Chpt. 5 Flashcards
(33 cards)
Shoulder joint: The price of mobility is reduced ____
stability
The ball is a lot larger than socket for what reason?
mobility
Two reasons for instability problems in the shoulder joint
- rotator cuff impingement
- subluxations & dislocations
What is the main function for the Rotator Cuff
keep the ball and socket in place
What is the difference between a subluxation and dislocation
subluxation- the ball is just moved ‘out of place’
dislocation- ball is completely out of the socket
What are the 3 bones that act as attachment for the shoulder joint muscles
- scapula
- clavicle
- humerus
Where is the subscapular fossa on the scapula?
The big curve, inside of the scapula
What are the (5) humeral landmarks
- head tubercle
- greater tubercle
- leasser tubercle
- intertubercular/ bicipital groove
- **deltoid tuberosity
The glenohumeral joint is an ____ (ball and socket) joint
ENARTHRODIAL
What is a major function of the Glenoid Labrum
the socket slight enhances stability
*What is the S.L.A.P lesion?
tear of labrum
What is the main function of the Glenohumeral ligaments
provide stability
3 reasons why to use a goiniometer
It’s important if somebody needs to know if there is SUBJECTIVE change happening
- PATIENTS: needs to know if they are improving
- 3RD party payer: ex. workers compensation need to know
- SURGENS
What is the degree of the Glenohumeral joint for ABDUCTION
90-95 degrees
What is the degree of the Glenohumeral joint for EXTENSION
40-60 degrees
What is the degree of the Glenohumeral joint for FLEXION
90-100
What is the degree of the Glenohumeral joint for INTERNAL AND EXTERNAL ROTATION
70-90
2 reasons why Lateral rotators are WEAK muscles
- laxity of ligamentous structures
- lack of strength and endurance in muscles
Why are rotator cuffs frequently injured
there is not much space, and it is therefore easily pinched
What are the (4) muscles that attach to the rotator cuffs
- subscapularis
- supraspinatous
- infrapinatous
- teres minor muslces
What is the main function of a rotator cuff?
to keep the humeral head within the glenoid fossa (the ball stable with the socket)
What are intrinsic and extrinsic glenohumeral muscles, and give an example of each
Intrinsic: small, short muscles ex=deltoid
Extrinsic: big muscles
ex=pectoralis major
Which plexus are all shoulder joint muscle innervated from?
Brachial plexus
Identify the nerves that supply this muscle:
- Pectoralis major (clavicular head)
- Pectoralis major (sternal head)
- Latissimus dorsi
- Lateral Pectoral:
- Medial pectoral:
- Thoracodorsal:
