Suprascapular canal

The suprascapular canal is an anatomical passage between two openings found on the upper dorsal aspect of the shoulder. It is found bilaterally running on superio-lateral aspect of the dorsal surface of the scapula underneath the supraspinatus muscle.[1]

Suprascapular Canal
Lateral view of a schematic representation of a sagittal section of the suprascapular canal
Superior view of a schematic representation the suprascapular canal running on the scapula surface
Details
Identifiers
Latin'canalis suprascapularis'
Anatomical terminology

Structure

The suprascapular canal[2] is an osteofibrous canal situated in the spinoglenoid fossa conveying suprascapular nerve and vessels. Its passage covered by the supraspinatus fascia and connects between its entrance formed by the suprascapular notch (enclosed by the suprascapular ligament) and its exit formed by spinoglenoid notch (enclosed by the spinoglenoid ligament).[1][2]

Clinical significance

As the suprascapular nerve travels through the suprascapular canal narrow sites, it can potentially get entrapped leading to suprascapular nerve entrapment syndrome. The causes have different anatomical implications at each site. The mechanisms varies and range from anatomical variations to pathological formations as well as from nerve compression to dynamics and traction injuries. The most common causes potentially occur at the suprascapular canal entrance site due to suprascapular notch stenosis, and at its exit site due to synovial joint cystic formation (ganglion cyst) bulging through the spinoglenoid notch.[1]

References
  1. Al-Redouan, Azzat; Holding, Keiv; Kachlik, David (2020). ""Suprascapular canal": Anatomical and topographical description andits clinical implication in entrapment syndrome". Annals of Anatomy. doi:10.1016/j.aanat.2020.151593. PMID 32898658.
  2. Al-Redouan, Azzat; Kachlik, David (2022). "Scapula revisited: new features identified and denoted by terms using consensus method of Delphi and taxonomy panel to be implemented in radiologic and surgical practice". J Shoulder Elbow Surg. 31 (2): e68-e81. doi:10.1016/j.jse.2021.07.020. PMID 34454038.
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