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1. Introduction
Myxoedema is a health disorder directly associated with an inadequate secretion of the thyroid hormone (thyroxine) in adults. This hormone plays a critical role in regulating metabolism. When thyroxine levels drop, various physiological changes arise that underscore the essential functions of this hormone in adult human bodies.
2. Causes of Myxoedema
The primary cause of myxoedema is the deficiency of the thyroid hormone, also known as thyroxine. This deficiency generally occurs if the thyroid gland is not producing enough thyroxine, which can result from:
Autoimmune thyroid disease (e.g., Hashimoto’s thyroiditis).
Underlying deficiencies in iodine intake (though more commonly related to goitre).
Surgical removal or damage to the thyroid gland.
3. Key Characteristics
Low metabolic rate: Inadequate thyroxine results in decreased cellular respiration and overall metabolic activity.
Increase in body weight: As metabolism slows, caloric utilization decreases, leading to weight gain.
Tendency to retain water in tissues: This causes puffiness and swelling, particularly noticeable in the face and extremities.
4. Physiological Basis
Thyroxine, secreted by the thyroid gland, regulates various metabolic processes within the body. When its levels are below normal, cells do not metabolize nutrients efficiently, leading to low energy production and multiple symptoms such as fatigue, weight gain, and edema (water retention). This set of symptoms observed in adults is collectively referred to as myxoedema.
5. Conclusion
Myxoedema describes the condition resulting specifically from hypothyroidism in adulthood, characterized by a low metabolic rate, weight gain, and fluid retention in the tissues. It underscores the critical importance of thyroid hormones in maintaining normal physiological functions. Timely diagnosis and treatment, which involves thyroid hormone replacement, can effectively manage and often reverse these symptoms.
