Variations in suprascapular notch with or without an anomalous superior transverse scapular
ligament is a cause for suprascapular nerve entrapment syndrome.
Background: The suprascapular notch of scapula is converted into a foramen by superior transverse scapular
ligament (STSL) with the suprascapular nerve passing through the foramen and the suprasca-pular vessels passing above it.
Originating from the upper trunk of the brachial plexus, the suprascapular nerve passes through the suprascapular notch, beneath the transverse scapular
ligament and sends motor branches to the supraspinatus muscle.
The transverse scapular
ligament was transected to release the suprascapular nerve in the suprascapular notch.
Tountas & Bergman, 1993 say that these muscles include the scapuloclavicularis, a small muscle passing from the root of the coracoid process and transverse scapular
ligament to the back of the clavicle, and pectoralis intermedius, a fleshy slip that arises from the third and fourth ribs between pectoralis major and minor and is inserted onto the coracoid process, derived from to the fifth cervical to first thoracic myotomes.
6) They reported that abduction or horizontal adduction of the shoulder exerted traction on the suprascapular nerve, which led to its compression against the superior transverse scapular
A foramen is formed after bridging of this notch by a strong fibrous band like structure namely suprascapular ligament or transverse scapular
SUMMARY: The aim of this study was to verify the prevalence of the ossified superior transverse scapular
ligament (STSL) on dry bones of scapulae.
The lateral part of superior border of scapula contains suprascapular notch which is bridged by superior transverse scapular
ligament converting into foramen.
SUMMARY: Complete ossification of the superior transverse scapular
ligament is generally considered to be rare and has not been previously described in an Indian.
3) In human, it is commonly bridged by superior transverse scapular
ligament but by bone (ossified ligament) in some cases.
KEY WORDS: Superior transverse scapular
ligament; Ossification; Entrapment neuropathy.