Features of Friedreich’s Ataxia include all of the following except:
**Core Concept**
Friedreich's Ataxia (FRDA) is a rare, autosomal recessive inherited disorder caused by a mutation in the FXN gene, leading to deficiency of the mitochondrial protein frataxin. This deficiency disrupts iron-sulfur cluster biogenesis, resulting in mitochondrial dysfunction and oxidative stress.
**Why the Correct Answer is Right**
Friedreich's Ataxia is characterized by progressive damage to the spinal cord, peripheral nerves, and the cerebellum, leading to symptoms such as:
- **Ataxia**: gait and limb ataxia due to cerebellar involvement
- **Dysarthria**: slurred speech due to damage to the cranial nerves
- **Optic atrophy**: vision loss due to degeneration of the optic nerve
- **Hypertrophic cardiomyopathy**: thickening of the heart muscle leading to heart failure
- **Sensory neuropathy**: loss of sensation in the limbs
**Why Each Wrong Option is Incorrect**
**Option A:** Friedreich's Ataxia is not typically associated with **Muscle weakness**. While patients may experience fatigue, muscle weakness is not a hallmark feature of FRDA.
**Option B:** Friedreich's Ataxia is not typically associated with **Seizures**. Seizures are not a common feature of this condition.
**Option C:** Friedreich's Ataxia is not typically associated with **Cognitive decline**. Cognitive function is generally preserved in FRDA patients.
**Clinical Pearl / High-Yield Fact**
Friedreich's Ataxia is a classic example of a mitochondrial disorder, highlighting the importance of **mitochondrial function** in maintaining cellular health.
**Correct Answer: B. Seizures**