Deformation/displacement of posterior digastric and sternocleidomastoid muscles during posterior digastric muscle palpation using magnetic resonance imaging and image processing procedure
Identifieur interne : 008526 ( Main/Exploration ); précédent : 008525; suivant : 008527Deformation/displacement of posterior digastric and sternocleidomastoid muscles during posterior digastric muscle palpation using magnetic resonance imaging and image processing procedure
Auteurs : H. Sato ; T. Matsuguma ; M. Ishikawa ; S. Kuramoto ; S. Ukon ; R. Zeze ; J. Kodama [Japon]Source :
- Journal of Oral Rehabilitation [ 0305-182X ] ; 2002-09.
Descripteurs français
- Wicri :
- geographic : Pays-Bas.
English descriptors
- KwdEn :
- Academic centre, Anterior temporalis, Anticipatory activity, Apnoea, Appliance, Arbitrary moulding, Arthrogenous origin, Auscultation, Bennett movement, Bennett side shift, Bilateral, Bilateral clenching, Bilateral measurement, Blackwell, Blackwell science, Bosman department, Botulinum toxin, Bres, Bruxers, Bruxism, Bruxism time index, Central incisor, Centre, Cervical, Cervical spine, Clenching, Clinical assessment, Clinical signs, Complete dentures, Contraction episodes, Contraction time, Contralateral side, Control appliance, Control group, Corresponding amas, Craniomandibular, Craniomandibular disorders, Crown height, Daily stress, Deformation displacement, Dental research, Dentine exposure, Dentistry, Dentistry amsterdam, Denture, Diagnostic criteria, Different design, Different foods, Digastric, Disorder, Edentate people, Edentulous, Edentulous patients, Experimental muscle pain, Experimental occlusal interference, Facial pain, Flemish adolescent girls, Food resistance, Force transducer, Full dentures, Functional impression trays, Functional impressions, Glenoid fossa, Haemodynamic changes, Healthy subjects, Horizontal forces, Hospital anxiety, Hydrodynamic stimulation, Implant, Incisor, Interference period, Interobserver reliability, Interrater reliability, Item scores, Laryngeal, Laryngeal elevation, Laryngeal vibration, Lateral, Lateral pterygoid muscles, Life quality, Little modulation, Local anaesthesia, Local application, Local craniomandibular pain, Lower ridge region, Lower ridge resorption, Magnetic resonance imaging, Main complaint, Mandible, Mandibular, Mandibular contact movements, Mandibular movement, Mandibular movements, Mandibular posture, Masseter, Masseter muscle activity, Masseter muscles, Masticatory, Masticatory muscle palpation, Masticatory muscles, Masticatory performance, Masticatory system, Mcgill pain questionnaire, Molar, Mouth opening, Multiple regression analysis, Muscle activity, Myofascial pain, Myogenous, Myogenous pain, Naeije department, Narrow occlusal surface, Natural environment, Nerve responses, Netherlands, Occlusal, Occlusal anatomy, Occlusal appliance therapy, Occlusal surface, Occlusal tooth, Odds ratio, Okayama university, Oral function, Oral habits, Oral physiology, Oral rehabilitation, Other techniques, Other variables, Outcome variables, Pain intensity, Painful body areas, Palatal, Palatal appliances, Palpation, Patient group, Periodontal receptors, Personality characteristics, Physiology, Physiotherapeutic treatment modalities, Physiotherapy, Physiotherapy group, Positive effect, Posterior digastric, Posterior digastric muscle palpation, Posterior part, Posterior temporalis, Predictor variables, Premature contact, Present study, Pressure onset, Previous study, Prosthetic dentistry, Prosthodontics, Psychological characteristics, Psychological distress, Psychological factors, Psychosomatic disorders, Pulpal blood circulation, Randomized, Recent studies, Recurrent headache, Reliability, Removable prosthodontics, Replacement dentures, Ridge incisal edge, Right masseter muscle, Ring rates, Risk factors, Sagittal distance, Several types, Side mandible, Spearman correlation, Splint therapy, Stabilization appliance, Statistical analysis, Sternocleidomastoid muscles, Stimulation cavity, Stomatognathic physiology, Such treatment, Superior laryngeal nerve, Supramedullary region, Symptom, Temporal muscles, Temporalis, Temporalis muscle, Temporomandibular, Temporomandibular disorders, Temporomandibular joints, Tongue motion, Tooth plastic rims, Treatment contrast, Treatment demand, Treatment effect, Treatment group, Treatment need, Treatment outcome, Twitch force, Unilateral, Unilateral clenching, Vallon department, Vertical distance, Visual analogue scale, Visual analogue scales, Visual feedback, Younger persons.
