On this page. Chapter 5: Facial sensations & movements. In this chapter, the functions of the trigeminal (CN V) and facial (CN VII) nerves will be discussed. Symptoms of damage to the trigeminal system are mainly loss of sensation in the face, although the mandibular division of the trigeminal nerve also controls jaw motion.
Definition of cumulative for English Language Learners. : 1  increasing or becoming better or worse over time through a series of additions. : 2  including or adding together all of the things that came before.
1 : the act or process of forming a sum : addition. 2 : sum, total. 3 : cumulative action or effect; especially : the process by which a sequence of stimuli that are individually inadequate to produce a response are cumulatively able to induce a nerve impulse.