title: Mentalis muscle related reflexes.
abstract: The mentalis muscle (MM) arises from the incisive fossa of the mandible, raises and protrudes the lower lip. Here, we aim to characterize responses obtained from MM by supraorbital and median electrical as well as auditory stimuli in a group of 16 healthy volunteers who did not have clinical palmomental reflex. Reflex activities were recorded from the MM and orbicularis oculi (O.oc) after supraorbital and median electrical as well as auditory stimuli. Response rates over MM were consistent after each stimulus, however, mean latencies of MM response were longer than O.oc responses by all stimulation modalities. Shapes and amplitudes of responses from O.oc and MM were similar. Based on our findings, we may say that MM motoneurons have connections with trigeminal, vestibulocochlear and lemniscal pathways similar to other facial muscles and electrophysiological recording of MM responses after electrical and auditory stimulation is possible in healthy subjects.
authors.affiliation: Department of Neurology, I.U. Cerrahpasa Medical School, K.M.Pasa, 34098, Istanbul, Turkey. draysegulgunduz@yahoo.com.
authors.forename: Ayşegül
authors.initials: A
authors.lastname: Gündüz
authors.affiliation: Department of Neurology, I.U. Cerrahpasa Medical School, K.M.Pasa, 34098, Istanbul, Turkey.
authors.forename: Özlem
authors.initials: Ö
authors.lastname: Uyanık
authors.affiliation: Department of Neurology, I.U. Cerrahpasa Medical School, K.M.Pasa, 34098, Istanbul, Turkey.
authors.forename: Özdem
authors.initials: Ö
authors.lastname: Ertürk
authors.affiliation: Department of Neurology, I.U. Cerrahpasa Medical School, K.M.Pasa, 34098, Istanbul, Turkey.
authors.forename: Melis
authors.initials: M
authors.lastname: Sohtaoğlu
authors.affiliation: Department of Neurology, I.U. Cerrahpasa Medical School, K.M.Pasa, 34098, Istanbul, Turkey.
authors.forename: Meral Erdemir
authors.initials: ME
authors.lastname: Kızıltan
mesh_terms: D000161:Acoustic Stimulation; D000368:Aged; D004576:Electromyography; D005152:Facial Muscles / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008875:Middle Aged; D010812:Physical Stimulation; D011930:Reaction Time / Q000502:physiology; D012018:Reflex / Q000502:physiology*; D014276:Trigeminal Nerve / Q000502:physiology; D000159:Vestibulocochlear Nerve / Q000502:physiology
keywords: Blink reflex; Brainstem; Mentalis muscle; Reflex