AP1 lab-Upper Appendicular Skeleton

Upper Appendicular Skeleton

  • Overview of the upper appendicular skeleton and its components.

Pectoral Girdle

  • Composed of two main bones:

    • Scapula (Shoulder Blade)

    • Clavicle (Collarbone)

  • Both contribute to shoulder mobility and stability.

  • Front View:

    • Diagram showcasing the pectoral girdle with identified components.

    • Public domain image credit to LadyofHats Mariana Ruiz Villarreal.

Scapula Details

  • Scapula Posterior View:

    • Detailed illustration showing the structure and features of the scapula from the back.

    • Provides insight into areas such as the spine of the scapula and glenoid cavity.

  • Anterior View:

    • Includes an overview of the scapula from the front, highlighting different anatomical structures and their functions.

    • Public domain images by Anatomography and LadyofHats Mariana Ruiz Villarreal.

Testing Knowledge

  • Self-testing section includes questions or prompts based on the pectoral girdle and scapula.

  • Encourages retention of anatomical knowledge of the structures involved.

Clavicle Anatomical Features

  • Clavicle: Holds the shoulder steady while providing a point of attachment.

  • Important features include:

    • Coracoclavicular Ligament: Connects the clavicle to the scapula.

    • Acromioclavicular Joint: Connects the clavicle with the acromion of the scapula.

    • Glenohumeral Joint: Articulates the humerus with the scapula for shoulder movement.

  • Different views displayed:

    • Anterior, Posterior, and Superior views to assist in visualizing orientations.

Humerus Characteristics

  • Humerus: The long bone of the upper arm.

    • Key features include:

      • Greater and Lesser Tubercle: Sites for muscle attachment.

      • Anatomical Neck: Marks the region where the head meets the shaft.

      • Intertubercular Groove: Passage for tendon attachment.

      • Surgical Neck: Common site for fractures.

      • Capitulum and Trochlea: Articulate with the radius and ulna, respectively.

  • Illustrations with anterior and posterior views highlight these features.

Ulna and Radius

  • Ulna and Radius: Forearm bones allowing for rotation and movement of the wrist.

    • Key highlights include:

      • Olecranon Process: Forms the elbow joint.

      • Trochlear Notch: Articulates with the humerus.

      • Radial Notch: For the radius’s articulation.

      • Interosseous Membrane: Connects ulna and radius providing stability.

      • Styloid Processes: Projections at the wrist joint assisting in stability.

Carpal and Hand Bones

  • Carpals: 8 bones in the wrist (e.g., Scaphoid, Lunate).

  • Metacarpals: 5 bones forming the hand's structure.

  • Phalanges: 14 bones in the fingers; includes proximal, middle, and distal segments.

  • Visual aids assist in understanding the anatomical layout:

    • Anterior and posterior views show the arrangement of these bones and their interconnections.

Testing Knowledge of the Hand

  • Self-testing section helps consolidate knowledge on hand anatomy.

  • Palmar view focus encourages recognition of bone structure in practical settings.