A&P 1 md 5 slides .pdf - Module 05 Skeletal Muscles &...

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Module 05SkeletalMuscles & JointsSkeletal MusclesJoint ClassificationSynovial Joints
Skeletal MusclesAnatomy and Physiology I
Objectives10/3/20213Define the functions of agonist (prime movers),synergists, and antagonistsDefine the terms- origin, insertion and belly inregards to musclesDescribe how a muscle’s fascicle direction andposition relative to a joint affects its actionIdentify and label the major muscles
Skeletal Muscles:Actions and TermsTendons- connect skeletal muscle to a boneOrigin of MuscleAttached to a fixed or immovable boneMore proximal attachmentInsertion of MuscleAttached to a moveable boneMore distal attachmentBelly- refers to the thick middle section of the muscle10/3/20214
Skeletal Muscles:ExampleBiceps Brachii10/3/20215OriginInsertionBelly
Skeletal Muscles:Actions and TermsAgonist (prime mover)Muscle that has the major responsibility for producing aspecific movementAntagonistMuscles that oppose, or reverse, a particular movementSynergistsHelp prime movers with movementAction- the movement that the muscle creates whencontracted10/3/20216
Skeletal Muscles:ExampleAgonist (prime mover): Biceps BrachiiAntagonist: Triceps Brachii(not pictured)Synergists: BrachialisAction: Elbow flexion10/3/20217
Naming Muscles and FasciclesNaming of the skeletal muscles can be based off anumber of factors:Location, shape, size, origins, action, direction of musclefibersArrangement and direction of fascicles can helpdetermine movement producedCircular, parallel, pennate, fusiform10/3/20218
10/3/20219
Muscular System-Anterior View10/3/202110
Muscular System- Posterior View10/3/202111
Facial Muscles10/3/202112
Anterior Neck Muscles10/3/202113
Deep Back Muscles10/3/202114
Intercostal Muscles10/3/202115
Abdominal Muscles10/3/202116
Shoulder Muscles10/3/202117
Arm Muscles10/3/202118
Superficial Forearm Muscles10/3/202119
Deep Forearm Muscles10/3/202120

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Term
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Tags
Synovial joint, lower leg muscles

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