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48 Cards in this Set
- Front
- Back
- 3rd side (hint)
Pectoralis Major
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P. Major
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P. Major
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Proximal Attachment of Clavicular Head of P. Major
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Middle 1/2 of Clavicle
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Proximal Attachment of Sternocostal Head of P. Major
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Sternum
ist 6 Costal Cartilages Aponerurosis of Ext. Oblique |
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Distal Attachment of P. Major
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Intertubercular Groove of Humerus
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Innvervation of P. Major
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Medial and Lateral Pectoral Nerve
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Cranial Nerve Innervation of the Clavicular and Sternocostal Head
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C: C5 and C6 (Superior Trunk of Branchial Plexus)
S: C7 and C8-T1 (Middle and Inferior Trunk of Branchial Plexus) |
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What is the ACTION of P. Major
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Adducts the Humerus Medially
Rotates the Humerus Scapula Moves Forward |
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Acting alone the clavicular head
Acting together the sternocostal head |
Flexes Humerus
Extends Humerus from flexed position |
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Shoulder and Superficial Back
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Shoulder and Superficial Back
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Shoulder and Superficial Back
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What are the BONES of the Shoulder and Superficial Back
(4 BONES)? |
Sternum
Clavicle Scapula Humerus |
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Where does the MEDIAL Part of the clavicle articulate w/ the Sternum (Manubrium)?
What is this |
Clavicular Notch
Called a Sternoclavicular Joint |
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What does the LATERAL Part of the clavicle articulate with?
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Acromium of the Scapula
Called the Acromioclavicular Joint |
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What is the importance of the Sternoclavicular Joint?
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Only BONY attatchment of the Shoulder Complex to the Axial Skeleton
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What is the Shape of the Clavicle and what contributes to that shape?
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S- Shaped
Medial 2/3 is CONVEX anteriorly Lateral 1/3 is CONCAVE anteriorly |
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The large vessels and nerves of the upper limb pass ___ to the clavicle
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Posterior
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The NAME of the clavicle between the Sternal and Clavicular Ends
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SHAFT
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Purpose of the Clavicle
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Transmit forces of an outstreched arm from the UE to the axial skeleton
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Where does the clavicle usually fracture
Why? Unique b/c? |
MIDDLE
-between medial 2/3 and lateral 1/3 B/c it is the thinnest part of the clavicle Only part w/ NO ligamentous attatchments |
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What elevates the Middle part of the clavicle
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SCM
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What bones of the UE are pressed down due to gravity
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Lateral Part of Clavicle
Scapula Humerus |
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When the clavicle is fractured ____ pulls the humerus medial which makes the clavicle parts over-ride each other
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P Major
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Be able to identify the parts of the Scapula
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Anterior and Posterior
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Glenoid means
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Shallow, Smooth depression
Socket-like |
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The Suprascapular Notch is associated w/ what artery and nerve
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Suprascapular Artery and Nerve
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What is the differenece between the Anatomical Neck and the Surgical Neck of the Humerus
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Anatomical- circles around the Humeral Head and it the site of attatchment for the Glenohumeral Joint
Surgical Neck- Common site of fractures |
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What are the names of the joints in the UE (4)?
Unique feature of one of the joints |
Sternoclavicular
-Manubrium w/ Clavicle Acromioclavicular -Acromium Process w/ Clavicle Glenohumeral -Scapula w/ the Humerus Scapulothoracic -Scapula w/ Thoracic Cavity -NOT A TRUE JOINT |
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They Sternoclavicular (SC) Joint is a ___ type joint that functions as a ____ joint
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Saddle Type- Synovial Joint
Ball in Socket |
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What do I mean when i say the
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Convexities and Concavities on Both Bones
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The ___ seperates the Saddle type Synovial Joint (SC Joint) into a 2 compartments
What is its purpose? |
Articulating Disk
-Absorbs Shock -Increases Stability of SCJ |
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How many ligaments are associated w/ the SCJ and what are there names?
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3
-Sternoclavicular Ligament (2- Anterior// Posterior) -Interclavicular Ligament -Costoclavicular Ligament |
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What are the functions of the ligaments of the SCJ
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Sternoclavicular Ligment
-Stabilizes the Joint Capsule both anteriorly and posteriorly Interclavicular Ligament -Stablilizes the Medial ends of the clavical Costoclavicular Ligament -attaches clavicles inferior medial end to the 1st rib and its costal cartilages |
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Dislocation of the clavicle is____ while ____ is more common due to the ligaments
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Dislocation
Fracture |
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What movements does the SCJ permit
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Elevation/Depression
Protraction/ Retraction Rotation about the Long Axis -90 degrees shoulder elevation |
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What is the blood supply to the SCJ
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Internal Thoracic Artery
Suprascapular Artery |
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What is the innervation of the SCJ
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Suprascapular Nerve
Nerve to Subclavius |
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While the SCJ joint is a Saddle type Synovial Joint,...What type of joint is the Acromioclaviular Joint
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Plane type Synovial Joint
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While the SCJ has an articulateing disk that divides the joint into 2 compartments, what type of disk does the ACJ have?
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Fibrocartilage
-does not seperate the joint into compartments |
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What are the 2 ligaments that are associated w/ the ACJ
-What is unique about one of these ligaments |
Acromioclavicular Ligament
Coracoclavicular Ligament -Has no joint stablilizing function b/c it does not cross a joint -formed by two other ligaments (conoid and trapezius ligaments) |
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Acromial Joint dislocation is common and usually due to what?
What is the result |
Fall on the tip of the shoulder
Tears both ligaments (AC and Coracoclavicular ligaments) |
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Glenohumeral Joint is what type of synovial joint
Unique about this Joint |
Ball in Socket
Most Moveable Joint in the Body! |
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What is the significance of having a glenoid fossa that is 1/3 the size of the humeral head
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Allows for LOTS of movement
BUT Not a lot of Stability |
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What enhance the stability of the GHJ
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Contractile and Noncontractile Structures
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Name the 4 NON-contractile Structues that add stability to the GHJ
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Glenoid Labrum
Fibrous Joint Capsule Coracoacromial Ligament Glenohumeral Ligament |
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What is the NON-contractile Glenoid Labrum, and its function?
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Fibrocartlagious Ring around that attatche to the MARGIN of the glenoid fosaa
Functions to increase the articulating surface area |
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What is the NON-contractile Fibrous Joint Capsule, appearence and its functions?
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Goes from the Margin of the Glenoid Fossa to the Anatomical Neck of the Humerus
Thin//Loose Folds inferiorly to let the shoulder ELEVATE -Stablity is Compromised |
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NON-contractile Coracoacromial Ligament Function?
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Prevents SUPERIOR Dislocation of the GHJ
Along the Corocoid Process and the Acromium |
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The NON-contractile Glenohumeral Ligaments
-How many? -Names? -Thickenings of what? -Support? |
-3
-Superior, Middle, Inferior -Thickenings of Fibrous Joint Capsule -Support GHJ Radiate from Superior Part of Labrum to the anatomical neck |
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Labral Tear is assoicated w/ what
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Dislocation of Shoulder
-Bankart Lesion |
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