1. Jessica Radke-Snead, RD, MS Bio 241 Anatomy and Physiology
Unit 3: The Muscular System Lab 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 radialis longus, 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, 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

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