1 / 13

Selected Joints & Muscular System I: Architecture

Selected Joints & Muscular System I: Architecture. Lecture 9. Shoulder Joint. Fig. 9.15. Ligaments of the Shoulder Joint Glenohumeral (3) Transverse humeral Coracohumeral Coracoacromial Coracoclavicular . Muscles of Shoulder Joint Rotator cuff (4 muscles). Knee Joint.

olwen
Download Presentation

Selected Joints & Muscular System I: Architecture

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Selected Joints &Muscular System I:Architecture Lecture 9

  2. Shoulder Joint Fig. 9.15 • Ligaments of the Shoulder Joint • Glenohumeral (3) • Transverse humeral • Coracohumeral • Coracoacromial • Coracoclavicular • Muscles of Shoulder Joint • Rotator cuff (4 muscles)

  3. Knee Joint • Menisci: Fibrocartilage articular disks • Cruciate ligaments: Anterior cruciate ligament and posterior cruciate ligament • Collateral ligaments: Fibular and tibial Fig. 9.19

  4. Knee Injuries and Disorders • Football injuries • Damage to collateral ligaments due to blow • Torn menisci • Torn cruciate ligaments Figure from Clinical View on page 278

  5. Properties of Muscle • Contractility • Ability of a muscle to shorten with force • Excitability • Capacity of muscle to respond to a stimulus • Extensibility • Muscle can be stretched to its normal resting length and beyond to a limited degree • Elasticity • Ability of muscle to recoil to original resting length after stretched

  6. General Principles of Muscles • Tendons: Attach muscles to bones • Aponeurosis: A very broad tendon • Muscles • Origin or head: Muscle end attached to more stationary of two bones • Insertion: Muscle end attached to bone with greatest movement • Belly: Largest portion of the muscle between origin and insertion • Synergists: Muscles that work together to cause a movement • Prime mover: Plays major role in accomplishing movement • Agonist: Muscle causing an action when contracts • Antagonist: A muscle working in opposition to agonist • Fixators: Stabilize joint/s crossed by the prime mover

  7. Muscle Shapes Table 10.5

  8. Muscle Shapes Table 10.5

  9. Nomenclature Fig. 10.14

  10. Nomenclature • Example - extensor carpi radialis longus Fig. 10.14

  11. Review Question The muscle name transversus thoracis is derived from a combination of its • Size and function • Orientation and location • Relative length and location • Shape and orientation • Function and shape

  12. Points to Remember • Skeletal muscles have many shapes and in each instance contraction of the muscle tissue causes body movements through their attachments to the skeleton or beneath the skin. • Understanding the meaning of the parts of a muscle name helps one to learn the muscle.

  13. Questions?

More Related