Anatomy Test III

Start Studying!

Terms

undefined, object

copy deck

Pectoralis 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
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

Start Studying!

Deck Info

Number of cards 48