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48 Cards in this Set

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Pectoralis Major
P. Major
P. Major
Proximal Attachment of Clavicular Head of P. Major
Middle 1/2 of Clavicle
Proximal Attachment of Sternocostal Head of P. Major
Sternum
ist 6 Costal Cartilages
Aponerurosis of Ext. Oblique
Distal Attachment of P. Major
Intertubercular Groove of Humerus
Innvervation of P. Major
Medial and Lateral Pectoral Nerve
Cranial Nerve Innervation of the Clavicular and Sternocostal Head
C: C5 and C6 (Superior Trunk of Branchial Plexus)

S: C7 and C8-T1 (Middle and Inferior Trunk of Branchial Plexus)
What is the ACTION of P. Major
Adducts the Humerus Medially
Rotates the Humerus

Scapula Moves Forward
Acting alone the clavicular head

Acting together the sternocostal head
Flexes Humerus

Extends Humerus from flexed position
Shoulder and Superficial Back
Shoulder and Superficial Back
Shoulder and Superficial Back
What are the BONES of the Shoulder and Superficial Back
(4 BONES)?
Sternum

Clavicle

Scapula

Humerus
Where does the MEDIAL Part of the clavicle articulate w/ the Sternum (Manubrium)?

What is this
Clavicular Notch

Called a Sternoclavicular Joint
What does the LATERAL Part of the clavicle articulate with?
Acromium of the Scapula

Called the Acromioclavicular Joint
What is the importance of the Sternoclavicular Joint?
Only BONY attatchment of the Shoulder Complex to the Axial Skeleton
What is the Shape of the Clavicle and what contributes to that shape?
S- Shaped
Medial 2/3 is CONVEX anteriorly

Lateral 1/3 is CONCAVE anteriorly
The large vessels and nerves of the upper limb pass ___ to the clavicle
Posterior
The NAME of the clavicle between the Sternal and Clavicular Ends
SHAFT
Purpose of the Clavicle
Transmit forces of an outstreched arm from the UE to the axial skeleton
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
What elevates the Middle part of the clavicle
SCM
What bones of the UE are pressed down due to gravity
Lateral Part of Clavicle

Scapula

Humerus
When the clavicle is fractured ____ pulls the humerus medial which makes the clavicle parts over-ride each other
P Major
Be able to identify the parts of the Scapula
Anterior and Posterior
Glenoid means
Shallow, Smooth depression

Socket-like
The Suprascapular Notch is associated w/ what artery and nerve
Suprascapular Artery and Nerve
What is the differenece between the Anatomical Neck and the Surgical Neck of the Humerus
Anatomical- circles around the Humeral Head and it the site of attatchment for the Glenohumeral Joint

Surgical Neck- Common site of fractures
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
They Sternoclavicular (SC) Joint is a ___ type joint that functions as a ____ joint
Saddle Type- Synovial Joint

Ball in Socket
What do I mean when i say the
Convexities and Concavities on Both Bones
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
How many ligaments are associated w/ the SCJ and what are there names?
3
-Sternoclavicular Ligament (2- Anterior// Posterior)
-Interclavicular Ligament
-Costoclavicular Ligament
What are the functions of the ligaments of the SCJ
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
Dislocation of the clavicle is____ while ____ is more common due to the ligaments
Dislocation

Fracture
What movements does the SCJ permit
Elevation/Depression

Protraction/ Retraction

Rotation about the Long Axis
-90 degrees shoulder elevation
What is the blood supply to the SCJ
Internal Thoracic Artery

Suprascapular Artery
What is the innervation of the SCJ
Suprascapular Nerve

Nerve to Subclavius
While the SCJ joint is a Saddle type Synovial Joint,...What type of joint is the Acromioclaviular Joint
Plane type Synovial Joint
While the SCJ has an articulateing disk that divides the joint into 2 compartments, what type of disk does the ACJ have?
Fibrocartilage
-does not seperate the joint into compartments
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)
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)
Glenohumeral Joint is what type of synovial joint

Unique about this Joint
Ball in Socket

Most Moveable Joint in the Body!
What is the significance of having a glenoid fossa that is 1/3 the size of the humeral head
Allows for LOTS of movement
BUT
Not a lot of Stability
What enhance the stability of the GHJ
Contractile and Noncontractile Structures
Name the 4 NON-contractile Structues that add stability to the GHJ
Glenoid Labrum

Fibrous Joint Capsule

Coracoacromial Ligament

Glenohumeral Ligament
What is the NON-contractile Glenoid Labrum, and its function?
Fibrocartlagious Ring around that attatche to the MARGIN of the glenoid fosaa

Functions to increase the articulating surface area
What is the NON-contractile Fibrous Joint Capsule, appearence and its functions?
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
NON-contractile Coracoacromial Ligament Function?
Prevents SUPERIOR Dislocation of the GHJ

Along the Corocoid Process and the Acromium
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
Labral Tear is assoicated w/ what
Dislocation of Shoulder
-Bankart Lesion