Animal models, songbirds particularly, are increasingly used to study the human capacity for speech and language. In the light of understanding both language evolution and individual language... Show moreAnimal models, songbirds particularly, are increasingly used to study the human capacity for speech and language. In the light of understanding both language evolution and individual language acquisition these models are highly valuable, provided that they are studied within a valid comparative framework. In the past few decades, non-invasive methods such as functional Magnetic Resonance Imaging (fMRI) and Near-InfraRed Spectroscopy (NIRS) have become available for human as well as animal brain research. In the studies discussed in this thesis, fMRI is employed to unravel the neural correlates of vocal learning in the human and songbird brain. Specifically, fMRI in both songbirds and humans is used to study the neural mechanisms underlying birdsong learning and human artificial grammar learning. In a series of fMRI studies investigating these neural mechanisms in adult and juvenile zebra finches and human adults, this thesis compares the neural substrates of song learning in birds with those of language learning in humans. Studies in both species show correlations between behavioral learning of song or speech and neural activity. These results contribute to the songbird model for human vocal learning. Show less
This thesis investigates the grammar of Makhuwa-Enahara, a Bantu language spoken in the north of Mozambique. The information structure is an influential factor in this language, determining the... Show moreThis thesis investigates the grammar of Makhuwa-Enahara, a Bantu language spoken in the north of Mozambique. The information structure is an influential factor in this language, determining the word order and the use of special conjugations known as conjoint and disjoint verb forms. The thesis consists of two parts. The first part is a grammatical description of the language, covering the basic properties in the phonology, prosody and morphology of the nominal and verbal domain, as well as an overview of the conjugational system. The chapter also examines some syntactic issues, such as relativisation and non-verbal predication. The second part is concerned with the question how syntax and information structure interact in Makhuwa-Enahara. The elements in a sentence are positioned before or after the verb on the basis of their information structure. Elements in the preverbal domain are interpreted as more accessible, functioning as topics. The disjoint verb and elements in the postverbal domain form the comment. The element immediately following the conjoint verb form is interpreted not just as new information, but as exclusive, meaning that the proposition holds for that referent and not for (some) other referents. These data can be accounted for if insights from syntax and information structure are combined. Two such approaches are discussed: a cartographic model and an interface model. Two interface rules are proposed to account for the interpretation of word order and the conjoint and disjoint verb forms in Makhuwa-Enahara. Show less