unit 3: the muscular system lab 2: muscles of the appendicular skeleton

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

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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 - PowerPoint PPT Presentation

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Page 1: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Unit 3: The Muscular SystemLab 2: Muscles of the Appendicular Skeleton

Jessica Radke-Snead, RD, MSBio 241 Anatomy and Physiology

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

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

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

Practice

Muscle: Pectoralis MajorOrigin: Clavicle, sternum and ribsInsertion: Greater tubercle and intertubercular sulcus/groove of humerusFunction: 1. Adducts and medially rotates arm at shoulder

joint (try this yourself!)2. Clavicular head flexes arm3. Sternocostal head extends arm

Page 4: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

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

radialis longus, flexor carpi ulnaris, extensor carpi ulnaris• Cadaver

– Shoulder and arm: All BUT levator scapulae, subscapularis and subclavius

– Forearm and hand: ALL

Page 5: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Upper Extremity

Page 6: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Upper Extremity

Page 7: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Upper Extremity

Page 8: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Upper Extremity

Page 9: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Practice

Muscle: Rectus femorisOrigin: Iliac spineInsertion: Patella and tibial tuberosity

Function: 1. Extension at knee2. Flexion at hip

Page 10: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Lower Extremity• Movement of

– Femur– Leg and thigh– Leg and foot

• Origin/insertion requirement– Femur: All BUT gluteus minimus, piriformis and 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

Page 11: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Lower Extremity

Page 12: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

Muscles: Lower Extremity

Page 13: Unit 3: The Muscular System Lab 2: Muscles of the Appendicular Skeleton

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