40. Muscles of the forearm - posterior group . Forearm fascia
Covers the muscles of the forearm, organised into anterior (flexor), lateral and posterior (extensor) groups. Tables give origin, insertion, innervation and function for each muscle, with the anterior flexors split into superficial, intermediate and deep layers and the posterior extensors into superficial and deep layers. Blood supply and the course of the median nerve through the cubital fossa are noted, and the note closes with a brief section on the antebrachial fascia.
Topic 39 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 95 words (6 min of reading), with 12 flashcards.
In this note
FOREARM MUSCLES
Anterior (flexor) muscles: (3 layers)
Lateral muscles : (2)
Posterior (Extensor) muscles : (10)
ANTEBRACHIAL FASCIA
Anterior (flexor) muscles: (3 layers)
All anterior muscles innervated by Median n. except flexor carpi ulnaris & medial half of flexor digitorum profundus
Arm muscles control forearm actions
forearm muscles control wrist actions
(8 muscles)
Superficial :
Blood Supply:
Post. ulnar recurrent arts.
Ant. ulnar recurrent arts.
Recurrent ulnar art. + radial arteries
Brachial, ulnar & radial arteries
*Median nerve exits the cubital fossa by passing between the two heads of the muscle.
Intermediate:
Deep
Posterior (Extensor) muscles : (10)
Superficial layer :
carpai ulnaris → metacarpal V
carpi radialis → u. II & III
pollicis longus → thumb.
digitorum → 4 fingers.
Deep layer
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