The suprascapular nerve is anaesthetized deep to the omohyoid muscle with ultrasound-guidance
The suprascapular nerve runs relatively close to the divisions of the brachial plexus in this location implying a risk of medial spread of local anaesthetic to the brachial plexus
Ref: Siegenthaler et al. (2012)
Suprascapular nerve (red arrow), omohyoid muscle (magenta asterix), supraclavicular divisions of the brachial plexus (green arrows), L = lateral, M = medial
