdle

Introduction The muscles underdeveloped in the scapula are anterior scalene syndrome (pre-slant syndrome) refers to the nerves that become smaller due to anterior and middle scalene hypertrophy or because of anatomical variations. Symptoms and clinical manifestations of syndromes that occur in arteries. The disease is related to the triangular space formed by the oblique muscles of the neurovascular bundle. The group of anterior scalene muscles occurs in middle-aged people, more women than men, and the right side is more than the left side. The patient generally has muscles that are sagging shoulders and shoulder straps.

Cause

The disease is related to the triangular space formed by the oblique muscles of the neurovascular bundle.

1. Congenital malformation: The anterior middle scalene muscle is fused into one piece, so the brachial plexus must be detached from the fibers of the anterior and middle scalene muscles.

2, anterior scale muscle hypertrophy: can be primary, or secondary anterior scalene tendon caused by stimulation of the brachial plexus.

3. The attachment point of the anterior scalene muscle causes the narrowing of the triangular gap.

In all three cases, the neurovascular bundle can be compressed to produce the scalene syndrome.

an examination

Related inspection

Electromyography neurological examination

The group of anterior scalene muscles occurs in middle-aged people, more women than men, and the right side is more than the left side. The patient generally has muscles that are sagging shoulders and shoulder straps. The symptoms vary depending on the tissue being compressed.

1. Subclavian artery compression: The pain is ischemic and migraine, and the onset can be sudden, accompanied by soreness and discomfort. Beginning with the neck radiating to the hands and fingers, the numbness and tingling are obvious, and there is no clear boundary between the painful parts. The activity of the cervical vertebra can aggravate the pain. When the neck is straightened, the space between the scale muscles becomes smaller and the pain is aggravated. The neck flexion can increase the space between the scale muscles and the pain can be relieved. Traction of the affected limb causes the scapula to descend, which can aggravate the symptoms.

2. Brachial plexus compression: This condition occurs in long-term lesions, and the underlying brachial plexus is compressed, which is acute pain and radiates from the inside of the forearm and 4 and 5 fingers.

3. The subclavian artery and brachial plexus are simultaneously compressed and have the same symptoms as the cervical rib.

The patient often supports the head with his hand to tilt it toward the affected side, thereby relieving the tension of the anterior scalene muscle. In the supraclavicular fossa, the anterior scalene muscles are tense and tender. Pressing the muscles causes severe tenderness and radiation pain, and the neck stretches and aggravates the pain. Sometimes allergies and coldness in the hands, movement disorders and reflexes disappear. Local injection of anesthetic can relieve the symptoms of the anterior scalene muscle and relieve the symptoms.

Differential diagnosis

1, the shoulder strap "simulation": the clinical manifestations of pediatric cooking syndrome upper limbs are abnormal, second, triceps pain, shoulder strap "simulation". Cooks syndrome was first reported by Kwork. After eating Chinese food, a combination of symptoms - "burning", "pressing", "tightening" or "numbing" on the face, neck, upper chest, back and arms "I feel a sense of sensation or general fatigue, accompanied by a palpitative paroxysmal symptom, called Chinese restaurant syndrome." Its alias is still delicious syndrome, Chinese headache, eating Chinese food syndrome, Japanese restaurant syndrome. In the past, there was also a syndrome called glutamate intake.

2, hand muscle atrophy: hand muscle atrophy is a kind of muscle atrophy. Muscle atrophy refers to the reduction of muscle volume caused by dystrophic dystrophy, muscle fiber thinning or even disappearance.

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