Search results
Results from the WOW.Com Content Network
The glenoid fossa of the scapula or the glenoid cavity is a bone part of the shoulder. The word glenoid is pronounced / ˈ ɡ l iː n ɔɪ d / or / ˈ ɡ l ɛ n ɔɪ d / (both are common) and is from Greek : gléne , "socket", reflecting the shoulder joint's ball-and-socket form. [ 1 ]
The glenoid fossa (shoulder socket) is positioned on the posterolateral (outer and rear) edge of the scapulocoracoid, a position significantly more lateral than other Devonian tetrapods (apart from Tulerpeton). Above the glenoid fossa is a raised area known as the supraglenoid buttress.
These features include a large interorbital breadth, a relatively flat superciliary arches, a prominent occipital bun, an asymmetrical and shallow mandibular notch shape, a high mandibular coronoid processus, the relative perpendicular mandibular condyle to notch crest position, and a narrow scapular glenoid fossa. [56] The modern human Oase 2 ...
In the temporal bone, the mandibular fossa is bounded anteriorly by the articular tubercle and posteriorly by the tympanic portion of the temporal bone, which separates it from the external acoustic meatus. The fossa is divided into two parts by a narrow slit, the petrotympanic fissure (Glaserian fissure).
Compared to equids, the scapula, while similar, is more triangular while its glenoid fossa is deeper and more rounded. [14] The humerus' head articulates with the glenoid cavity of a scapula while its lower end connects with the forearm's bones. The head is slightly oblique, making it more similar to those of rhinoceroses than those of tapirs.
Now, 20 years later, scientists are still struggling to understand the hobbit’s place in the human family tree. The remarkable fossil that radically changed our understanding of the human story ...
The rotator cuff muscles of the shoulder produce a high tensile force, and help to pull the head of the humerus into the glenoid cavity. The glenoid cavity is shallow and contains the glenoid labrum which deepens it and aids stability. With 120 degrees of unassisted flexion, the shoulder joint is the most mobile joint in the body.
The glenoid fossa allows for forward and backward movement of the mandible while the temporalis muscle, masseter, tongue and throat musculature may have all contributed to moving the lower jaw back. The pterygoid muscles would have been responsible for forward movement.