**Core Concept**
Windshield wiper syndrome, also known as "sine wave" or "saw-toothed" pattern, is a type of abnormal electroencephalogram (EEG) pattern observed in patients with a specific underlying condition. This pattern is characterized by a slow, sinusoidal, or saw-toothed waveform that resembles the motion of a windshield wiper.

**Why the Correct Answer is Right**
Windshield wiper syndrome is typically seen in patients with Creutzfeldt-Jakob disease (CJD), a rare, degenerative, and fatal brain disorder caused by a prion protein. The characteristic EEG pattern in CJD is thought to result from the abnormal prion protein's disruption of normal neuronal function and synaptic connectivity. This disruption leads to the generation of abnormal electrical activity, manifesting as the distinctive windshield wiper pattern.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect because windshield wiper syndrome is not typically associated with Alzheimer's disease, which presents with a different set of clinical and EEG features.
* **Option B:** This is incorrect because frontotemporal dementia (FTD) can present with a variety of EEG abnormalities, but windshield wiper syndrome is not a characteristic feature.
* **Option C:** This is incorrect because mitochondrial encephalopathies can present with a range of EEG abnormalities, but windshield wiper syndrome is not a specific or characteristic feature.

**Clinical Pearl / High-Yield Fact**
When encountering a patient with a characteristic windshield wiper EEG pattern, it is essential to consider Creutzfeldt-Jakob disease in the differential diagnosis, particularly if the patient presents with rapidly progressive dementia and myoclonus.

**Correct Answer:** C. Creutzfeldt-Jakob disease