The nerve to coracobrachialis is the most proximal branch of the musculocutaneous nerve, arising before it pierces the coracobrachialis. It enters the coracobrachialis on its medial surface and provides the sole motor supply to this muscle. It is the first motor branch of the musculocutaneous nerve and its injury level localises a brachial plexus lesion.
Coracobrachialis denervation from a proximal musculocutaneous nerve injury indicates the lesion is at or above the coracobrachialis entry point, proximal to the emergence of the nerve from the lateral cord. EMG of the coracobrachialis is included in brachial plexus EMG protocols to localise the injury level. The nerve is at risk during coracoid transfer (Latarjet procedure) and coracobrachialis surgical approaches.
Coracobrachialis denervation alongside biceps and brachialis weakness indicates a lateral cord or proximal musculocutaneous nerve lesion, localisable by EMG to above the coracobrachialis innervation level.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
