The Possibility of Left Dominant Activation of the Sensorimotor Cortex During Lip Protrusion in Men

Fukunaga, Atsushi; Ohira, Takayuki; Kamba, Masayuki; Ogawa, Satoshi; Akiyama, Takahiro; Kawase, Takeshi

doi:10.1007/s10548-009-0101-x

Cited by 3 publications

(2 citation statements)

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“…A certain three‐dimensional (3D) stress distribution within the entire labial tissue must be considered to account for the causal factors in lip protrusion. This expression is generally associated with the emotion of anger (Fukunaga et al, ; Al‐Hiyaliet al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Speech production requires bilateral and symmetrical oral muscle movements as well as lip protrusion. The difference between lip protrusion (nonverbal) and speech production is that the former is a simple movement without sound, words, images, or complex tongue movements; different brain areas are activated in the two activities (Fukunaga et al, ; Kent, ). According to previous investigations, lip movements during verbal expressions can be influenced by various environmental stimuli (Gentilucci and Bernardis, ).…”

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional motion analysis of facial movement during verbal and nonverbal expressions in healthy subjects

et al. 2016

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Functional impairments of facial expressions alter the quality of life and their quantitative analysis is key to describing and grading facial function and dysfunction. The aim of this investigation was to quantify 3D lip movements in a group of healthy young subjects. Lip movements during five repetitions of common and random sequences of vowels and nonverbal expressions were recorded using an optoelectronic 3D motion analyzer. The mean maximum displacement of facial landmarks was used to compute 3D unilateral mobility and the symmetry indices (SI) separately for each sex. Facial mobility was significantly greater during open-mouth than closed-mouth smiles. Facial movement among the subjects was largest during articulation of the vowel /a/ and smallest for /i/. Lips were pursed with a SI very close to 95%, while smiles were slightly more asymmetric. The vowel /a/ was articulated with significantly greater symmetry than /e/, /i/ and /u/. The outcomes suggest that the proposed method characterized normal facial animations satisfactorily, so it could be a useful tool for assessing patients with facial lesions and dentofacial deformities. Patient assessment would profit from this quantitative approach, which would reduce discrepancies among several clinical examinations. Clin. Anat. 29:991-997, 2016. © 2016 Wiley Periodicals, Inc.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three‐dimensional motion analysis of facial movement during verbal and nonverbal expressions in healthy subjects

et al. 2016

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Brain Activation During Oral Exercises Used for Dysphagia Rehabilitation in Healthy Human Subjects: A Functional Magnetic Resonance Imaging Study

et al. 2011

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Oral exercises, including tongue, lip, and jaw movements, are commonly used in clinical practice as training to improve oral and pharyngeal swallowing in dysphagia patients. These rehabilitation exercises are believed to affect the peripheral and central nervous system at various levels. However, few studies have examined healthy subjects' brain activity while performing oral exercises used in dysphagia rehabilitation. The current study sought to measure brain activation during oral exercises in healthy subjects using functional magnetic resonance imaging (fMRI). Lip-pursing and lip-stretching, tongue protrusion, lateral tongue movement, and oral ball-rolling were selected as tongue and lip exercise tasks. The tasks were performed by eight healthy subjects, and the fMRI data were submitted to conjunction analyses. The results confirmed that head movements during all tasks exhibited translation of <1.0 mm and rotation of <1.0° in x, y, and z coordinates. We found several clear regions of increased brain activity during all four oral exercises. Commonly activated regions during tongue and lip exercises included the precentral gyrus and cerebellum. Brain activation during ball-rolling was more extensive and stronger compared to the other three oral exercises.

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Neurophysiological origin of human brain asymmetry for speech and language

Morillon

Lehongre

Frackowiak

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

157

135

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The physiological basis of human cerebral asymmetry for language remains mysterious. We have used simultaneous physiological and anatomical measurements to investigate the issue. Concentrating on neural oscillatory activity in speech-specific frequency bands and exploring interactions between gestural (motor) and auditoryevoked activity, we find, in the absence of language-related processing, that left auditory, somatosensory, articulatory motor, and inferior parietal cortices show specific, lateralized, speech-related physiological properties. With the addition of ecologically valid audiovisual stimulation, activity in auditory cortex synchronizes with left-dominant input from the motor cortex at frequencies corresponding to syllabic, but not phonemic, speech rhythms. Our results support theories of language lateralization that posit a major role for intrinsic, hardwired perceptuomotor processing in syllabic parsing and are compatible both with the evolutionary view that speech arose from a combination of syllable-sized vocalizations and meaningful hand gestures and with developmental observations suggesting phonemic analysis is a developmentally acquired process.EEG/functional MRI | natural stimulation | resting state | oscillation A uditory asymmetry (1) and hand preference are traits humans share with other primate and nonprimate species (2-5). Both have been proposed as the functional origin of human cerebral dominance in speech and language (6, 7). The motor theory of language evolution argues that speech evolved from a preexisting manual language (8) involving lateralized hand/ mouth gestures. Such asymmetric control of gesture or pharyngeal musculature could have led to left lateralization of speech and language (9). Conversely, if auditory preceded motor asymmetry in evolution, the alignment of vocalization to gestures (10) might have gradually led to left-lateralized motor and executive language functions (11). It remains unknown and controversial which of these scenarios accounts for asymmetry in speech and language processing, so we set out to find empirical evidence in favor of one or the other.We obtained simultaneous functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) recordings at rest and while watching an ecologically valid stimulus (movie) to identify where brain activity correlates with electrophysiological oscillations in frequency bands related to syllabic and phonemic components of speech. We tested for evidence of lateralization of component-associated frequencies. Our experimental approach was based on two assumptions that have received recent experimental support (12-15): The first is that there are two intrinsic hardwired auditory speech sampling mechanisms, working in parallel, at rates that are optimal for syllabic and phonemic parsing of the input (delta-theta (∼4 Hz) and gamma (∼40 Hz) oscillations, respectively) (6, 16). They shape neuronal firing elicited by auditory stimulation (17) with fast phonemic gamma modulated by slower syllabic theta oscillation...

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The Possibility of Left Dominant Activation of the Sensorimotor Cortex During Lip Protrusion in Men

Cited by 3 publications

References 24 publications

Three‐dimensional motion analysis of facial movement during verbal and nonverbal expressions in healthy subjects

Three‐dimensional motion analysis of facial movement during verbal and nonverbal expressions in healthy subjects

Brain Activation During Oral Exercises Used for Dysphagia Rehabilitation in Healthy Human Subjects: A Functional Magnetic Resonance Imaging Study

Neurophysiological origin of human brain asymmetry for speech and language

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