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Anatomy of Global Flexion
40 Questions
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Anatomy of Global Flexion

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Questions and Answers

What is the result of the deltoids' action without the force of the supraspinatus?

  • External rotation of the shoulder
  • Impingement of the head with the acromion (correct)
  • Elevation of the arm
  • Stabilization of the scapula in ADD and GH extension

    • Which muscle is a major isometric moment of the shoulder?

  • Teres major
  • Latissimus dorsi (correct)
  • Rhomboids
  • Subscapularis

    • What is the function of the rhomboids during ADD and GH extension?

  • External rotation of the shoulder
  • Internal rotation of the shoulder
  • Stabilization of the scapula in ADD and GH extension (correct)
  • Elevation of the arm

    • Which muscle is an external rotator of the shoulder?

    <p>Infraspinatus</p> Signup and view all the answers

    What is the movement that occurs during internal rotation of the shoulder?

    <p>Head rolls and slides over the glenoid</p> Signup and view all the answers

    Which muscle is a synergist during external rotation of the shoulder?

    <p>Supraspinatus</p> Signup and view all the answers

    What is the result of the action of the muscles that move in ADD and EXTEND the shoulder?

    <p>Elevation of the arm</p> Signup and view all the answers

    Which muscle is an internal rotator of the shoulder?

    <p>Subscapularis</p> Signup and view all the answers

    What is the primary function of the scapulothoracic joint during shoulder flexion?

    <p>Upward rotation of the scapula</p> Signup and view all the answers

    What is the movement limit of the Coracohumeral Ligament during shoulder flexion?

    <p>Strain</p> Signup and view all the answers

    Which muscle is responsible for external rotation of the shoulder during the second stage of global abduction?

    <p>Supraspinatus</p> Signup and view all the answers

    What is the result of contralateral latissimus dorsi contraction during shoulder flexion?

    <p>Conralateral spinal muscle contraction</p> Signup and view all the answers

    What is the primary function of the rhomboids and middle trapezius during shoulder extension?

    <p>Scapular stabilization</p> Signup and view all the answers

    What is the range of motion for the first stage of global abduction?

    <p>0°-90°</p> Signup and view all the answers

    What is the result of bilateral spinal muscle contraction during shoulder flexion?

    <p>Lumbar lordosis</p> Signup and view all the answers

    What is the primary muscle responsible for global adduction?

    <p>Pectoralis major</p> Signup and view all the answers

    Which muscle is not involved in external rotation?

    <p>Serratus major</p> Signup and view all the answers

    What happens to the Coracohumeral Ligament during external rotation?

    <p>It tenses</p> Signup and view all the answers

    Which ligament relaxes during adduction?

    <p>Glenohumeral Ligament</p> Signup and view all the answers

    Which muscle is involved in scapular adduction?

    <p>Rhomboids</p> Signup and view all the answers

    What is the range of motion for internal rotation?

    <p>75º-85º</p> Signup and view all the answers

    Which muscle is involved in shoulder abduction?

    <p>Serratus major</p> Signup and view all the answers

    What is the maximum abduction angle in the plane of the scapula?

    <p>110º</p> Signup and view all the answers

    Which muscle is not involved in muscle elevation?

    <p>Rhomboids</p> Signup and view all the answers

    Which muscle is NOT an elevator of the scapula?

    <p>Pectoralis major</p> Signup and view all the answers

    Which of the following muscles is a protractor of the scapula?

    <p>Serratus major</p> Signup and view all the answers

    Which muscle has a dual role as both a synergist and antagonist in scapular movement?

    <p>All of the above</p> Signup and view all the answers

    What is the function of the latissimus dorsi muscle in scapular movement?

    <p>Depression of the scapula</p> Signup and view all the answers

    Which muscle is involved in external rotation of the shoulder?

    <p>Infraspinatus</p> Signup and view all the answers

    What is the function of the pectoral minor muscle in scapular movement?