- Teeft :
- Academic centre, Anterior temporalis, Anticipatory activity, Apnoea, Appliance, Arbitrary moulding, Arthrogenous origin, Auscultation, Bennett movement, Bennett side shift, Bilateral, Bilateral clenching, Bilateral measurement, Blackwell, Blackwell science, Bosman department, Botulinum toxin, Bres, Bruxers, Bruxism, Bruxism time index, Central incisor, Centre, Cervical, Cervical spine, Clenching, Clinical assessment, Clinical signs, Complete dentures, Contraction episodes, Contraction time, Contralateral side, Control appliance, Control group, Corresponding amas, Craniomandibular, Craniomandibular disorders, Crown height, Daily stress, Deformation displacement, Dental research, Dentine exposure, Dentistry, Dentistry amsterdam, Denture, Diagnostic criteria, Different design, Different foods, Digastric, Disorder, Edentate people, Edentulous, Edentulous patients, Experimental muscle pain, Experimental occlusal interference, Facial pain, Flemish adolescent girls, Food resistance, Force transducer, Full dentures, Functional impression trays, Functional impressions, Glenoid fossa, Haemodynamic changes, Healthy subjects, Horizontal forces, Hospital anxiety, Hydrodynamic stimulation, Implant, Incisor, Interference period, Interobserver reliability, Interrater reliability, Item scores, Laryngeal, Laryngeal elevation, Laryngeal vibration, Lateral, Lateral pterygoid muscles, Life quality, Little modulation, Local anaesthesia, Local application, Local craniomandibular pain, Lower ridge region, Lower ridge resorption, Magnetic resonance imaging, Main complaint, Mandible, Mandibular, Mandibular contact movements, Mandibular movement, Mandibular movements, Mandibular posture, Masseter, Masseter muscle activity, Masseter muscles, Masticatory, Masticatory muscle palpation, Masticatory muscles, Masticatory performance, Masticatory system, Mcgill pain questionnaire, Molar, Mouth opening, Multiple regression analysis, Muscle activity, Myofascial pain, Myogenous, Myogenous pain, Naeije department, Narrow occlusal surface, Natural environment, Nerve responses, Netherlands, Occlusal, Occlusal anatomy, Occlusal appliance therapy, Occlusal surface, Occlusal tooth, Odds ratio, Okayama university, Oral function, Oral habits, Oral physiology, Oral rehabilitation, Other techniques, Other variables, Outcome variables, Pain intensity, Painful body areas, Palatal, Palatal appliances, Palpation, Patient group, Periodontal receptors, Personality characteristics, Physiology, Physiotherapeutic treatment modalities, Physiotherapy, Physiotherapy group, Positive effect, Posterior digastric, Posterior digastric muscle palpation, Posterior part, Posterior temporalis, Predictor variables, Premature contact, Present study, Pressure onset, Previous study, Prosthetic dentistry, Prosthodontics, Psychological characteristics, Psychological distress, Psychological factors, Psychosomatic disorders, Pulpal blood circulation, Randomized, Recent studies, Recurrent headache, Reliability, Removable prosthodontics, Replacement dentures, Ridge incisal edge, Right masseter muscle, Ring rates, Risk factors, Sagittal distance, Several types, Side mandible, Spearman correlation, Splint therapy, Stabilization appliance, Statistical analysis, Sternocleidomastoid muscles, Stimulation cavity, Stomatognathic physiology, Such treatment, Superior laryngeal nerve, Supramedullary region, Symptom, Temporal muscles, Temporalis, Temporalis muscle, Temporomandibular, Temporomandibular disorders, Temporomandibular joints, Tongue motion, Tooth plastic rims, Treatment contrast, Treatment demand, Treatment effect, Treatment group, Treatment need, Treatment outcome, Twitch force, Unilateral, Unilateral clenching, Vallon department, Vertical distance, Visual analogue scale, Visual analogue scales, Visual feedback, Younger persons.
