Podcast
Questions and Answers
Which muscle is NOT located in the pectoral region?
Which muscle is NOT located in the pectoral region?
- Pectoralis major
- Brachialis (correct)
- Latissimus dorsi
- Coracobrachialis
Which of the following muscles assists in the movement of the shoulder joint?
Which of the following muscles assists in the movement of the shoulder joint?
- Anconeus
- Extensor carpi radialis longus
- Pronator teres
- Teres minor (correct)
What structure serves as a common origin for the elbow joint flexors?
What structure serves as a common origin for the elbow joint flexors?
- Spiral groove
- Common extensor origin
- Common flexor origin (correct)
- Capsular ligament of elbow joint
Which muscle is primarily located on the anterior aspect of the humerus?
Which muscle is primarily located on the anterior aspect of the humerus?
The capsular ligament of the shoulder joint primarily supports which of the following muscles?
The capsular ligament of the shoulder joint primarily supports which of the following muscles?
Which muscle extends the elbow joint by acting on the humerus?
Which muscle extends the elbow joint by acting on the humerus?
Which of the following muscles is a part of the rotator cuff?
Which of the following muscles is a part of the rotator cuff?
Which muscle is primarily responsible for adduction of the arm?
Which muscle is primarily responsible for adduction of the arm?
What is the primary role of the coracohumeral ligament?
What is the primary role of the coracohumeral ligament?
Which feature is NOT present at the upper end of the humerus?
Which feature is NOT present at the upper end of the humerus?
Where is the trapezoid part of the coracoclavicular ligament attached?
Where is the trapezoid part of the coracoclavicular ligament attached?
How many ossification centers are responsible for the development of the scapula?
How many ossification centers are responsible for the development of the scapula?
Which part of the humerus articulates with the glenoid cavity of the scapula?
Which part of the humerus articulates with the glenoid cavity of the scapula?
Which of the following represents an atavistic epiphysis in humans?
Which of the following represents an atavistic epiphysis in humans?
What is the first secondary ossification center to appear in the coracoid process?
What is the first secondary ossification center to appear in the coracoid process?
What is the function of the intertubercular sulcus?
What is the function of the intertubercular sulcus?
Which of the following accurately describes the location of the scapula?
Which of the following accurately describes the location of the scapula?
Which surface of the scapula provides attachment for the subscapularis muscle?
Which surface of the scapula provides attachment for the subscapularis muscle?
What is the function of the three longitudinal ridges on the scapula?
What is the function of the three longitudinal ridges on the scapula?
Which of the following features is NOT associated with the body of the scapula?
Which of the following features is NOT associated with the body of the scapula?
What distinguishes the dorsal surface of the scapula?
What distinguishes the dorsal surface of the scapula?
Which angle is NOT part of the three angles of the scapula?
Which angle is NOT part of the three angles of the scapula?
Which muscle is inserted along the medial border and inferior angle of the scapula?
Which muscle is inserted along the medial border and inferior angle of the scapula?
What is the function of the spinoglenoid notch in the scapula?
What is the function of the spinoglenoid notch in the scapula?
Flashcards are hidden until you start studying
Study Notes
Humerus and Scapula Anatomy
- The humerus is a long bone consisting of the upper end, shaft, and lower end.
- Upper end features: head, neck, greater tubercle, lesser tubercle, and intertubercular sulcus; the head articulates with the scapula's glenoid cavity forming the shoulder joint.
- Lower end features: capitulum (lateral), trochlea (medial), radial fossa, coronoid fossa, medial and lateral epicondyles.
Muscle and Ligament Attachments
- Major muscles attached to the humerus: supraspinatus, infraspinatus, subscapularis, teres minor, pectoralis major, latissimus dorsi, deltoid, triceps (lateral and medial heads).
- Ligaments associated with the shoulder and elbow: coracohumeral ligament, capsular ligaments of the shoulder and elbow joints.
Scapula Features
- The scapula, also known as the shoulder blade, is a large triangular bone positioned against the 2nd to 7th ribs.
- Divided into body (triangular, thin, and transparent) and three processes: spinous, acromion, and coracoid.
- Costal surface (subscapular fossa) is concave and directed medially, providing attachment for the subscapularis muscle.
Scapula Surfaces and Muscles
- Dorsal surface is convex, featuring the spinous process dividing it into supraspinous and infraspinous fossae.
- The upper part of the dorsal surface, supraspinous fossa, is smaller than the larger infraspinous fossa.
- The medial border and inferior angle serve as insertion points for the serratus anterior muscle.
Ossification Patterns
- Scapula ossification is divided into one primary (body) and seven secondary centers.
- Secondary ossification includes centers in the coracoid process, acromion process, and various parts of the glenoid cavity; primary and first secondary centers appear in fetal life and infancy.
Important Anatomical Notions
- The coracoid process can be palpated approximately 2.5 cm below the lateral junction of the clavicle.
- The upper end of the scapula includes the head which is rounded, articulating to form the glenohumeral joint.
- The scapula's high mobility allows for a wide range of shoulder movements.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
