**Core Concept**
Purkinje cells are a type of neuron found in the cerebellar cortex, playing a crucial role in motor coordination and learning. These cells receive excitatory input from parallel fibers and send inhibitory signals to the cerebellar nuclei, which in turn project to various motor centers in the brain.

**Why the Correct Answer is Right**
Purkinje cells end in the cerebellar nuclei, specifically the dentate nucleus, emboliform nucleus, globose nucleus, and fastigial nucleus. This is due to the inhibitory influence they exert on the cerebellar nuclei, which are responsible for transmitting motor information to the brainstem and spinal cord. The axons of Purkinje cells form a complex network of synapses with the dendrites of cerebellar nuclear cells, facilitating the integration of motor information and the refinement of motor skills.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is not a correct destination for Purkinje cell axons. While the cerebellar nuclei are indeed the primary target, the specific options listed in the question are not accurate.
* **Option B:** This is incorrect because the cerebellar peduncles are actually bundles of nerve fibers that connect the cerebellum to other parts of the brain and spinal cord, rather than the terminal destination of Purkinje cell axons.
* **Option C:** This is incorrect because the cerebellar cortex itself is the location of the cell bodies of Purkinje cells, not their terminal destination.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the cerebellar nuclei receive inhibitory input from Purkinje cells, which helps to refine motor skills and coordination. Damage to the cerebellar nuclei can result in ataxia, a condition characterized by poor coordination and balance.

**Correct Answer: C. Cerebellar nuclei.**