    <p>Depression of the scapula</p> Signup and view all the answers

    Which muscle is NOT involved in upward rotation of the scapula?

    <p>Latissimus dorsi</p> Signup and view all the answers

    What is the primary function of the rhomboids and lower trapezius muscles in scapular movement?

    <p>Retraction of the scapula</p> Signup and view all the answers

    What is unique about the saddle joint?

    <p>Articular disc divides the cavity</p> Signup and view all the answers

    What is the range of motion for internal rotation in the glenohumeral joint?

    <p>75º-85º</p> Signup and view all the answers

    What is the result of posterior capsular tension in glenohumeral flexion?

    <p>Anterior translation</p> Signup and view all the answers

    What is the importance of supraspinatus action in abduction?

    <p>It prevents humeral compression</p> Signup and view all the answers

    What is the advantage of scapular plane abduction over frontal plane abduction?

    <p>Less structural compression</p> Signup and view all the answers

    What is the result of not having a gliding component during abduction?

    <p>Subacromial impingement</p> Signup and view all the answers

    What is the range of motion for external rotation in the glenohumeral joint?

    <p>60º-70º</p> Signup and view all the answers

    What is the fixed point in glenohumeral flexion?

    <p>Glenoid twist</p> Signup and view all the answers

    Study Notes

    Global Flexion

    • 3 stages: 0º-30º, 30º-120º, and 120º-180º
    • In the first stage, motor muscles involved are anterior deltoids, coracobrachialis, and clavicular pectoralis major
    • In the second stage, upward rotation of the scapula occurs, with ACj and SCCj participation, and motor muscles involved are serratus major, upper trapezius, and previous muscles
    • In the third stage, shoulder joint lock occurs, and spinal intervention begins

    Global Abduction

    • 3 stages: 0º-90º, 90º-150º, and 150º-180º
    • In the first stage, motor muscles involved are deltoids, especially the middle fasciculus and supraspinatus
    • In the second stage, upward rotation of the scapula occurs, with axial rotation AC and SCC, and motor muscles involved are serratus and upper trapezius
    • In the third stage, contralateral tilt of the spine occurs due to contraction of the spinal muscles of the opposite side

    Global Extension

    • 45º-55º
    • Involved muscles are scapulohumeral and scapulothoracic
    • Scapulohumeral motor muscles include post deltoid, teres major and minor
    • Scapulothoracic motor muscles include rhomboids, middle trapezius, and latissimus dorsi

    Global Adduction

    • 30º-45º
    • Motor muscles involved are GHj flex, arthrokinematics controllers, coaptation force, and without the force of the supraspinatus, the predominant action of the deltoids equals impingement of the head with the acromion

    Muscular Actions

    • Muscles of the scapulothoracic joint include rhomboids, stabilizing the scapula in ADD and GH extension, and all rotator cuff muscles being active during this movement
    • Muscles that elevate the arm include upper trapezius, levator scapulae, and rhomboids
    • Muscles that move in ADD and extend the shoulder include latissimus dorsi, sternocostal portion pectoralis major, teres major, triceps long head, posterior deltoid, infraspinatus, and teres minor
    • Muscles that internally and externally rotate the shoulder include subscapularis, anterior deltoid, pectoralis major, latissimus dorsi, teres minor, infraspinatus, and posterior deltoid

    Movement Limits

    • Coracohumeral ligament strain occurs
    • Ligaments involved include coracohumeral and glenohumeral
    • Coracohumeral ligament has lesser tubercle fasciculus extension, greater tubercle fasciculus flexion, and abduction relaxes and adduction tenses, external rotation tenses and internal rotation relaxes
    • Glenohumeral ligament has ABD tension in lower and middle fascicles, ADD relaxes superior fascicle, and external rotation tenses all three fascicles and internal rotation relaxes all

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    Related Documents

    Unit 5. Shoulder.pdf

    Description

    This quiz covers the different stages of global flexion, including the muscles involved and their limitations. It also explores the movement of the scapula and joints.

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