Journal
CURRENT OPINION IN NEUROBIOLOGY
Volume 28, Issue -, Pages 15-21Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.conb.2014.05.006
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Funding
- National Institute on Deafness and Other Communication Disorders, National Institutes of Health [R01DC011805, R01DC012545, R00DC009629]
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Our ability to learn and control the motor aspects of complex laryngeal behaviors, such as speech and song, is modulated by the laryngeal motor cortex (LMC), which is situated in the area 4 of the primary motor cortex and establishes both direct and indirect connections with laryngeal motoneurons. In contrast, the LMC in monkeys is located in the area 6 of the premotor cortex, projects only indirectly to laryngeal motoneurons and its destruction has essentially no effect on production of species-specific calls. These differences in cytoarchitectonic location and connectivity may be a result of hominid evolution that led to the LMC shift from the phylogenetically 'old' to 'new' motor cortex in order to fulfill its paramount function, that is, voluntary motor control of human speech and song production.
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