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Sequence and hierarchy in vocal rhythms and phonology.
1Department of Cognitive Biology, University of Vienna, Vienna, Austria.
Annals of the New York Academy of Sciences
|August 15, 2019
Summary
Human speech evolved from primate jaw oscillations and phonation, requiring both phonetic content diversification and novel hierarchical motor control. This phonological hierarchy enabled syntactic structures, supported by primate and birdsong data.
Area of Science:
- Evolutionary biology
- Neuroscience
- Linguistics
Background:
- The frame/content model proposes human speech evolved from primate jaw oscillations (lip smacks) combined with phonation.
- Recent data support this evolutionary pathway for speech origins.
Purpose of the Study:
- To explore the neural and evolutionary origins of phonological hierarchy.
- To propose two key components for speech motor control evolution.
Main Methods:
- Review of comparative and neural data from nonhuman primates and birdsong.
- Analysis of the frame/content model and its implications for speech evolution.
Main Results:
- Speech motor control evolution involved phonetic content diversification (achievable by primates) and hierarchical rhythmic structure imposition.
- Hierarchical motor control, potentially from tool use or music, is crucial for phonological capacity.
Conclusions:
- Phonological hierarchy, built on primate sequential capacities and novel hierarchical control, enabled syntactic hierarchy.
- The evolution of speech motor control is a complex process with distinct, yet integrated, components.
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