anatomy part 1 UE
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what connects the shoulder to the upper trunk:
spine of the scapula becomes continuous c/ the:
humerus articulates c/ the:
glenoid fossa of the scapula
what is the ONLY osseous attachment holding the upper extremity to the trunk:
what shape is the scapula?
curved to accommodate the chest wall
on the lateral end, the acromion process articulates c/ the clavicle to form:
what makes the glenoid fossa wider and deeper to accommodate head of the humerus;
the fibrocartilaginous Glenoid Labium
attaches the coracoid process and acromion:
what attaches clavicle to coracoid process:
- the corcoclavicular ligament
- Trapezoid ligament (front)
- Conoid ligament (behind)
attaches acromion and clavicle:
very little movement
which joint has the most movement?
what are the ligaments of the sternoclavicular ligaments?
- Ant/post sternoclavicular ligaments
movements of the scapula:
- upward rotation
- backward rotation
- scapula only provides 1/3 of total ROM
- in order for your arm to raise up last 1/3, scapula must not be fixed
structures on the proximal humerus:
- head of the humerus
- bicipital grove
- greater tubercle
- lesser tubercle
- deltoid tuberosity
what attaches to greater/lesser tubercle:
rotator cuff muscles attach
what attaches to the deltoid tuberosity:
this joint capsule itself is a loose, weak structure that permits lots of movement:
NOT for major support
movements of the glenohumeral joint:
- internal rotation
- external rotation
long head of the biceps muscle arises from:
long head of the triceps muscle arises from:
4 short muscles of the shoulder and their attachments:
- subscapularis (on front): lesser tubercle
- supraspinatus (on back): greater tubercle
- infraspinatus (on back): greater tubercle
- Teres minor (on back): greater tubercle
4 tendons converge on the humerus to form a continuous cuff of flat supportive tendons called the rotator cuff - keeps head from popping out.
what are the muscles from these 4 tendons?
- teres minor
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