Why do some patients with severe myasthenia gravis need artificial respiration to help them breathe?

Some patients with severe myasthenia gravis experience significant weakness in the respiratory muscles due to the autoimmune attack on acetylcholine receptors at the neuromuscular junction. This muscle weakness can lead to respiratory failure, making it difficult for patients to inhale adequately and maintain sufficient oxygen levels. In such cases, artificial respiration may be required to support breathing and ensure proper oxygenation until the patient's condition stabilizes or improves with treatment.