Sentences with phrase «glenoid fossa»
The phrase "glenoid fossa" refers to a shallow, cup-shaped cavity located in the shoulder joint. It is part of the shoulder blade and acts as a socket where the upper arm bone connects, allowing for smooth movement of the arm. Full definition
Starting at the shoulder joint, or the glenoid fossa, the orientation of it is facing down such that the humerus (the bone running from shoulder to elbow) would be vertically oriented underneath.
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The shoulder joint — the glenoid fossa — is facing down such that the humerus (the bone running from shoulder to elbow) would be vertically oriented underneath.
These postural changes decrease glenohumeral stability as the glenoid fossa becomes more vertical due to serratus anterior weakness leading to abduction, rotation, and winging of the scapulae.
These act to provide dynamic stability and control the position of the humeral head relative to the glenoid fossa during motions ranging from throwing to performing a push - up (2).
The DB Bench Press and all of its variations is an open chain multi joint upper body movement that primarily recruits the pectoralis muscle groups along with contribution from the triceps brachii, anterior deltoid with assistance from all muscles attaching to the scapulae and abdominal wall to ensure proper movement of the scapulae and the humeral head within the glenoid fossa of the scapula.
Along with the increased impingement risk, a tight pec minor and subsequently inhibited serratus anterior causes the glenoid fossa to become more vertical in its alignment, resulting in increased abduction, rotation and winging of the scapula.
In some cadaver studies, the long head appears to assist in humeral compression in the glenoid fossa (Andrews et al. 1985), decreasing anterior migration of the humeral head during abduction and external rotation (Itoi et al. 1993), and providing torsional rigidity to the glenohumeral joint and reduce the stress on the glenohumeral ligaments during complex shoulder movements such as throwing (Karistinos et al. 2007).
Its main function is to assist in abducting the humerus and to hold the head of the humerus in the glenoid fossa.
The long head attaches on the infraglenoid tubercle — a bony process site on the lateral aspect of the scapula, below the glenoid fossa (shoulder socket).
Landin & Thompson et al. (2010) reported that the long head of the triceps was a significant stabilizer, which contributes towards the prevention of inferior translation of the humeral head in the glenoid fossa.
Thus the moment arm length of the deltoid is approximately zero and therefore, do not assist in rotation of the arm in the shoulder joint (glenoid fossa).
It is made up of the humeral head (the upper end of the bone of the upper arm) fitting into the glenoid fossa of the scapula (shoulder blade).