Abstract
Objective: As the process of palpation is basically subjective, the scientific evidence for masticatory muscle palpation, especially from an anatomical point of view, is scarce. Our previous study concerning the quantification of masseter muscle deformation during palpation using magnetic resonance imaging and image analysis procedure showed that masseter muscles are deformed and their fascia must be stretched during palpation (Ishikawa et al., Int J Prosthodont, in press). The aim of this study was to further evaluate the deformation/displacement of posterior digastric and sternocleidomastoid muscles during posterior digastric muscle palpation using almost the same procedure as in the previous study. Subjects and methods: Subjects were 10 male volunteers with an average age of 26·8 years. MR images were taken using a 1·5 T scanner (MAGNEX 150 SHIMAZU Co. Ltd, Kyoto, Japan). Images were obtained on the axial plane with a spin‐echo, T1‐weighted technique using a head coil. At first, non‐compressed condition (control) was taken, then the continuously compressed condition of the bilateral posterior digastric muscle region using round plastic balls was taken. By superimposing a compressed image on a non‐compressed image, deformation/displacement was subjectively evaluated and measured using free image analysing software (NIH‐image). Results and conclusion: Deformation of the bilateral posterior digastric muscle was difficult to identify, however, the average amount of displacement in medial direction was 9·0 ± 5·3 mm. Although we tried to compress posterior digastric muscles, sternocleidomastoid muscles were additionally deformed and displaced. The amount of medial displacement was 9·3 ± 4·7 mm. The values contained in our results exhibited fairly substantial variance. These findings suggest that masticatory muscle palpation is subjective and inconsistent.
Url:
DOI: 10.1046/j.1365-2842.2002.01026_33.x
Affiliations:
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Sato</name><affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Matsuguma, T" sort="Matsuguma, T" uniqKey="Matsuguma T" first="T." last="Matsuguma">T. Matsuguma</name><affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Ishikawa, M" sort="Ishikawa, M" uniqKey="Ishikawa M" first="M." last="Ishikawa">M. Ishikawa</name><affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Kuramoto, S" sort="Kuramoto, S" uniqKey="Kuramoto S" first="S." last="Kuramoto">S. Kuramoto</name><affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Ukon, S" sort="Ukon, S" uniqKey="Ukon S" first="S." last="Ukon">S. Ukon</name><affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Zeze, R" sort="Zeze, R" uniqKey="Zeze R" first="R." last="Zeze">R. Zeze</name><affiliation><wicri:noCountry code="no comma">Department of Oral Radiology and</wicri:noCountry></affiliation></author><author><name sortKey="Kodama, J" sort="Kodama, J" uniqKey="Kodama J" first="J." last="Kodama">J. Kodama</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>Department of Oral Anatomy, Fukuoka Dental College</wicri:regionArea><wicri:noRegion>Fukuoka Dental College</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Journal of Oral Rehabilitation</title><title level="j" type="alt">JOURNAL ORAL REHABILITATION</title><idno type="ISSN">0305-182X</idno><idno type="eISSN">1365-2842</idno><imprint><biblScope unit="vol">29</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="884">884</biblScope><biblScope unit="page" to="885">885</biblScope><biblScope unit="page-count">1</biblScope><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2002-09">2002-09</date></imprint><idno type="ISSN">0305-182X</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0305-182X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Academic centre</term><term>Anterior temporalis</term><term>Anticipatory activity</term><term>Apnoea</term><term>Appliance</term><term>Arbitrary moulding</term><term>Arthrogenous origin</term><term>Auscultation</term><term>Bennett movement</term><term>Bennett side shift</term><term>Bilateral</term><term>Bilateral clenching</term><term>Bilateral measurement</term><term>Blackwell</term><term>Blackwell science</term><term>Bosman department</term><term>Botulinum toxin</term><term>Bres</term><term>Bruxers</term><term>Bruxism</term><term>Bruxism time index</term><term>Central incisor</term><term>Centre</term><term>Cervical</term><term>Cervical spine</term><term>Clenching</term><term>Clinical assessment</term><term>Clinical signs</term><term>Complete dentures</term><term>Contraction episodes</term><term>Contraction time</term><term>Contralateral side</term><term>Control appliance</term><term>Control group</term><term>Corresponding