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REVIEW INTRO. MUSCLES OF FACE & NECK Rectus fibers Under splenius Oblique fibers Occipitalis The muscle name biceps means it has 2 ____________. origins When a muscle contracts and shortens, its ________ is pulled toward its _________. insertion origin Masseter Temporalis Buccinator What is the term that refers to a ring of muscle that contracts to close an opening; it works much like a drawstring? sphincter The epicranius consists of what 2 muscles? Frontalis Occipitalis What is the primary function of the orbicularis oris? closes and protrudes the lips Zygomaticus Platysma Known as the pouting muscle When you clench your mouth hard, what muscle is the prime mover that can be palpated in the cheek area? masseter The primary function of the frontalis working with the occipitalis is to __________________________. raises eyebrows and creates wrinkles in forehead Orbicularis oris What is the primary function of the zygomaticus? raises the corner of the mouth; smiling Name the Skeletal Muscle Actions: Flexion = decreasing the angle between 2 bones Dorsiflexion = decreasing the angle between the foot and shin; Plantar flexion = pointing toes; Extension = increasing the angle between 2 bones Abduction = moving a body part away from the midline Adduction = moving a body part toward the midline Frontalis What are muscles called that contract to stabilize nearby joints? Synergists Fig. 9.25c Lateral Lateral pterygoid pterygoid What is the primary function of the orbicularis oculi? Close eyes Fig. 9.25c Medial pterygoid The ____________ of a muscle is its immovable (anchored) end. origin Orbicularis oculi Buccinator Also known as the “trumpeter’s muscle” TMJ The primary muscles involved are the following: temporalis, masseter, medial pterygoid, and lateral pterygoid Name the muscles involved with TMJ. Circumduction = movement in a circular (coneshaped) motion Rotation = turning movement of a bone about its long axis; (i.e.atlas/axis) Supination= turn at elbow so palms are up Pronation = turn at elbow so palms are down Inversion = sole of foot in Eversion = sole of foot out Elevation = lifting a body part; (i.e. shoulder shrug) Depression= returning a body part to pre-elevated position. Give the term for the Relative Size of a muscle maximus longus brevis = largest = longest = shortest Frontalis Name the muscle that does this action. Name muscles of facial expression. Orbicularis oculi Orbicularis oris Epicranius (frontalis and occipitalis Buccinator Zygomaticus platysma The frontalis is connected to the occipitalis by the_______________________ epicranial aponeurosis Muscle that causes “crows feet” wrinkles Orbicularis oculi Occipitalis Oribicularis oculi Do you know what TMJ is, its causes and its treatments? Review page 308 in text. the winking muscle Orbicularis oculi Muscle that allows compression on lacrimal gland to secrete tears Orbicularis oculi Platysma The general term for the muscle that contracts to cause the desired action. Prime mover or agonist Orbicularis oris Known as the Kissing Muscle Platysma Name the muscles of mastication. Masseter Temporalis Medial pterygoid Lateral pterygoid. Splenius capitus Give the Term for the Direction of fascicles relative to midline • rectus • transverse • oblique = parallel = perpendicular = at 45o angle Give the Shape of each muscle •deltoid = triangle •trapezius = trapezoid •serratus = saw-toothed orbicularis = circular Frontalis Epicranius aponeurosis Buccinator Zygomaticus Semispinalis capitus Temporalis Platysma Both of the orbicularis muscles are = sphincter muscles a ring of muscle that contracts to close an opening; it works much like a drawstring Orbicularis oris Zygomaticus The “smiling muscle” Sternocleidomastoid