Unit 10 - Shoulder - Bones, Joints, Ligaments, Muscles
Which muscle has 3 heads
(3 = Tri) Triceps Brachii (long - scapula, lateral - lateral humerus, medial (posterior humerus)
Anterior shoulder muscles (3)
(A - BiCeP) 1) Pectoralis Major (chest, superficial, ADD, Int Rotation 2) Biceps Brachii (upper arm, shoulder flexion, elbow flexion, forearm supination) 3) Coracobrachialis (upper arm, shoulder flexion, ADD)
Which muscle runs through the bicipital groove
(Bi & Bi) . Biceps Brachii short head - coracoid process long head - glenoid (superior) *** attaches to the radius (radioal) tuberosity
Posterior shoulder muscles (3)
(P - ToTaL) 1) Triceps Brachii (posterior upper arm - 3 heads, shoulder and elbow extension) 2) Latissimus Dorsi (posterior back, superficial, shoulder ADD, Ext, Int Rotation) 3) Teres Major - (posterior shoulder, ADD, Ext, Int Rotation)
Scapular Muscles
3 Posterior - TLR (trailer) - Trapezius (elevation, depression, retraction), Levator Scapulae (elevation), Rhomboids (retraction) 1 Lateral/Posterior - Serratus Anterior (Protraction) 1 Anterior - Pectoralis Minor (Protraction, Depression
Which shoulder ligaments stabilize the AC joint
Acromioclavicular & Coracoclavicular (holds down the clavicle) ligament
What joint forms the clavical (acromion process) and scapula
Acromioclavicular joint (AC)
What ligaments attach to the CORAcoid process
CORAcohumeral & CORAcoclavicular ligaments
Which shoulder ligament forms the Acromial Arch
Coracoacromial ligament
Which shoulder ligament stabilizes the Superior GH joint?
Coracohumeral & Coracoacromial ligament (forms "Acromial Arch" over the humeral head
Which muscle has 3 regions (anterior, lateral, posterior) and is superficial
Deltoid - ABD, Flexion, Extension
What joint connects the Glenoid and Humeral
Glenohumeral joint
Which shoulder ligament has the fibrocartilage ring inside the GH joint (runs along outer edge of glenoid) - connects with the long head of biceps tendon
Glenoid Labrum
Glenohumeral Ligament (GHL)
Humeral head to Anterior Glenoid (Superior GHL, Middle, Inferior) Multidirectional Reinforces GH joint capsul
Which scapular muscle has a minor and major
Rhomboids (minor is superior to major)
Name the 4 shoulder joints
SAGS (droopy shoulder SAGS) 1) Sternoclavicular (Sterum to Clavical) 2) Acromioclavicular (Acromion process (Scapula) to Clavicle) 3) Genohumeral (Glenoid (Scapula) to Humeral head) 4) Scapulothoracic Joint (Scapular to Posterior Rib)
Rotator Cuff Muscles (4)
SITS supraspinatus (ABD), infraspinatus . (Ext Rotation), teres minor (Ext Rotation), subscapularis (Int Rotation)
Which of the shoulder joints is a non-traditional joint?
Scapulothoracic joint
Which scapular muscle prevents scapular "winging" (shoulder blade/scapula sticks out) - scapular protraction
Serratus Anterior
Which shoulder ligament holds the long head of biceps tendon in the bicipital groove
Transverse Humeral Ligament
Most superficial scapular muscle
Trapezius
Which scapular bone forms a "roof' over the humerus head?
acromion process
combination of shoulder muscles working together
downward rotators (rhomboids, levator scapulue, pectoralis minor) (RoLP down)
Scapular Motions
elevation (superior motion - shoulder shrug), depression (inferior), protraction (lateral - shoulders forward), retraction (medial), upward rotation (inferior angle rotates lateral), downward rotation (rotates medial)
Shoulder motions
flexion / extension, abduction / ADDuction (horizontal), internal / external rotation
Which large muscle goes through the armpit, attaches ???
latissimus dorsi
Which shoulder landmark tells you anterior or posterior side of the scapula
spine
What does the Rotator Cuff Muscles stabilize
stabilizes humeral head against glenoid
combination of shoulder muscles working together
upward rotators (S&T - STep up)