Podcast
Questions and Answers
What is considered the primary function of the scapulothoracic joint?
What is considered the primary function of the scapulothoracic joint?
Which of the following ligaments is NOT part of the glenohumeral joint complex?
Which of the following ligaments is NOT part of the glenohumeral joint complex?
What kind of joint is the scapulothoracic joint classified as?
What kind of joint is the scapulothoracic joint classified as?
How does the coracoacromial arch function in the shoulder joint?
How does the coracoacromial arch function in the shoulder joint?
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Which motion occurs in the sagittal plane at the shoulder joint?
Which motion occurs in the sagittal plane at the shoulder joint?
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What is the relationship known as that describes the movement of the ST joint and GH joint during arm elevation?
What is the relationship known as that describes the movement of the ST joint and GH joint during arm elevation?
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How much of the total shoulder elevation is contributed by the scapulothoracic joint during full motion?
How much of the total shoulder elevation is contributed by the scapulothoracic joint during full motion?
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What is the primary purpose of the glenoid labrum?
What is the primary purpose of the glenoid labrum?
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Which joint structure is located between the acromion process and the supraspinatus tendon?
Which joint structure is located between the acromion process and the supraspinatus tendon?
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At which vertebral level is the superior angle of the scapula located?
At which vertebral level is the superior angle of the scapula located?
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Which movement does not occur at the scapulothoracic joint?
Which movement does not occur at the scapulothoracic joint?
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Which of the following describes one of the axes of rotation for shoulder abduction?
Which of the following describes one of the axes of rotation for shoulder abduction?
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Which muscle group is primarily responsible for internal rotation of the shoulder?
Which muscle group is primarily responsible for internal rotation of the shoulder?
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During the upward rotation of the scapula, what motion occurs at the GH joint?
During the upward rotation of the scapula, what motion occurs at the GH joint?
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What is the relationship between the coracoacromial ligament and the acromion process?
What is the relationship between the coracoacromial ligament and the acromion process?
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What occurs when the scapulothoracic joint does not move during arm elevation?
What occurs when the scapulothoracic joint does not move during arm elevation?
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What is the ratio of movement at the GH joint compared to the ST joint during shoulder elevation?
What is the ratio of movement at the GH joint compared to the ST joint during shoulder elevation?
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Which of the following is an essential component of data collection skills in the examination of joint integrity?
Which of the following is an essential component of data collection skills in the examination of joint integrity?
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During which movement of the shoulder joint occurs at the transverse plane?
During which movement of the shoulder joint occurs at the transverse plane?
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Which of the following movements occurs around a vertical axis at the scapulothoracic joint?
Which of the following movements occurs around a vertical axis at the scapulothoracic joint?
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What is the function of the anterior sternoclavicular ligament?
What is the function of the anterior sternoclavicular ligament?
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Which ligament connects the first rib to the medial inferior clavicle?
Which ligament connects the first rib to the medial inferior clavicle?
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Which joint is described as the only osseous joint connecting the upper extremity to the axial skeleton?
Which joint is described as the only osseous joint connecting the upper extremity to the axial skeleton?
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What are the two parts of the coracoclavicular ligament?
What are the two parts of the coracoclavicular ligament?
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What movement is primarily associated with the acromioclavicular joint?
What movement is primarily associated with the acromioclavicular joint?
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What does the fibrocartilaginous disc do within the sternoclavicular and acromioclavicular joints?
What does the fibrocartilaginous disc do within the sternoclavicular and acromioclavicular joints?
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How is the full 180 degrees of shoulder elevation divided according to Neumann (2022)?
How is the full 180 degrees of shoulder elevation divided according to Neumann (2022)?
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What is a common injury associated with the acromioclavicular joint?
What is a common injury associated with the acromioclavicular joint?
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Which describes the role of the interclavicular ligament?
Which describes the role of the interclavicular ligament?
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What types of movements are associated with the sternoclavicular joint?
What types of movements are associated with the sternoclavicular joint?
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Study Notes
PTH 151 - Unit 5 Lab #1A - UE Joints
- Reference: Clinical Mechanics and Kinesiology Chapter 10 (pages 173-211), Muscle Manual (pages 188-225)
Shoulder Joint Complex
- Bones: Humerus, Scapula, Clavicle
Joints
-
Glenohumeral Joint (GHJ): Also known as the shoulder joint
- Articulating Surfaces: Proximal - glenoid fossa of scapula; Distal - humeral head
-
Ligaments:
- Superior Glenohumeral Ligament: Thickening of anterior joint capsule
- Middle Glenohumeral Ligament: Thickening of anterior joint capsule
- Inferior Glenohumeral Ligament: Thickening of anterior and inferior joint capsule
- Coracohumeral Ligament: Runs between coracoid process and greater tubercle; prevents anterior and inferior subluxation of humeral head
Scapulothoracic Joint (ST Joint)
- Articulating Surfaces: Anterior aspect of scapula, posterior aspect of rib cage
- Ligaments: None
- Motions: Elevation/Depression, upward and downward rotation, anterior/posterior tipping, IR/ER, adduction/abduction (protraction/retraction)
- Miscellaneous: Considered a pseudo-joint; ST motion occurs simultaneously with AC or SC joint motion; relationship between ST and GH motion known as scapulohumeral rhythm (for every 2 degrees of GH abduction/flexion, 1 degree of upward rotation occurs at ST joint)
Sternoclavicular Joint (SC Joint)
- Articulating Surfaces: Proximal (medial) - manubrium of sternum; Distal (lateral) - medial end of clavicle
- Ligaments: Anterior sternoclavicular ligament, posterior sternoclavicular ligament, interclavicular ligament, costoclavicular ligament
- Motions: Elevation/Depression, posterior/anterior rotation, protraction/retraction
- Miscellaneous: The only osseous joint that connects the UE to the axial skeleton; fibrocartilaginous disc within the joint improves joint congruence
Acromioclavicular Joint (AC Joint)
- Articulating Surfaces: Proximal (medial) - lateral end of clavicle; Distal (lateral) - acromion process of scapula
- Ligaments: Acromioclavicular ligament, coracoclavicular ligament (trapezoid and conoid)
- Motions: Scapular IR/ER, posterior/anterior tipping, upward/downward rotation
- Miscellaneous: Fibrocartilaginous disc often present to improve joint congruence; common site for separation injuries
SC & AC Joint Contributions to Scapulohumeral Rhythm
- Neumann (2022) divides shoulder elevation into early and late phases (each 90 degrees)
- Early phase: 60 degrees from humerus, 30 degrees from scapular rotation
- Late phase: 60 degrees from humerus, 30 degrees from scapular rotation; additional 20-25 degrees at the AC joint
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Description
Test your knowledge on the anatomy and mechanics of the shoulder joint complex. This quiz covers the bones, articulating surfaces, ligaments, and joints associated with the shoulder. Perfect for students in Clinical Mechanics and Kinesiology.
