Final answer:
Bell's palsy is primarily associated with the facial nerve (CN VII), which controls facial expressions, taste sensations, and a muscle in the ear. Other cranial nerves like CN V, CN IX, and CN X have roles in facial and neck senses and functions but are not directly affected by Bell's palsy.
Step-by-step explanation:
The facial cranial nerves associated with Bell's palsy are primarily involved with the facial nerve (CN VII). Bell's palsy is a condition that causes sudden weakness in the muscles on one side of the face. The facial nerve is responsible for controlling the muscles of facial expression, the stapedius muscle in the ear, and for carrying taste sensations from the anterior two-thirds of the tongue and soft palate. While other cranial nerves such as the trigeminal nerve (CN V), glossopharyngeal nerve (CN IX), and vagus nerve (CN X) carry some autonomic functions and play roles in the senses and motor functions of the face and neck, it is the facial nerve that is directly affected in Bell's palsy.