amas</term><term>Craniomandibular</term><term>Craniomandibular disorders</term><term>Crown height</term><term>Daily stress</term><term>Deformation displacement</term><term>Dental research</term><term>Dentine exposure</term><term>Dentistry</term><term>Dentistry amsterdam</term><term>Denture</term><term>Diagnostic criteria</term><term>Different design</term><term>Different foods</term><term>Digastric</term><term>Disorder</term><term>Edentate people</term><term>Edentulous</term><term>Edentulous patients</term><term>Experimental muscle pain</term><term>Experimental occlusal interference</term><term>Facial pain</term><term>Flemish adolescent girls</term><term>Food resistance</term><term>Force transducer</term><term>Full dentures</term><term>Functional impression trays</term><term>Functional impressions</term><term>Glenoid fossa</term><term>Haemodynamic changes</term><term>Healthy subjects</term><term>Horizontal forces</term><term>Hospital anxiety</term><term>Hydrodynamic stimulation</term><term>Implant</term><term>Incisor</term><term>Interference period</term><term>Interobserver reliability</term><term>Interrater reliability</term><term>Item scores</term><term>Laryngeal</term><term>Laryngeal elevation</term><term>Laryngeal vibration</term><term>Lateral</term><term>Lateral pterygoid muscles</term><term>Life quality</term><term>Little modulation</term><term>Local anaesthesia</term><term>Local application</term><term>Local craniomandibular pain</term><term>Lower ridge region</term><term>Lower ridge resorption</term><term>Magnetic resonance imaging</term><term>Main complaint</term><term>Mandible</term><term>Mandibular</term><term>Mandibular contact movements</term><term>Mandibular movement</term><term>Mandibular movements</term><term>Mandibular posture</term><term>Masseter</term><term>Masseter muscle activity</term><term>Masseter muscles</term><term>Masticatory</term><term>Masticatory muscle palpation</term><term>Masticatory muscles</term><term>Masticatory performance</term><term>Masticatory system</term><term>Mcgill pain questionnaire</term><term>Molar</term><term>Mouth opening</term><term>Multiple regression analysis</term><term>Muscle activity</term><term>Myofascial pain</term><term>Myogenous</term><term>Myogenous pain</term><term>Naeije department</term><term>Narrow occlusal surface</term><term>Natural environment</term><term>Nerve responses</term><term>Netherlands</term><term>Occlusal</term><term>Occlusal anatomy</term><term>Occlusal appliance therapy</term><term>Occlusal surface</term><term>Occlusal tooth</term><term>Odds ratio</term><term>Okayama university</term><term>Oral function</term><term>Oral habits</term><term>Oral physiology</term><term>Oral rehabilitation</term><term>Other techniques</term><term>Other variables</term><term>Outcome variables</term><term>Pain intensity</term><term>Painful body areas</term><term>Palatal</term><term>Palatal appliances</term><term>Palpation</term><term>Patient group</term><term>Periodontal receptors</term><term>Personality characteristics</term><term>Physiology</term><term>Physiotherapeutic treatment modalities</term><term>Physiotherapy</term><term>Physiotherapy group</term><term>Positive effect</term><term>Posterior digastric</term><term>Posterior digastric muscle palpation</term><term>Posterior part</term><term>Posterior temporalis</term><term>Predictor variables</term><term>Premature contact</term><term>Present study</term><term>Pressure onset</term><term>Previous study</term><term>Prosthetic dentistry</term><term>Prosthodontics</term><term>Psychological characteristics</term><term>Psychological distress</term><term>Psychological factors</term><term>Psychosomatic disorders</term><term>Pulpal blood circulation</term><term>Randomized</term><term>Recent studies</term><term>Recurrent headache</term><term>Reliability</term><term>Removable prosthodontics</term><term>Replacement dentures</term><term>Ridge incisal edge</term><term>Right masseter muscle</term><term>Ring rates</term><term>Risk factors</term><term>Sagittal distance</term><term>Several types</term><term>Side mandible</term><term>Spearman correlation</term><term>Splint therapy</term><term>Stabilization appliance</term><term>Statistical analysis</term><term>Sternocleidomastoid muscles</term><term>Stimulation cavity</term><term>Stomatognathic physiology</term><term>Such treatment</term><term>Superior laryngeal nerve</term><term>Supramedullary region</term><term>Symptom</term><term>Temporal muscles</term><term>Temporalis</term><term>Temporalis muscle</term><term>Temporomandibular</term><term>Temporomandibular disorders</term><term>Temporomandibular joints</term><term>Tongue motion</term><term>Tooth plastic rims</term><term>Treatment