Shoulder joint overview

• What type of joint is the shoulder joint?

  Ball-and-socket joint
• What is the clavicle commonly known as?

  Collarbone
• What bones form the shoulder joint?

  Humerus and scapula
• Why is the shoulder joint considered the most mobile joint in the body?

  It allows a very wide range of movement
• What are the key features of the shoulder joint's bones?

  • Clavicle: Anchored to sternum at sternoclavicular joint
  • Scapula: Forms socket for humerus
  • Humerus: Ball-shaped head fits into scapula's socket
• How can the shoulder joint's movement be compared to a golf ball on a tee?

  The ball can move freely in many directions
• What does the scapula form in the shoulder joint?

  It forms the socket for the humerus
• What is the name of the ligament labeled as "Coracoacromial ligament" in the image?

  Coracoacromial ligament
• What are the three main bones involved in the shoulder joint?

  Clavicle, scapula, and humerus
• What ligaments are involved in the shoulder joint and their functions?

  • Glenohumeral ligaments: Stabilize humerus in scapula socket
  • Coracohumeral ligament: Supports upper arm when lifting
  • Coracoacromial ligament: Forms protective arch over shoulder top
• What is the name of the ligaments labeled as "Glenhumeral ligaments" in the image?

  Glenhumeral ligaments
• What is the name of the ligament labeled as "Corachumeral ligament" in the image?

  Corachumeral ligament
• What connects the clavicle to the scapula's acromion process?

  The acromioclavicular joint
• How does the structure of the shoulder joint facilitate movement?

  • Ball-and-socket design
  • Humerus fits into scapula
  • Allows movement in many directions
• What is the name of the structure labeled as "deltoid branch of thoracoacromial artery"?

  Deltoid branch of thoracoacromial artery
• How do the ligaments contribute to shoulder stability?

  They wrap around the humerus and shoulder blade
• What are the key anatomical structures labeled in the image?

  • Clavicle
  • Sternum
  • 6th costal cartilage
  • Anterior layer of rectus sheath
  • External oblique muscle
• What does the coracohumeral ligament do?

  Supports the upper arm when lifting
• What does the image illustrate about the shoulder ligaments?

  They form a stabilizing support system
• What is the role of the clavicle in the shoulder joint?

  Anchored to the sternum at the joint
• What is the name of the muscle labeled as "deltopectoral triangle"?

  Deltopectoral triangle
• What is the main function of shoulder muscles?

  To move the arm in various directions
• What is the name of the muscle labeled as "clavicular head of pectoralis major muscle"?

  Clavicular head of pectoralis major muscle
• What is the name of the structure labeled as "acromion"?

  Acromion
• What is the name of the muscle labeled as "abdominal head of pectoralis major muscle"?

  Abdominal head of pectoralis major muscle
• What is the name of the muscle labeled as "trapezius muscle"?

  Trapezius muscle
• What are the attachment points for the biceps?

  Scapula, humerus
• What is the function of the glenohumeral ligaments?

  Stabilize the humerus in the scapula socket
• What are the main muscles labeled in the image?

  • Trapezius muscle
  • Deltopectoral triangle
  • Deltoid muscle
  • Pectoralis major muscle (clavicular head and sternocostal head)
  • Sternocleidomastoid muscle
  • Latissimus dorsi muscle
  • Serratus anterior muscle
• What are the attachment points for the triceps?

  Scapula, humerus
• What are the main muscle groups surrounding the shoulder joint and their actions?

  • Deltoids: Abduction (lift sideways)
  • Biceps: Elbow flexion, forearm rotation
  • Triceps: Elbow extension
  • Pectorals: Shoulder adduction, chest support
• What are the attachment points for the deltoids?

  Clavicle, scapula, humerus
• What is the role of the coracoacromial ligament?

  Forms protective arch over shoulder top
• What are the main ligaments shown in the image and what are their functions?

  • Coracoacromial ligament: Connects the coracoid process to the acromion, forming the coracoacromial arch to protect the shoulder joint.
  • Corachumeral ligament: Connects the coracoid process to the humerus, stabilizing the shoulder joint.
  • Glenhumeral ligaments: Stabilize the glenohumeral (shoulder) joint.
• What is the name of the muscle labeled as "sternocostal head of pectoralis major muscle"?

  Sternocostal head of pectoralis major muscle
• What role do the trapezius muscles play in shoulder movement?

  They help stabilize the shoulder blades
• What is the main action of the triceps?

  Elbow extension
• How does the latissimus dorsi contribute to shoulder movement?

  It contributes to backward movements
• Where do the deltoids attach?

  Clavicle, scapula, and humerus
• What is the main action of the biceps?

  Elbow flexion, forearm rotation