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Abstract:
The evolution of the control of tongue movements accounts for
the range of possible sounds in speech. This evolution (both in
its phylogenic and developmental aspects) depends on
modifications of anatomical structures such as the evolution of
the shape of the hard palate bone. This modification could
account for a better control of lateral tongue movements which
are important, both to generate some consonants and for
co-articulation factors. Aerodynamic constraints on speech must
also play a role but the co-evolution of neurological structures
involved in feedback process must be taken into consideration if
one wants to explain the emergence and control of manners of
articulations in sound patterns. This paper will examine data
from comparative anatomy in order to hypothesize how the
co-evolution of these various parameters could account for the
emergence and control of tongue movements involved in speech.
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