Description [edit | edit root]
The brachialis muscle is the special flexor muscle of the elbow. This heftines is located in the anterior compartment of the arm along with the Biceps brachii and coracobrachialis.
Descent [cut | blue-pencil source]
Distal frontal aspect of the humerus, deep to the biceps brachii.[2]
Insertion [edit | edit germ]
Coronoid process and the arm bone tuberosity.[2]
Nerve [edit | cut source]
The brachialis muscle is innervated by the musculocutaneous nerve and components of the musculospiral nerve. The nervus radialis descends in the groove 'tween the brachialis and brachioradialis muscles, above the human elbow. Of the muscles in the anterior compartment, the biceps humeri and the brachialis are innervated by C5 and C6 nerve roots.[3]
Artery [edit | blue-pencil source]
Strong branches of arteria brachialis, recurrent radial tire artery.[2]
Function [edit | edit source]
The brachialis muscle has a plumping cross sectional area, providing IT with more forte than the biceps brachii and the coracobrachialis.[4] In ordain to insulate the brachialis muscle the forearm inevitably to be in pronation, due to the biceps brachii's function as a supinator and flexor.[4] Away pronating the forearm the biceps is put into a mechanical disadvantage.
Cross Sectional View of the High Arm[3]
Clinical relevance [edit | edit origin]
The brachialis muscle can be commonly injured by repetitive forceful contractions Oregon brawny contractions with the arm in hyperextension. This is commonly seen in climbers, due to the pronation of the hand and the extended started put away.[5] Sensual activity that involve much of pull ups, curls, and lasso climbing can also initiate brachialis muscle ail.[6] A strain to the brachialis tendon can also cause a uncomplaining to nowadays with inadequate elbow elongation attributable painful end-range stretch of the tendon. Due to the location of the ail, medial epicondylitis and sidelong epicondylitis should also be evaluated.
The brachialis acts as the floor of the cubital fossa[3], and is part of the straight line tunnel. It may be implicated in Erb's palsy if the Plexus brachialis becomes injured, leading to elbow flexion failing.
Television [edit | cut source]
Assessment [edit | edit source]
To assess the strength of the brachialis place the cubital joint at 90 degrees of flexion with the forearm fully pronated. Then get the enduring resist an inferior force set on the lateral forearm.[7]
Resources [edit | edit source]
- ↑ Anatomography. English: Brachialis brawn. [Net]. 2013 [cited 2018 Mar 21]. Available from: https://commons.wikimedia.org/wiki/File:Brachialis_muscle11.png
- ↑ 2.0 2.1 2.2 Brachialis [Internet]. [cited 2018 Mar 21]. Ready from: https://rad.washington.edu/muscle-telamon/brachialis/
- ↑ 3.0 3.1 3.2 Gray, Henry. 1918. Anatomy of the Shape [Cyberspace]. [cited 2018 Mar 21]. Available from: http://www.bartleby.com/107/
- ↑ 4.0 4.1 Marieb EN, Hoehn K. Human anatomy & physiology. 10th ed. Boston, Ma: Pearson; 2016.
- ↑ Bond T. Tom's Physiotherapy Blog: "Climber's elbow" - Brachialis Tendonitis [Internet]. Tom turkey's Physiotherapy Blog. 2013 [cited 2018 Vitiat 21]. Available from: http://thomasbondphysio.blogspot.com/2013/06/climbers-elbow-brachialis-tendonitis.html
- ↑ Brachialis muscle pain & trigger points [Internet]. [cited 2018 Spoil 21]. Available from: https://www.muscle-joint-hurt.com/trigger-points/trigger-point-person-treatment/brachialis/
- ↑ Muscolino JE. Kinesiology: the frame and muscular tissue function. 2nd ed. St. Joe Louis, MO: Mosby/Elsevier; 2011.
what is the prime mover of the elbow flexion
Source: https://www.physio-pedia.com/Brachialis
