✔DeltoidFusiformlie parallel to long axis of muscle; belly of muscle is larger indiameter than ends✔✔Biceps 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 cheeks▪Depressor Anguli Oris– depresses mouth angle▪Levator Labii Superioris– elevates upper lip▪Occipitofrontalis– elevates eyebrows▪Orbicularis Oculi– closes eye▪Orbicularis Oris– closes lip▪Zygomaticus Major– elevates & abducts upper lip▪Zygomaticus Minor– elevates & abducts upper lipMuscles of Mastication: involves some of the strongest muscles in the body.(See figure 7.16, page170)▪Temporalis– elevates & retracts mandible▪Masseter– elevates & protracts mandible▪Lateral Pterygoid– protracts & depresses mandible▪Medial Pterygoid– protracts & elevates mandibleTongue and Swallowing Muscles(See figure 7.17, page 171)▪Tongue MusclesoIntrinsic – changes shape of tongueoExtrinsic – moves tongue▪Hyoid MusclesoSuprahyoid – elevate hyoidoInfrahyoid – depresses hyoid▪Soft palate –moves soft palate, tongue, or pharynx▪Pharyngeal MusclesoElevators, Constrictors, Superior, Middle, InferiorNeck Muscles(See figures 7.16 & 7.22, pages 170 & 177)▪Deep Neck MusclesoFlexors – flex head & neckoExtensor – extends head & neck▪Sternocleidomastoid– rotate head
This document and the information thereon is the property ofPHINMA Education (Department of Nursing)3of 8▪Trapezius– 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, inspiration▪External Intercostals– elevate ribs, inspiration▪Internal Intercostals– depress ribs, forced expiration▪Diaphragm– depress floor of thorax, inspirationAbdominal Wall Muscles(See figures 7.20 & 7.22, pages 175 & 177)▪Rectus Abdominis▪External Abdominal Oblique▪Internal Abdominal Oblique▪Transversus 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 female▪Ischiocavernosus– compresses base of penis or clitoris▪External Anal Sphincter– keeps orifice of anal canal closed▪Transverse 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 scapula▪Pectoralis Minor– depresses scapula▪Rhomboids– retracts, rotates, & fixes scapula▪Serratus Anterior– rotates & protracts scapula▪Trapezius– elevates, depresses, retracts, rotates, & fixes scapulaMuscles for Arm Movements(See figure 7.22 & 7.23, pages 177-178)▪Deltoid– abducts and medially & laterally rotates arm▪Latissimus Dorsi– adducts & medially rotates arm▪Pectoralis Major– flexes shoulder▪Teres Major– extends shoulder▪Rotator 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
