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Hypothyroidism II: Pathophysiology

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...

Hyperthyroidism II: Pathophysiology

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...

Hyperthyroidism I: Introduction

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Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...

Graves' Disease I: Introduction

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Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...

Graves Disease II: Pathophysiology

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...

The Thyroid Gland

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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
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Speech impairment in primary hypothyroidism.

A Mohammadzadeh¹, E Heydari, F Azizi

¹Endocrine Research Center, Research Institute of Endocrine Sciences, Shahid Beheshti University, (M.C.), Tehran, Iran.

Journal of Endocrinological Investigation

|July 13, 2011

Summary

This summary is machine-generated.

Hypothyroidism, a thyroid hormone deficiency, frequently causes speech and voice disturbances. This study found significant differences in voice parameters in hypothyroid patients compared to controls.

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Area of Science:

Endocrinology
Speech-Language Pathology
Otolaryngology

Background:

Thyroid hormone deficiency, known as hypothyroidism, can impact various bodily functions, including speech and voice production.
Previous research suggests a potential link between thyroid dysfunction and vocal changes, but detailed analysis is often limited.

Purpose of the Study:

To investigate and quantify speech and voice alterations in individuals diagnosed with hypothyroidism.
To compare speech parameters between patients with hypothyroidism and a healthy control group.

Main Methods:

A case-control study design was employed, comparing 120 hypothyroid patients with 88 age-, sex-, and smoking-matched healthy controls.
Speech and voice parameters were assessed using the Visipitch III system and multidimensional voice program software.
Serum concentrations of thyroid hormones (T4, T3) and thyroid-stimulating hormone (TSH) were measured to confirm diagnosis and correlate with speech findings.

Main Results:

Patients with hypothyroidism reported symptoms such as throat dryness and a sensation of a lump in the throat.
Significant differences were observed in fundamental frequency, voice turbulence index, and soft phonation index between hypothyroid patients and controls.
A positive correlation was found between elevated TSH levels and variations in fundamental frequency and the prevalence of voice disorders.

Conclusions:

Speech and voice disturbances are common in individuals with primary hypothyroidism.
The findings highlight the importance of considering vocal health in the assessment and management of hypothyroidism.