Covers the skin and superficial fascia of the posterior forearm, including the veins crossing the region and the cutaneous nerve supply. It then lists the superficial extensor muscles and the deep layer, which includes the supinator and the thumb and index finger extensors and abductors, and notes the fascial separation between the two layers.
Inside: 1 section · 13 flashcards · 1 min
Topic 228 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 1 section, about 135 words (1 min of reading), with 13 flashcards.
In this note
Posterior Region of the forearm:
Posterior Region of the forearm:
1. The skin in this area is thicker and may have variable hair.
2. The superficial fascia is thin and loosely attached to the deep fascia.
3. Veins (e.g., cephalic and basilic veins) cross this region on their way to the anterior antebrachial region.
4. Cutaneous innervation is provided by the posterior antebrachial cutaneous nerve and branches from the medial antebrachial cutaneous nerve.
5 Muscles in the Superficial Layer:
Extensor muscles (from radius to ulna):
Extensor carpi radialis (longus and brevis)
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
6. Muscles in the Deep Layer:
Supinator muscle
Muscles for the thumb and index finger:
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indicis
Fascial Separation:
The two muscle layers are separated by a fascial space, with deep vessels and nerves situated between them.
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