Anatomy of the Scapula and Humerus
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Questions and Answers

What is the largest bone of the upper extremity?

  • Scapula
  • Radius
  • Humerus (correct)
  • Ulna

The humerus consists of two ridges: the lateral and medial supracondylar ridge.

True (A)

Name the three sections of the humerus.

Upper end, shaft, lower end

The ______ notch is one of the three notches in the scapula.

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

Match the following parts of the scapula with their categories:

<p>Scapular notch = Notches Infraglenoid tubercle = Tubercles Spine glenoid notch = Notches Supra glenoid tubercle = Tubercles</p> Signup and view all the answers

Which of the following is NOT a surface of the humeral shaft?

<p>Lateral surface (C)</p> Signup and view all the answers

The carrying angle of the elbow typically measures between 160° and 165°.

<p>False (B)</p> Signup and view all the answers

Name one fossa present at the lower end of the humerus.

<p>Olecranon fossa</p> Signup and view all the answers

The _______ is a structure that is important for elbow flexion and is located at the lower end of the humerus.

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

Match the following anatomical structures with their descriptions:

<p>Capitulum = Articulates with the radius Trochlea = Articulates with the ulna Medial epicondyle = Site for muscle attachment on the medial side Lateral epicondyle = Site for muscle attachment on the lateral side</p> Signup and view all the answers

Flashcards

Humeral Shaft Surfaces

The humeral shaft has three surfaces: anterior medial, anterolateral, and posterior.

Coronoid Fossa

A depression on the humerus that accommodates the coronoid process of the ulna.

Radial Fossa

A depression on the humerus that receives the head of the radius.

Olecranon Fossa

A deep depression on the posterior humerus that accommodates the olecranon process of the ulna during elbow extension.

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Capitulum

A rounded articular surface of the humerus that articulates with the radius.

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Trochlea

A spool-like articular surface of the humerus that articulates with the ulna.

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Medial Epicondyle

A bony projection located on the medial (inside) aspect of the distal humerus.

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Lateral Epicondyle

A bony projection located on the lateral (outside) aspect of the distal humerus.

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Spiral Groove (Humerus)

A groove on the posterior surface of the humerus that houses the radial nerve.

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Surgical Neck

A constricted area of the humerus just distal to the greater tubercle.

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Elbow Fixed

The elbow position where it does not move.

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Carrying Angle

The angle of the forearm in relation to the upper arm.

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Humerus

The longest and largest bone in the upper arm.

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Upper End of Humerus

The top part of the humerus, containing head, neck, and tuberosities.

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Head (Humerus)

Rounded top part of the humerus.

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Anatomical Neck

Narrow region directly below the head of the humerus.

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Greater Tuberosity

Large bump on the humerus' lateral side.

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Lesser Tuberosity

Smaller bump on the humerus' medial side.

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Intertubercular Groove

Groove between the greater and lesser tubercles.

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Surgical Neck

Narrow area just below the tubercles, prone to fracture.

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Lateral Supracondylar Ridge

A ridge on the lateral side of the distal humerus.

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Medial Supracondylar Ridge

A ridge on the medial side of the distal humerus.

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Scapula

Shoulder blade bone.

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Scapular Notch

Indent in the superior border of the scapula.

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Spine (Scapula)

Ridge that runs across the scapula.

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Glenoid Notch

Indent in the scapula where the humerus attaches.

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Notch for Circumflex Scapular Artery

A notch on the inferior scapula, allowing a blood vessel to pass through.

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Infraglenoid Tubercle

A bump on the scapula, below the glenoid cavity.

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Supra Glenoid Tubercle

A bump on the scapula, above the glenoid cavity.

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Study Notes

Scapula

  • 3 notches
    • Suprascapular notch
    • Spina glenoid notch
    • Notch for circumflex scapular artery
  • 3 tubercles
    • Tubercle of the infraglenoid
    • Supra glenoid tubercle

Glenoid Cavity

  • Humerus
    • Is the longest and largest bone of the upper extremity
    • The humerus is the skeleton of the arm
  • The humerus is divided into upper end, shaft, lower end
    • The upper end of the humerus consists of:
      • Head
      • Anatomical neck
      • Greater tuberosity
      • Lesser tuberosity
      • Intertubercular groove
      • Surgical neck
      • Humeral shaft
  • The humerus has 3 borders
  • The humerus has 2 ridges (lateral supracondylar ridge, medial supracondylar ridge)

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Description

This quiz covers the fundamental anatomy of the scapula and humerus. It includes details about notches, tubercles, and the structure of the humerus. Perfect for students studying human anatomy!

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