contrast</term><term>Treatment demand</term><term>Treatment effect</term><term>Treatment group</term><term>Treatment need</term><term>Treatment outcome</term><term>Twitch force</term><term>Unilateral</term><term>Unilateral clenching</term><term>Vallon department</term><term>Vertical distance</term><term>Visual analogue scale</term><term>Visual analogue scales</term><term>Visual feedback</term><term>Younger persons</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Academic centre</term><term>Anterior temporalis</term><term>Anticipatory activity</term><term>Apnoea</term><term>Appliance</term><term>Arbitrary moulding</term><term>Arthrogenous origin</term><term>Auscultation</term><term>Bennett movement</term><term>Bennett side shift</term><term>Bilateral</term><term>Bilateral clenching</term><term>Bilateral measurement</term><term>Blackwell</term><term>Blackwell science</term><term>Bosman department</term><term>Botulinum toxin</term><term>Bres</term><term>Bruxers</term><term>Bruxism</term><term>Bruxism time index</term><term>Central incisor</term><term>Centre</term><term>Cervical</term><term>Cervical spine</term><term>Clenching</term><term>Clinical assessment</term><term>Clinical signs</term><term>Complete dentures</term><term>Contraction episodes</term><term>Contraction time</term><term>Contralateral side</term><term>Control appliance</term><term>Control group</term><term>Corresponding amas</term><term>Craniomandibular</term><term>Craniomandibular disorders</term><term>Crown height</term><term>Daily stress</term><term>Deformation displacement</term><term>Dental research</term><term>Dentine exposure</term><term>Dentistry</term><term>Dentistry amsterdam</term><term>Denture</term><term>Diagnostic criteria</term><term>Different design</term><term>Different foods</term><term>Digastric</term><term>Disorder</term><term>Edentate people</term><term>Edentulous</term><term>Edentulous patients</term><term>Experimental muscle pain</term><term>Experimental occlusal interference</term><term>Facial pain</term><term>Flemish adolescent girls</term><term>Food resistance</term><term>Force transducer</term><term>Full dentures</term><term>Functional impression trays</term><term>Functional impressions</term><term>Glenoid fossa</term><term>Haemodynamic changes</term><term>Healthy subjects</term><term>Horizontal forces</term><term>Hospital anxiety</term><term>Hydrodynamic stimulation</term><term>Implant</term><term>Incisor</term><term>Interference period</term><term>Interobserver reliability</term><term>Interrater reliability</term><term>Item scores</term><term>Laryngeal</term><term>Laryngeal elevation</term><term>Laryngeal vibration</term><term>Lateral</term><term>Lateral pterygoid muscles</term><term>Life quality</term><term>Little modulation</term><term>Local anaesthesia</term><term>Local application</term><term>Local craniomandibular pain</term><term>Lower ridge region</term><term>Lower ridge resorption</term><term>Magnetic resonance imaging</term><term>Main complaint</term><term>Mandible</term><term>Mandibular</term><term>Mandibular contact movements</term><term>Mandibular movement</term><term>Mandibular movements</term><term>Mandibular posture</term><term>Masseter</term><term>Masseter muscle activity</term><term>Masseter muscles</term><term>Masticatory</term><term>Masticatory muscle palpation</term><term>Masticatory muscles</term><term>Masticatory performance</term><term>Masticatory system</term><term>Mcgill pain questionnaire</term><term>Molar</term><term>Mouth opening</term><term>Multiple regression analysis</term><term>Muscle activity</term><term>Myofascial pain</term><term>Myogenous</term><term>Myogenous pain</term><term>Naeije department</term><term>Narrow occlusal surface</term><term>Natural environment</term><term>Nerve responses</term><term>Netherlands</term><term>Occlusal</term><term>Occlusal anatomy</term><term>Occlusal appliance therapy</term><term>Occlusal surface</term><term>Occlusal tooth</term><term>Odds ratio</term><term>Okayama university</term><term>Oral function</term><term>Oral habits</term><term>Oral physiology</term><term>Oral rehabilitation</term><term>Other techniques</term><term>Other variables</term><term>Outcome variables</term><term>Pain intensity</term><term>Painful body areas</term><term>Palatal</term><term>Palatal appliances</term><term>Palpation</term><term>Patient group</term><term>Periodontal receptors</term><term>Personality characteristics</term><term>Physiology</term><term>Physiotherapeutic treatment modalities</term><term>Physiotherapy</term><term>Physiotherapy group</term><term>Positive effect</term><term>Posterior digastric</term><term>Posterior digastric muscle palpation</term><term>Posterior part</term><term>Posterior