Sensory innervation of the subacromial bursa by the distal suprascapular nerve: a new description of its anatomic distribution

Sensory innervation to the shoulder provided by the distal suprascapular nerve (dSSN) remains the subject of debate. The purpose of this study was to establish consensus with respect to the anatomic features of the sensory branches of the dSSN. The relevant hypothesis was that the dSSN would give of...

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Bibliographic Details
Published in:Journal of shoulder and elbow surgery 2019-09, Vol.28 (9), p.1788-1794
Main Authors: Laumonerie, Pierre, Blasco, Laurent, Tibbo, Meagan E., Bonnevialle, Nicolas, Labrousse, Marc, Chaynes, Patrick, Mansat, Pierre
Format: Article
Language:English
Subjects:
Acromioclavicular Joint - innervation
Aged
Aged, 80 and over
Anatomy
Bursa, Synovial - innervation
Cadaver
Female
Humans
Ligaments, Articular - innervation
Male
Peripheral Nerves - anatomy & histology
sensory innervation
Sensory Receptor Cells
Shoulder
Shoulder Joint - innervation
subacromial bursa
suprascapular nerve
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Summary:Sensory innervation to the shoulder provided by the distal suprascapular nerve (dSSN) remains the subject of debate. The purpose of this study was to establish consensus with respect to the anatomic features of the sensory branches of the dSSN. The relevant hypothesis was that the dSSN would give off 3 sensory branches providing innervation to the posterior glenohumeral (PGH) capsule, the subacromial bursa, in addition to the coracoclavicular and acromioclavicular ligaments. The division, course, and distribution of the sensory branches that originated from the dSSN and innervated structures around the shoulder joint were examined macroscopically by dissecting 37 shoulders of 19 fresh-frozen cadavers aged of 83.0 years (range, 74-98 years). The 37 dSSN provided 1 medial subacromial branch (MSAb), 1 lateral subacromial branch (LSAb), and 1 PGH branch (PGHb) to the shoulder joint. This arrangement allowed for bipolar—MSAb and LSAb—innervation of the subacromial bursa, acromioclavicular (MSAb and LSAb) and coracoclavicular (MSAb) ligaments, as well as the PGH capsule (PGHb). The dSSN provided 2 subacromial branches and 1 PGHb to the shoulder joint. This arrangement allowed for bipolar—MSAb and LSAb—innervation of the subacromial bursa, acromioclavicular and coracoclavicular ligaments, as well as the PGH capsule.
ISSN:1058-2746
1532-6500
DOI:10.1016/j.jse.2019.02.016