Covers the elbow region, starting with its boundaries and its division into anterior and posterior parts. The anterior region is described by its external surface, with three elevations and two sulci, followed by the layers from skin to superficial fascia and the muscle groups that bound the cubital fossa. The posterior region is then outlined through its landmarks, skin, superficial fascia with a subcutaneous bursa, brachial fascia, and the course of the posterior cutaneous nerve of the forearm and the ulnar nerve. A labelled picture accompanies each of the two main parts.
Topic 226 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 5 sections, about 291 words (2 min of reading), with 11 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 sulci separate these elevations.
1. Skin
Thin and sensitive skin, especially in the cubital fold.
2. Subcutaneous tissue.
Subcutaneous layer contains more fat in the sulci.
3. Superficial fascia : continuous with brachial fascia & antebrachii fascia . Thinnest at the intermediate elevation.
