This dissertation investigates how boundary temporal and tonal events are coordinated to oral constrictions in Greek. Regarding the temporal events, most studies agree in that boundary lengthening is cumulative (i.e., larger the stronger the boundary) (e.g., Cho & Keating 2001, Tabain 2003b) and progressive (i.e., decreasing with distance from the boundary) (e.g., Berkovits 1993a, 1993b). However, its exact scope (i.e. the stretch of speech that undergoes the effect) and its interaction with prominence constitute open questions for current research (e.g., Byrd & Riggs 2008, Turk & Shattuck-Hufnagel 2007). With respect to the tonal events, the coordination of boundary tone has not been experimentally investigated. Aiming for a clearer understanding of prosodic boundaries and, more broadly, of prosody, we explore simultaneously the scope of boundary lengthening and the coordination of boundary tones as a function of lexical stress and pitch accent. We assess these issues in a variety of syntactic constructions (eliciting different types of boundary tones) via an articulatory magnetometer (EMA) study of Greek. The results indicate that pre-boundary lengthening affects the constrictions that immediately precede the boundary in oxytone words, but is initiated further leftward from the boundary in pro-paroxytone and paroxytone words. Lengthening scopes over a continuous stretch of speech from its onset to the boundary, and it advances in this stretch progressively. Constrictions early in the phrase-final word shorten on a speaker-dependent basis. These temporal properties of phrase-final words remain stable regardless of their accentual status (accented or de-accented). As for the coordination of boundary tones, their onset co-occurs with the articulatory target of the final vowel. This timing is further modified by stress; the boundary tone is initiated earlier as the stress occurs earlier within the word. This effect is observed both in accented and de-accented phrase-final words. Accented words present even earlier boundary tone initiation than de-accented ones, which is presumably a side-effect of accentual lengthening. Hence, lexical stress exerts a similar effect on the scope of boundary lengthening and the coordination of boundary tones. In addition, phrase-final words are followed by pauses involving specific vocal tract configurations, called here pause postures. The point of achievement of these pause postures occurs at a stable temporal distance from the onset of boundary tones regardless of the position of lexical stress. The duration of the articulatory movements forming the pause postures is longer in oxytone words than in pro-paroxytone and paroxytone words. Based on these results, a novel theoretical account of boundaries within the framework of Articulatory Phonology (cf. Browman & Goldstein 1992) and the pi-gesture model (Byrd & Saltzman 2003) is proposed: Rather than seeing lexical stress, boundary lengthening, boundary tones and pauses as independent entities, a complex set of coordinations between these prosodic events is suggested. The implications of this account for an architecture of prosody that captures both lexical and phrasal events, and both boundaries and prominence are discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]