Abstract：
:The organization of motor responses in the orbicularis oris muscle following the delivery of punctate mechanical inputs to vermilion skin of the lips was studied in a group of young infants, school-age children, and adults during periods of voluntary lip muscle activation. A specially designed multi-point array skin contactor, coupled to a position-servo controlled linear motor, was highly effective in driving the early component of the perioral reflex (R1). Overall, the evoked R1 response obtained from the infant was of variable amplitude relative to the children and adults, lacked response specificity, and occurred at a longer latency. This brainstem mediated sensorimotor action appears to take on several characteristics of the adult form by the age of 12. The emergence and maturation of mechanically evoked perioral reflexes is discussed in relation to the acquisition of motor skills, including speech and smiling.
journal_name
Brain Resjournal_title
Brain researchauthors
Barlow SM,Finan DS,Bradford PT,Andreatta RDdoi
10.1016/0006-8993(93)91425-rsubject
Has Abstractpub_date
1993-10-01 00:00:00pages
181-8issue
2eissn
0006-8993issn
1872-6240pii
0006-8993(93)91425-Rjournal_volume
623pub_type
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