Document resource
We commend Chong et al on their comprehensive review of the axillary nerve’s anatomy and the four windows for nerve intervention.1 The axillary nerve emerges from the posterior cord and travels along the anterior surface of the subscapularis muscle until it reaches the quadrangular space. The subscapular nerves also contribute to the innervation of the anterior shoulder, but the spread of anesthetic to these nerves has not been studied. Notably, the subscapular nerves branch off the posterior cord much more proximally than the site typically targeted in anterior axillary blocks.2 Therefore, targeting both the axillary and subscapular nerves may provide superior anterior shoulder analgesia for acute postsurgical shoulder pain.