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Deltoid fusiform lie parallel to long axis of muscle

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DeltoidFusiformlie parallel to long axis of muscle; belly of muscle is larger indiameter than endsBiceps brachiiTriceps brachiiMuscles of the Head and Neck: include muscles forfacial expression,mastication,movement of tongueandswallowingMuscles of Facial Expression(See figure 7.16, page 170)Buccinator– flattens cheeksDepressor Anguli Oris– depresses mouth angleLevator Labii Superioris– elevates upper lipOccipitofrontalis– elevates eyebrowsOrbicularis Oculi– closes eyeOrbicularis Oris– closes lipZygomaticus Major– elevates & abducts upper lipZygomaticus Minor– elevates & abducts upper lipMuscles of Mastication: involves some of the strongest muscles in the body.(See figure 7.16, page170)Temporalis– elevates & retracts mandibleMasseter– elevates & protracts mandibleLateral Pterygoid– protracts & depresses mandibleMedial Pterygoid– protracts & elevates mandibleTongue and Swallowing Muscles(See figure 7.17, page 171)Tongue MusclesoIntrinsic – changes shape of tongueoExtrinsic – moves tongueHyoid MusclesoSuprahyoid – elevate hyoidoInfrahyoid – depresses hyoidSoft palate –moves soft palate, tongue, or pharynxPharyngeal MusclesoElevators, Constrictors, Superior, Middle, InferiorNeck Muscles(See figures 7.16 & 7.22, pages 170 & 177)Deep Neck MusclesoFlexors – flex head & neckoExtensor – extends head & neckSternocleidomastoid– rotate head
This document and the information thereon is the property ofPHINMA Education (Department of Nursing)3of 8Trapezius– extends & laterally flexes neckTrunk Muscles: include those that move the vertebral column, thorax & abdominal wall, and the pelvicfloor.Muscles Moving the Vertebral Column(See figure 7.18, page 172)Superficial Back MusclesoErector Spinae– extends vertebral column (Iliocostalis,Longissimus,Spinalis)Deep Back Muscles– help bend vertebral column laterallyThoracic Muscles: these are involved almost entirely in breathing process(See figure 7.19, page 174)Scalenes– elevates ribs, inspirationExternal Intercostals– elevate ribs, inspirationInternal Intercostals– depress ribs, forced expirationDiaphragm– depress floor of thorax, inspirationAbdominal Wall Muscles(See figures 7.20 & 7.22, pages 175 & 177)Rectus AbdominisExternal Abdominal ObliqueInternal Abdominal ObliqueTransversus AbdominisCompresses abdomenPelvic Floor and Perineal Muscles(See figure 7.21, page 176)Levator Ani– elevates anus (pelvic floor)Bulbospongiosus– erects penis in male & clitoris in femaleIschiocavernosus– compresses base of penis or clitorisExternal Anal Sphincter– keeps orifice of anal canal closedTransverse PerineioDeep – supports pelvic flooroSuperficial – fixes central tendonUpper Limb Muscles: include those that attach the limb & pectoral girdle to body and those in the arm,forearm, & hand.Muscles acting on the Scapula(See figure 7.22 & 7.23, pages 177-178)Levator Scapulae– elevates, retracts, & rotates scapulaPectoralis Minor– depresses scapulaRhomboids– retracts, rotates, & fixes scapulaSerratus Anterior– rotates & protracts scapulaTrapezius– elevates, depresses, retracts, rotates, & fixes scapulaMuscles for Arm Movements(See figure 7.22 & 7.23, pages 177-178)Deltoid– abducts and medially & laterally rotates armLatissimus Dorsi– adducts & medially rotates armPectoralis Major– flexes shoulderTeres Major– extends shoulderRotator CuffoInfraspinatus – laterally rotates armoSubscapularis – medially rotates armoSupraspinatus – abducts armoTeres Minor – adducts & laterally rotates arm

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Term
Fall
Professor
John Doe
Tags
Muscles of the upper limb, Department of Nursing

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