Muscle NameOriginInsertionActionNasalisMaxillary bone; alar cartilage of noseBridge of noseCompresses nostrils; dilates nostrilsOrbicularis oculisMedial aspect of bony orbitSkin around eyelidsCloses eyelid; acts during squinting and blinkingOrbicularis orisMaxillary bone; mandibleLipsCloses and protrudes lips as in speaking, kissing, and whistlingBuccinatorMaxillary bone; mandibleBlends with fibers of orbicularis orisCompresses cheek while whistling or blowingZygomaticus majorZygomatic boneAngle of mouthRaises lateral corner of mouth for smilingZygomaticus minorZygomatic boneUpper lipRaises upper lipLevator Labii SuperiorisInferior aspect of bony orbitBlends with fibers of orbicularis orisElevates upper lip; dilates nostrilsDepressor Anguli OrisAnterolateral surface of mandibleSkin at angle of mouthDepresses angle of mouthDepressor Labii InferiorisAnterolateral surface of mandibleSkin of lower lipDepresses lower lipMentalisAnterior surface of mandibleSkin of chinProtrudes lower lip; wrinkles skin on chinMasseterZygomatic archLateral Surface of mandibular ramusElevates mandible to close jaw; protrudes mandibleTemporalisTemporal boneCoronoid process of mandibleElevates mandible to close jaw; retrudes mandibleHyoglossusHyoid boneTongueDepresses tongueSternocleidomastoid Manubrium; medial one-third of clavicleMastoid process; occipital bone near mastoid processFlexion and lateral flexion of neck; rotates head so that face is turned superiorly and to the opposite sideMylohyoidInferior margin of mandible at the chinHyoid boneElevates hyoid bone, tongue, and floor of mouth during swallowing and speakingFor Quiz #5: Axial Muscles
SternohyoidManubriumHyoid boneDepresses larynx and hyoid bone during swallowingThyrohyoidThyroid cartilage of larynxHyoid boneDepresses hyoid bone; elevates larynxSpleniusSpinous processes of inferior cervical and superior thoracic vertebraeMastoid process, occipital bone and transverse processes of superior cervical vertebraeLaterally flexes, rotates, and extends head and neckScalenes(Posterior, middle, and anterior)Transverse processes of cervical vertebraeFirst and second ribsLateral flexion of neck; elevates ribs 1 and 2 during forced inspirationLevator ScapulaeTransverse processes of superior four cervical vertebraeMedial border of scapula near superior angleElevates scapula; inferior rotation of scapulaExternal intercostalsInferior border of superior ribSuperior border of inferior ribElevates the ribs during normal inspirationInternal IntercostalsSuperior border of inferior ribInferior border of superior ribDepresses the ribs during forced expirationRectus AbdominisPubic crest; pubic symphysis
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- Winter '08