Product Code Database
Example Keywords: television -jeans $79
barcode-scavenger
   » » Wiki: Brachioradialis
Tag Wiki 'Brachioradialis'.
Tag
20%

The brachioradialis is a of the that flexes the forearm at the . It is also capable of both and , depending on the position of the forearm. It is attached to the distal styloid process of the radius by way of the brachioradialis tendon, and to the lateral supracondylar ridge of the .


Structure
The brachioradialis is a superficial, fusiform muscle on the lateral side of the forearm. It originates proximally on the lateral supracondylar ridge of the . It inserts distally on the radius, at the base of its styloid process. Near the elbow, it forms the lateral limit of the , or elbow pit.
(2025). 9781451184471, Lippincott Williams & Wilkins.


Nerve supply
Despite the bulk of the muscle body being visible from the anterior aspect of the forearm, the brachioradialis is a posterior compartment muscle and consequently is innervated by the .
(2025). 9780444529022
Of the muscles that receive innervation from the radial nerve, it is one of only four that receive input directly from the radial nerve. The other three are the triceps, , and extensor carpi radialis longus. (All other posterior compartment muscles that receive radial innervation are supplied by the deep branch of the radial nerve.)


Function
The brachioradialis flexes the forearm at the elbow. When the forearm is pronated, the brachioradialis tends to supinate as it flexes. In a supinated position, it tends to pronate as it flexes. This also assists the .

The brachioradialis is a stronger elbow flexor when the forearm is in a midposition between and pronation at the radioulnar joint. When pronated, the brachioradialis is more active during elbow flexion since the biceps brachii is in a mechanical disadvantage.

With the insertion of the muscle so far from the fulcrum of the elbow, the brachioradialis does not generate as much joint as the or the biceps. It is effective mainly when those muscles have already partially flexed at the elbow. The brachioradialis flexes the forearm at the elbow, especially when quick movement is required and when a weight is lifted during slow flexion of the forearm.

The muscle is used to stabilize the elbow during rapid flexion and extension while in a midposition, such as in hammering. The brachioradialis is synergistic with the brachialis and biceps brachii; the triceps brachii and are antagonistic.Bowden, Bradley S. Bowden, Joan M. An Illustrated Atlas of Skeletal Muscles. 2nd ed. 2002Saladin, Kenneth S. Anatomy & Physiology. 4th ed. 2007


Additional images

External links
  • - "Transverse section through the left arm just proximal to the elbow."
  • - "Superficial muscles of the anterior (flexor) compartment of the left forearm."
  • - "Superficial muscles of the posterior (extensor) compartment of the left forearm."

Page 1 of 1
1
Post Comment
Font Size...
Font Family...
Font Format...

Page 1 of 1
1

Account

Social:
Pages:  ..   .. 
Items:  .. 

Navigation

General: Atom Feed Atom Feed  .. 
Help:  ..   .. 
Category:  ..   .. 
Media:  ..   .. 
Posts:  ..   ..   .. 

Statistics

Page:  .. 
Summary:  .. 
1 Tags
10/10 Page Rank
5 Page Refs