Final answer:
Anterograde amnesia patients can form new procedural memories but not declarative memories, allowing them to learn tasks without conscious recall of these learning experiences.
Step-by-step explanation:
Patients suffering from anterograde amnesia are typically able to form new procedural memories but not new declarative memories. This means that while they may struggle to recall new facts or events (episodic or semantic memories), they can still learn tasks that involve motor skills, such as riding a bicycle, without being aware they have learned them. For example, the famous patient H.M. had a surgery that resulted in anterograde amnesia, yet he was still able to improve at performing puzzles over time, indicating the ability to form procedural memories.