Anatomy of Guyon’s canal. Ulnar neuropathy at the wrist can produce 4 typical patterns of clinical deficit, depending on the site of compression (blue circles). Relevant ulnar nerve branches are shown in brown; osseous landmarks in black; zones of injury in gray. A lesion in Zone 2 can cause broad hand weakness (including of abductor digiti minimi) if the lesion is proximal, or it can involve only the deep branch to the lateral hand (if distal). Credit: Muscle & Nerve (2024). DOI: 10.1002/mus.28099 Although you may not always realize it, Read More