Shoulder Joint Flashcards
What are the Scapular Landmarks?
~Glenoid Fossa ~Subscapular Fossa ~Infraspinous Fossa ~Supraspinous Fossa ~Lateral Border ~Medial Border ~Labrum (Fibrocartilaginous) ~Acromion Process
What are the four groups of motions that are possible at the shoulder?
Flexion/Extension
ABduction/ADduction
Medial/Lateral Rotation
Horizontal ABduction/ADduction
What are the Humeral Landmarks?
~Head of Humerous ~Anatomical Neck ~Surgical Neck ~Shaft of the Humerous ~Greater Tubercle ~Lesser Tubercle ~Deltoid Tuberosity ~Intubecular Groove
What muscles make up the Rotator Cuff?
Supraspinatus S
Infraspinatus I
Teres Minor T
Subscapularis S
What are two types of Bursae?
Subdeltoid (located between the deltoid and the joint capsule)
Subacromial (Lies below the acromion and coracoacromial ligament.)
What does the rotator cuff do?
These muscles help keep the head of the humerus “rotating” against the glenoid fossa during joint motion.
What all is involved in shoulder stability?
- Glenoid Labrum
- Glenoid Fossa Anterior/Lateral and Upward Direction
- Coracohumeral and Glenohumeral Ligaments Reinforce Joint Capsules
- Capsule completely surrounds the fossa, creates partial vaccum
- Rotator Cuff Muscle
- Shoulder Muscle
Define the OIAN of the Anterior Deltoid.
O: Anterior: Lateral 1/3 of clavicle
I: Deltoid Tuberosity
A: Flexion
Medially Rotate
Horizontal ADduction
ABduction
N: Axillary C5,6
Define the OIAN of the Middle Deltoid.
O: Acromion Process
I: Deltoid Tuberosity
A: ABduction
N: Auxillary C5,6
Define the OIAN of the Posterior Deltoid.
O: Spine of Scapula
I: Deltoid Tuberosity
A: Extension, Lateral Rotation, Horizontal ABduction, ADduction
Define the OIAN of the Supraspinatus.
O: Supraspinous Fossa of Scapula
I: Greater Tuberosity of Humerous
A: Shoulder ABduction, Stabilizes head of Humerus in Glenoid Cavity
N: Suprascapular, C5,6
Define the OIAN of the Pectoralis Major.
O: Medial Half of Clavicle
Sternum
Cartilage of ribs 1-6
I: Crest of Greater Tubercle of Humerous
A: (all fibers) ADduct the Shoulder
Medially Rotate
Assist in Elevating Thorax during Inhalation
(Upper Fibers) Flex Shoulder
Horizontally ADduct
(Lower Fibers) Extend the Shoulder
N: Lateral and Medial Pectoral, C5-T1
Define the OIAN of the Teres Major.
O: Inferior Angle
1/3 Lateral Border of Scapula
I: Crest & Lesser Tubercle of Humerus
A: Shoulder Extension
ADduct
Medially RotateDefine the OIAN of the Latissimus Dorsi.
O: Inferior Angle of Scapula
Spinous Process of Last 6 Thoracic Vertebrae
Last 3-4 Ribs
Thorocolumbar aponeurosis
Post Illiac Crest
I: Intertubercular Groove of Humerus
A: Shoulder Extension
ADduct
Medially Rotate
N: Thoracodorsal C6,7,8
Define the OIAN of the Infraspinatus.
O: Infraspinous Fossa of Scapula
I: Greater Tubercle of Humerus
A: Shoulder Lateral Rotation
ADduct Shoulder
Stabilize Head of Humerus
N: Suprascapular, C4,5,6
Define the OIAN of the Teres Minor.
O: Upper 2/3 of Lateral Border of Scapula
I: Greater Tubercle of Humerus
A: Laterally Rotates Shoulder
ADducts Shoulder
Stabilizes Head of Humerus
N: Auxillary, C5,6
What does the long head of the Triceps separate?
Separates the Teres Major and Teres Minor at the axilla.
Define the OIAN of the Subscapularis.
O: Subscapular Fossa
I: Lesser Tubercle of Humerus
A: Medially Rotates Shoulder
Stabilizes the Head of the Humerus
N: Subscapular, C5,6,7
Define the OIAN of the Coracobrachialis.
O: Coracoid Process of Scapula
I: Medial Surface of Mid-humeral Shaft
A: Flex and ADduct Shoulder
N: Musculocutaneous, C6,7
Define the OIAN of the Subclacius.
O: 1st Rib and Cartilage
I: Inferior Surface of Middle 1/3 of Clavicle
A: Depress the Clavicle
Elevate 1st Rib
Stabilize the Sternoclavicular Joint
N: Subclavian C5,6
Define the OIAN of the Biceps Brachii.
O: Supraglenoid Tubercle
Coracoid Process
I: Radial Tuberosity
Aponeurosis of Biceps Brachii
A: Shoulder Flexion
Elbow Flexion
Forearm Supination
N: Musculocutaneous, C5,6
Define the OIAN of the Triceps Brachii.
O: Infraglenoid Tubercle
Posterior Surface of Proximal Half of the Humerous
Posterior Surface of Distal Half of Humerus
I: Olecranon Process of Ulna
A: (ALL) Elbow Extension
(Long Head) Extend and ADduct Shoulder
N: Radial, C6,7,8,T1
What motion occurs when the Deltoid and the Rotator Cuff Function together?
These muscles cause ABduction.
Which muscles provide Flexion?
Anterior Deltoid
Pectoralis Major
Which muscles provide Extension?
Posterior Deltoid
Latissimus Dorsi
Teres Major
Pectoralis Major
Which muscles cause Hyperextension?
Latissimus Dorsi
Posterior Deltoid
Which muscles provide ABduction?
Deltoid
Supraspinatus
Which muscles provide ADduction?
Pectoralis Major
Teres Major
Latissimus Dorsi
Which muscles provide Horizontal ABduction?
Posterior Deltoid
Infraspinatus
Teres Minor
Which muscles provide Horizontal ADduction?
Pectoralis Major
Anterior Deltoid
Which muscles provide Lateral Rotation?
Infraspinatus
Teres Minor
Posterior Deltoid
Which muscles provide Medial Rotation?
Latissimus Dorsi Teres Major Subscapularis Pectoralis Major Anterior Deltoid
What is SITS an acronym for?
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
SITS is an acronym. Knowing what the acronym stands for, which ones are inserted into the Greater Tubercle and which ones insert into the Lesser Tubercle?
Greater:
~Supraspinatus
~Infraspinatus
~Teres Minor
Lesser:
~Subscapularis
What Spinous Process is equal with the Spine of the Scapula?
T2
When asked what type of joint the shoulder is and FLUID is mentioned with it, what is the name of that joint?
Synovial Joint
When asked what type of joint the shoulder is you would say?
Ball and Socket
What do all of the deltoids do together?
ABduct
