Biomaterial Database

Jaw muscle silent periods by tooth tap and chin tap. 1981

W D McCall, and M Hoffer

Electromyographic silent periods from jaw closing muscles were elicited during a clench by tapping on the chin and on selected teeth both in asymptomatic subjects and in subjects reporting symptoms of temporomandibular joint dysfunction. The mean duration in response to a chin tap was significantly shorter in the asymptomatic group than in the dysfunction group. No significant differences in mean duration elicited by tooth taps were found between groups. Other comparisons of mean durations such as among muscles, among teeth, or between chin taps and tooth taps failed to achieve statistical significance.

UI	MeSH Term	Description	Entries
D008410	Masticatory Muscles	Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)	Masticatory Muscle,Muscle, Masticatory,Muscles, Masticatory
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D010474	Percussion	Act of striking a part with short, sharp blows as an aid in diagnosing the condition beneath the sound obtained.	Percussions
D002680	Chin	The anatomical frontal portion of the mandible, also known as the mentum, that contains the line of fusion of the two separate halves of the mandible (symphysis menti). This line of fusion divides inferiorly to enclose a triangular area called the mental protuberance. On each side, inferior to the second premolar tooth, is the mental foramen for the passage of blood vessels and a nerve.	Mental Region,Mentum
D004576	Electromyography	Recording of the changes in electric potential of muscle by means of surface or needle electrodes.	Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013704	Temporomandibular Joint	An articulation between the condyle of the mandible and the articular tubercle of the temporal bone.	TMJ,Joint, Temporomandibular,Joints, Temporomandibular,Temporomandibular Joints
D013706	Temporomandibular Joint Dysfunction Syndrome	A symptom complex consisting of pain, muscle tenderness, clicking in the joint, and limitation or alteration of mandibular movement. The symptoms are subjective and manifested primarily in the masticatory muscles rather than the temporomandibular joint itself. Etiologic factors are uncertain but include occlusal dysharmony and psychophysiologic factors.	Myofascial Pain Dysfunction Syndrome, Temporomandibular Joint,TMJ Syndrome,Temporomandibular Joint Syndrome,Costen's Syndrome,Costen Syndrome,Costens Syndrome,Joint Syndrome, Temporomandibular,Syndrome, Costen's,Syndrome, TMJ,Syndrome, Temporomandibular Joint
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor
D014070	Tooth	One of a set of bone-like structures in the mouth used for biting and chewing.	Teeth