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Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton. Jessica Radke -Snead, RD, MS Bio 241 Anatomy and Physiology. Making Sense of the Muscles. Description  Location  Function Use muscle origins and insertions to describe where the muscle is located AND what it does

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Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

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  1. Unit 3: The Muscular SystemLab 2: Muscles of the Appendicular Skeleton Jessica Radke-Snead, RD, MS Bio 241 Anatomy and Physiology

  2. Making Sense of the Muscles • Description  Location  Function • Use muscle origins and insertions to describe where the muscle is located AND what it does • Origin: attachment of a muscle tendon to the stationary bone • Insertion: attachment of the other muscle tendon to the moving bone • Action: the movement that occurs at the joint due to the muscle contraction

  3. Practice Muscle: Pectoralis Major Origin: Clavicle, sternum and ribs Insertion: Greater tubercle and intertubercular sulcus/groove of humerus Function: • Adducts and medially rotates arm at shoulder joint (try this yourself!) • Clavicular head flexes arm • Sternocostal head extends arm

  4. Muscles: Upper Extremity • Movement of • Shoulder and arm • Forearm and hand • Origin/insertion requirement • Shoulder and arm: ALL • Forearm and hand: All BUT flexor carpi radialis, extensor carpi radialislongus, flexor carpi ulnaris, extensor carpi ulnaris • Cadaver • Shoulder and arm: All BUT levator scapulae, subscapularis and subclavius • Forearm and hand: ALL

  5. Muscles: Upper Extremity

  6. Muscles: Upper Extremity

  7. Muscles: Upper Extremity

  8. Muscles: Upper Extremity

  9. Practice Muscle: Rectus femoris Origin: Iliac spine Insertion: Patella and tibial tuberosity Function: • Extension at knee • Flexion at hip

  10. Muscles: Lower Extremity • Movement of • Femur • Leg and thigh • Leg and foot • Origin/insertion requirement • Femur: All BUT gluteus minimus, piriformisand illiopsoas • Leg and thigh: ALL • Leg and foot: ALL • Cadaver requirement • Femur: All BUT illiopsoas • Leg and thigh: All BUT sartorius • Leg and foot: All BUT tibialis posterior

  11. Muscles: Lower Extremity

  12. Muscles: Lower Extremity

  13. Lab Objectives • Return exam 2—review your exam and the keys • Please see me if you need assistance with course material • Today: Ensure that you are able to identify each muscle defined in your lab guide, including indicated origins and insertions, on all lab models/diagrams • Break into 3-4 Cadaver Groups • BEFORE: Review the Lab 2 muscles designated with a (C) • DURING: Please wear a provided lab coat and work efficiently so as to respect all student’s time spent with the cadavers

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