Which of the following is NOT an ocular muscle?

The biceps brachii is correctly identified as not an ocular muscle because it is located in the arm and primarily functions in elbow flexion and shoulder movement. In contrast, the superior rectus, inferior oblique, and lateral rectus are all muscles that play critical roles in eye movement.

The superior rectus muscle elevates and adducts the eye, while the inferior oblique muscle assists in elevating and abducting the eye. The lateral rectus muscle is responsible for abducting the eye, moving it away from the midline. These three muscles are part of the extraocular muscles that control the movements of the eyeball. Hence, the biceps brachii stands out as the only muscle not involved in ocular function.