Clinical Science and Practice 2025

Bone Identification:
- Name and locate the bones and bony prominences of the upper limb and their trunk attachments.
Joint Assessment:
- Identify the type of joints and the associated movements.
- Recognize muscles responsible for each joint movement.
Tendon Rupture Assessment:
- Distinguish between ruptures of the flexor digitorum superficialis and profundus tendons.
Common Upper Limb Injuries:
- Recognize various common injuries.

Role:
- Acts as a multi-jointed lever, enabling extensive movement at the shoulder joint.
- Stability is traded off for a broader range of motion, allowing the hand to reach high for activities like climbing.
Muscle Distribution:
- Large proximal muscles for heavy lifting; small distal muscles for fine motor skills (e.g., writing).
Sensory Feedback:
- The skin and joints provide sensory input to enhance skillful movements, like gripping a cup without crushing it.

Case 1: Rugby player with shoulder dislocation.
- Discuss rotator cuff muscles and arm position during impact.
Case 2: 75-year-old woman with wrist pain from a fall (Colles fracture).
Case 3: 26-year-old male with wrist injury from hockey (anatomical snuffbox examination).
Case 4: 35-year-old metal worker with a wrist laceration.
Case 5: 46-year-old plumber with a thumb laceration needing further treatment.
Case 6: 24-year-old man with primary finger injuries requiring structure and function assessment.

Rotator Cuff Muscles:
- Supraspinatus, Infraspinatus, Teres Minor, Subscapularis
- Maintain humeral head positioning but may not prevent dislocation in certain arm positions.
Flexor Muscles:
- Cross the wrist joint, aiding in wrist and finger flexion—damage assessment crucial in lacerations.

Colles Fracture:
- Dorsal displacement upon falling on outstretched hands.
Shoulder X-Ray Analysis:
- Distinguish normal anatomy from dislocated findings.

AVN (Avascular Necrosis) in Scaphoid Fractures:
- Risk of compromised blood supply leading to potential bone death if not properly managed.

Lacerations and tendon injuries require careful evaluation of circulation, sensation, and movement.
Understanding anatomy and function is critical to assessing and managing upper limb injuries effectively.

Bone Identification:
- Name and locate the bones (e.g., humerus, radius, ulna, carpals) and bony prominences (e.g., medial and lateral epicondyles, greater tubercle) of the upper limb and their trunk attachments, including ligaments and muscles that stabilize these areas.
Joint Assessment:
- Identify the types of joints (e.g., synovial, hinge, ball-and-socket) and the associated movements (flexion, extension, abduction, adduction, rotation) that occur at these joints.
- Recognize key muscles responsible for each joint movement, emphasizing their origins and insertions to understand muscle actions better.
Tendon Rupture Assessment:
- Distinguish between ruptures of the flexor digitorum superficialis and profundus tendons, recognizing clinical signs presented with each type of rupture, and their implications for hand function.
Common Upper Limb Injuries:
- Recognize various common injuries (e.g., fractures, dislocations, tendon tears) along with their mechanisms of injury, prevention strategies, and rehabilitation approaches.

Role:
- Acts as a multi-jointed lever, enabling extensive movement at the shoulder joint and facilitating daily activities that require reaching overhead.
- The design of the upper limb involves a trade-off where stability is sacrificed for a broader range of motion, allowing for complex movements necessary in activities like climbing, throwing, or lifting.
Muscle Distribution:
- Large proximal muscles (e.g., deltoids, pectorals) are adapted for heavy lifting tasks such as lifting and carrying, while smaller distal muscles facilitate fine motor skills necessary for tasks like writing, typing, or manipulating small objects.
Sensory Feedback:
- The skin and joints provide essential sensory input that enhances skillful movements, such as gripping a cup firmly without breaking it. Proprioception aids in coordination and balance, critical for upper limb functionality.

Case 1: Rugby player with shoulder dislocation.
- Discuss the role of the rotator cuff muscles in stability and arm position during impact, as well as rehabilitation protocols post-injury.
Case 2: 75-year-old woman with wrist pain from a fall leading to a Colles fracture.
- Discuss common outcomes in the elderly and the importance of osteoporosis management.
Case 3: 26-year-old male with wrist injury from hockey (anatomical snuffbox examination) to assess for scaphoid fractures, focusing on anatomical locations of tenderness.
Case 4: 35-year-old metal worker with a wrist laceration; examine nerve and tendon damage associated with such injuries.
Case 5: 46-year-old plumber with a thumb laceration needing further treatment; explore the significance of the thumb in hand function and implications of injuries to its tendons.
Case 6: 24-year-old man with primary finger injuries requiring structure and function assessment; evaluate interventions to restore fine motor skills post-injury.

Rotator Cuff Muscles:
- Comprises Supraspinatus, Infraspinatus, Teres Minor, and Subscapularis.
- Maintain humeral head positioning in the glenoid cavity but may not prevent dislocation in certain arm positions.
Flexor Muscles:
- Cross the wrist joint, aiding in wrist and finger flexion; understanding damage assessment is crucial in cases of lacerations to prevent long-term disability.

Colles Fracture:
- Characterized by dorsal displacement upon falling on outstretched hands; commonly occurs in older adults with brittle bones.
Shoulder X-Ray Analysis:
- Distinguish normal anatomy from dislocated findings; recognize signs of rotator cuff injuries using imaging techniques.

AVN (Avascular Necrosis) in Scaphoid Fractures:
- Increased risk of compromised blood supply leading to potential bone death if treated ineffectively; highlight importance of immediate medical intervention for appropriate management.

Lacerations and tendon injuries require careful evaluation of circulation, sensation, and movement to ascertain the extent of damage and appropriate healing protocols.
Understanding anatomy and function is critical to assessing and managing upper limb injuries effectively, enabling better recovery outcomes and prevention of further complications.