temporalis</term><term>Predictor variables</term><term>Premature contact</term><term>Present study</term><term>Pressure onset</term><term>Previous study</term><term>Prosthetic dentistry</term><term>Prosthodontics</term><term>Psychological characteristics</term><term>Psychological distress</term><term>Psychological factors</term><term>Psychosomatic disorders</term><term>Pulpal blood circulation</term><term>Randomized</term><term>Recent studies</term><term>Recurrent headache</term><term>Reliability</term><term>Removable prosthodontics</term><term>Replacement dentures</term><term>Ridge incisal edge</term><term>Right masseter muscle</term><term>Ring rates</term><term>Risk factors</term><term>Sagittal distance</term><term>Several types</term><term>Side mandible</term><term>Spearman correlation</term><term>Splint therapy</term><term>Stabilization appliance</term><term>Statistical analysis</term><term>Sternocleidomastoid muscles</term><term>Stimulation cavity</term><term>Stomatognathic physiology</term><term>Such treatment</term><term>Superior laryngeal nerve</term><term>Supramedullary region</term><term>Symptom</term><term>Temporal muscles</term><term>Temporalis</term><term>Temporalis muscle</term><term>Temporomandibular</term><term>Temporomandibular disorders</term><term>Temporomandibular joints</term><term>Tongue motion</term><term>Tooth plastic rims</term><term>Treatment contrast</term><term>Treatment demand</term><term>Treatment effect</term><term>Treatment group</term><term>Treatment need</term><term>Treatment outcome</term><term>Twitch force</term><term>Unilateral</term><term>Unilateral clenching</term><term>Vallon department</term><term>Vertical distance</term><term>Visual analogue scale</term><term>Visual analogue scales</term><term>Visual feedback</term><term>Younger persons</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Pays-Bas</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Objective: As the process of palpation is basically subjective, the scientific evidence for masticatory muscle palpation, especially from an anatomical point of view, is scarce. Our previous study concerning the quantification of masseter muscle deformation during palpation using magnetic resonance imaging and image analysis procedure showed that masseter muscles are deformed and their fascia must be stretched during palpation (Ishikawa et al., Int J Prosthodont, in press). The aim of this study was to further evaluate the deformation/displacement of posterior digastric and sternocleidomastoid muscles during posterior digastric muscle palpation using almost the same procedure as in the previous study. Subjects and methods: Subjects were 10 male volunteers with an average age of 26·8 years. MR images were taken using a 1·5 T scanner (MAGNEX 150 SHIMAZU Co. Ltd, Kyoto, Japan). Images were obtained on the axial plane with a spin‐echo, T1‐weighted technique using a head coil. At first, non‐compressed condition (control) was taken, then the continuously compressed condition of the bilateral posterior digastric muscle region using round plastic balls was taken. By superimposing a compressed image on a non‐compressed image, deformation/displacement was subjectively evaluated and measured using free image analysing software (NIH‐image). Results and conclusion: Deformation of the bilateral posterior digastric muscle was difficult to identify, however, the average amount of displacement in medial direction was 9·0 ± 5·3 mm. Although we tried to compress posterior digastric muscles, sternocleidomastoid muscles were additionally deformed and displaced. The amount of medial displacement was 9·3 ± 4·7 mm. The values contained in our results exhibited fairly substantial variance. These findings suggest that masticatory muscle palpation is subjective and inconsistent.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><noCountry><name sortKey="Ishikawa, M" sort="Ishikawa, M" uniqKey="Ishikawa M" first="M." last="Ishikawa">M. Ishikawa</name><name sortKey="Kuramoto, S" sort="Kuramoto, S" uniqKey="Kuramoto S" first="S." last="Kuramoto">S. Kuramoto</name><name sortKey="Matsuguma, T" sort="Matsuguma, T" uniqKey="Matsuguma T" first="T." last="Matsuguma">T. Matsuguma</name><name sortKey="Sato, H" sort="Sato, H" uniqKey="Sato H" first="H." last="Sato">H. Sato</name><name sortKey="Ukon, S" sort="Ukon, S" uniqKey="Ukon S" first="S." last="Ukon">S. Ukon</name><name sortKey="Zeze, R" sort="Zeze, R" uniqKey="Zeze R" first="R." last="Zeze">R. Zeze</name></noCountry><country name="Japon"><noRegion><name sortKey="Kodama, J" sort="Kodama, J" uniqKey="Kodama J" first="J." last="Kodama">J. Kodama</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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