**Spasmodic Dysphonia Core Concept**
Spasmodic dysphonia is a type of focal dystonia characterized by involuntary spasms of the vocal cords, leading to abnormal voice production. It is a neurologic disorder that affects the brain's ability to control the muscles of the larynx.

**Why the Correct Answer is Right**
Spasmodic dysphonia is typically divided into two main types: adductor spasmodic dysphonia, characterized by strained, strangled voice production, and abductor spasmodic dysphonia, characterized by breathy, whispery voice production. These symptoms occur due to spasms of the vocal cords, specifically the cricothyroid muscle (in adductor type) or the posterior cricoarytenoid muscle (in abductor type). The exact cause of spasmodic dysphonia is unknown, but it is often associated with stress, anxiety, and other neurologic conditions.

**Why Each Wrong Option is Incorrect**
**Option A:** Spasmodic dysphonia is indeed a type of focal dystonia, which is a neurologic disorder affecting muscle control. However, the question asks for the statement that is "except," so this option may not be the correct answer.

**Option B:** Spasmodic dysphonia is often associated with other neurologic conditions, such as Parkinson's disease, dystonia, and tremor disorders. However, this statement may not be the correct answer.

**Option C:** Spasmodic dysphonia is indeed characterized by abnormal voice production, but this statement is too general and does not provide specific information about the disorder.

**Clinical Pearl / High-Yield Fact**
A key clinical feature of spasmodic dysphonia is the presence of voice breaks, which are sudden interruptions in voice production. These breaks can be a hallmark of the disorder and can help differentiate it from other voice disorders.

**Correct Answer: C.**