Peripheral Nerves, Muscles, & Brachial Plexus 2 (part 2) Flashcards
Forms a triangular “strut” for suspending the Upper Limb from the trunk.
-Consists of the Scapula and Clavicle
-Humerus hangs from the “strut”
-Supports humerus and the rest of the upper limb
Pectoral Girdle (Shoulder Girdle)
Has a sternal end that articulates with the sternum to make the sternoclavicular joint and an Acromial End that articulates with the Acromion Process of the Scapula to form the Acromioclavicular Joint
Clavicle
On the scapula, the location of the glenoid fossa
Lateral Angle
A narrow rim of fibrocartilage that deepens the socket a little to hold the head of the humerus.
-Can tear, causing instability and pain. Needs surgical repair
-Teardrop Shaped
Glenoid Labrum
A very common injury; tear to the Glenoid Labrum
-Runs anterior to posterior
-Occurs when large amounts of force are applied to the Glenoid Labrum: fall on an outstretched arm, or in overhand activity like baseball pitchers
Superior Labrum Anterior Posterior (SLAP) Tear
A surgical neck fracture of the Humerus can damage which nerve?
Radial Nerve
Insertion: Lateral Lip of the Intertubercular Groove
Pectoralis Major m.
Insertion: within the Intertubercular Groove
Latissimus Dorsi m.
Insertion: Medial Lip of the Intertubercular Groove
Teres Major m.
Found about halfway down the humerus, where the Deltoid muscle inserts.
-Small bump
Deltoid Tuberosity
-Medial Epicondyle of the Humerus: big bump
-Lateral Epicondyle of the Humerus: lateral side bump
-Capitulum: sits opposite to the radial head
-Trochlea: looks like a stool
-Coronoid Fossa: Depression (Anterior)
-Lateral/Medial Supracondylar Ridge: ridges above epicondyles
-Olecranon Fossa (where the Olecranon Process of the Ulna fits during extension)
Distal Humerus Structures
