Final answer:
Lesions to the accessory and oculomotor cranial nerves can lead to difficulties in orienting the head and eye movements.
Step-by-step explanation:
When a patient turns their head in order to see, it could indicate lesions to two cranial nerves: the accessory nerve (cranial nerve XI) and the oculomotor nerve (cranial nerve III).
The accessory nerve primarily controls movements of the neck, and damage to this nerve can affect a patient's ability to orient their head. The oculomotor nerve controls eye movements, including the ability to track objects with the eyes. Lesions to either of these nerves can result in difficulty in performing these functions.