Covers the boundaries and subdivision of the elbow region into anterior and posterior parts, then the anterior region's external surface with its three elevations and sulci, the layers from skin to superficial fascia, and the muscle groups that bound the cubital fossa. Also describes the posterior region's landmarks, skin, olecranon bursa and fascial attachments, and the course of the posterior cutaneous nerve of the forearm and the ulnar nerve.
Topic 28 of 40 in the MU Sofia syllabus for Anatomy (Topographic) (Medicine, Year 2). The free AceMed note covers it in 5 sections, about 287 words (2 min of reading), with 15 flashcards.
In this note
ELBOW REGION
Elbow :
Anterior region :
Posterior Region :
Neurovascular Structures:
Elbow :
Boundaries: Two circular lines passing 2 cm above and below the epicondyli humeri or the cubital fold.
Subdivision: Anterior and posterior elbow regions (regio cubitalis anterior and posterior), separated by vertical lines through the epicondyles.
Anterior region :
- External surface:
Three elevations: medial, intermediate, and lateral.
Medial Elevation: Origins of antebrachial flexor muscles from the medial epicondyle of the humerus.
Lateral Elevation: Origins of antebrachial extensor muscles from the lateral epicondyle.
Intermediate Elevation: Distal ends of m. biceps brachii and m. brachialis. Tendon and aponeurosis of m. biceps brachii palpable when forearm is halfway flexed and supinated.
Medial and lateral sulcii separate these elevations.
1. Skin
Thin and sensitive skin, especially in the cubital fold.
2. Subcutaneus tissue.
Subcutaneous layer contains more fat in the sulcii.
3. Superficial fascia: Continuous with brachial fascia & antebrachii fascia . Thinnest at the intermediate elevation.
