Glenohumeral Joint Abduction
10 Questions
2 Views

Glenohumeral Joint Abduction

Created by
@BestExtraterrestrial

Podcast Beta

Play an AI-generated podcast conversation about this lesson

Questions and Answers

The abductors of the genohumeral joint are:

Supraspinatous, deltoid (all fibres)

Flexors of the glenohumeral joint are:

Deltoid (anterior fibres), pectoralis major, coracobrachialis, biceps brachii

Internal rotators of the glenohumeral joint are:

Subscapularis, teres major, pectoralis major, latissimus dorsi

Adductors of the glenohumeral joint are:

<p>Pectoralis major, latissimus dorsi, coracobrachialis, (teres major, subscapularis)</p> Signup and view all the answers

Extensors of the glenohumeral joint are:

<p>Latissimus dorsi, deltoid (posterior fibres), triceps brachii</p> Signup and view all the answers

External rotators of the glenohumeral joint are:

<p>Infraspinatous, teres major</p> Signup and view all the answers

Elevators of the scapula are:

<p>trapezius (superior fibres), levator scapulae</p> Signup and view all the answers

Depressors of the scapula are:

<p>trapezius (inferior fibres)</p> Signup and view all the answers

Protractors of the scapula are:

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

Retraction and medial rotation of the scapula are:

<p>Levator scapulae, rhomboid major, rhomboid minor, trapezius (middle fibres)</p> Signup and view all the answers

Study Notes

Glenohumeral Joint Abduction

Definition

  • Glenohumeral joint abduction: the movement of the humerus (upper arm bone) away from the midline of the body in the frontal plane, resulting in the arm moving outward and upward.

Muscles Involved

  • Primary movers:
    • Deltoid muscle (anterior and middle fibers)
    • Supraspinatus muscle
  • Secondary movers:
    • Trapezius muscle
    • Serratus anterior muscle

Range of Motion

  • Normal range of motion: 0-180° ( arm at side to arm fully abducted)
  • Average range of motion: 150-160°

Movement Pattern

  • Initial phase (0-30°): scapula rotates downward and upward, humerus abducted by supraspinatus and deltoid muscles
  • Middle phase (30-90°): scapula rotates upward and outward, humerus abducted by deltoid and trapezius muscles
  • Late phase (90-180°): scapula rotates upward and outward, humerus abducted by deltoid and serratus anterior muscles

Importance

  • Essential for many daily activities, such as:
    • Reaching for objects
    • Throwing
    • Lifting
    • Carrying
  • Abnormalities in glenohumeral joint abduction can lead to:
    • Shoulder impingement
    • Rotator cuff injuries
    • Scapular winging

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

Test your knowledge of the glenohumeral joint abduction, including the muscles involved, range of motion, and movement patterns. Learn about the importance of this movement in daily activities and how abnormalities can lead to injuries.

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser