Histology, Vascularity and Innervation of the Glenoid Labrum
Dr Alashkham and his colleagues have reported that the glenoid labrum is fibrocartilaginous, being more fibrous in its periphery, and is vascularised, with the anterosuperior aspect having a rich blood supply.
Free sensory nerve fibres were also present; no encapsulated mechanoreceptors were observed. The presence of sensory nerve fibres in the glenoid labrum could explain why tears induce pain. It is postulated that these sensory fibres could play a role in glenohumeral joint proprioception.
The paper has been published in the Journal of Orthopaedic Surgery and it is free to download.
Journal article: Histology, vascularity and innervation of the glenoid labrum