Cycling-Related Compressive Neuropathy of the Deep Ulnar Motor Branch in the Hand: Is Sonography a Valid Tool?

Ultrasound of the Ulnar Nerve: A Pictorial Review

“…61 Repetitive microtrauma (Figure 27), as in sports like cycling, is reported to possibly determine UN palsy. 70,71 High-frequency US (with transducers at least up to 18 MHz) has been proven to be a valid tool with which to demonstrate the affected branch/es. 71 MRI has also been studied to demonstrate a change in the position of both the SBUN and DBUN with respect to the hook of the hamate related to wrist position, which may promote pathology in cyclists.…”

“…70,71 High-frequency US (with transducers at least up to 18 MHz) has been proven to be a valid tool with which to demonstrate the affected branch/es. 71 MRI has also been studied to demonstrate a change in the position of both the SBUN and DBUN with respect to the hook of the hamate related to wrist position, which may promote pathology in cyclists. 72 Hypothenar hammer syndrome is related to repetitive microtrauma too, leading to thrombosis and/or aneurysm of the ulnar artery (Figure 28); the nerve may be possibly compressed as well.…”

“…Repetitive microtrauma (Figure 27), as in sports like cycling, is reported to possibly determine UN palsy 70,71 . High‐frequency US (with transducers at least up to 18 MHz) has been proven to be a valid tool with which to demonstrate the affected branch/es 71 .…”

Review Article “Spotlight on Ultrasonography in the Diagnosis of Peripheral Nerve Disease: The Evidence to Date”

“… 65 , 66 Importantly, the majority of these electrodiagnostically “non-localising” ulnar neuropathies can be localised with ultrasound. 65 , 66 In addition, ultrasound can readily diagnose ulnar nerve injury at Guyon’s canal for example due to cycling-related wrist compression, 67 intraneural ganglion cyst 68 or ulnar artery thrombosis. 69…”