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Long latency components of the jaw jerk and blink reflex in man
Author(s) -
WIDMALM SVENERIK
Publication year - 1982
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1982.tb01037.x
Subject(s) - jaw jerk reflex , glabella , corneal reflex , chin , orbicularis oculi muscle , masseter muscle , reflex , electromyography , anatomy , medicine , psychology , audiology , physical medicine and rehabilitation , anesthesia , ophthalmology , forehead , eyelid
Summary In the present study, the electromyographic (EMG) activity in the masseter and temporal muscles during about 200 ms after chin taps (jaw jerk response) was compared with the EMG activity in the orbicularis oculi after glabella tap (blink reflex). In two of ten subjects components with long latency and duration, analogous to blink reflex components BR 2 and BR 3 , were found in the masseter and temporal muscles. They may represent the mechanical contraction which results in jaw closure. In two of the subjects chin taps were found to elicit late responses in the orbicularis oculi with the same latencies (25–30 and 80–100 ms) as BR 2 and BR 3 associated with glabella tap.