dictate NI), or a combined process which investigates the which aspects of noun incorporation can be productively created through general syntactic rules and which must be specified in the lexicon. Of course, this will vary by language as some languages (primarily polysynthetic ones) allow for incorporated structures in a wide variety of sentences whereas in languages such as English, this incorporation is more limited. Theories of morphology-syntax interaction and the debate between syntactic and lexical accounts of NI should strive to be restrictive enough to account for the stable properties of NI in a unified way, but also account for language-specific variations. Within this section, we will focus on describing the influential syntactic and combined approaches to NI, though it is important to note that highly influential lexical accounts, such as Rosen's (1989) paper do exist. One highly influential syntactic account for NI is the head movement process proposed by Baker (1988). This account states that this NI head movement is distinct from but similar to the better-established phenomenon of phrase movement and involves the movement of a head noun out of object position and into a position where it adjoins to a governing verb. An example of this movement can be seen in figure 1 where the head noun 'baby' is moved out of the object N position to become incorporated with the verb as the sister to the verb 'sit'. While this theory does not account for every language, it does provide a starting point for subsequent syntactic analyses of NI, both with and without head movement. A more recent paper by Baker (2007) addresses a number of other influential accounts including Massam’s pseudo-incorporation, Van Geenhoven’s base generation, and Koopman and Szabolcsi’s small phrase movement. It was concluded that while each have their strong points, they all fail to answer some important questions, thus requiring the continued use of Baker's head movement account. Others, including Barrrie and Mattieu (2016) have argued against Baker’s head movement hypothesis. They have investigated Onondaga and Ojibwe and proposed that phrasal movement rather than head movement can account for NI in a number of languages (including Mohawk). Examples from different languages Polysynthetic languages A polysynthetic language is a language in which multiple morphemes, including affixes are often present within a single word. Each word can therefore express the meaning of full clauses or phrase and this structure has implications on how noun incorporation