UNM DPT SHOULDER GIRDLE

WHAT ARE THE INTRA-ARTICULAR MOTIONS OF THE SC JOINT

ELEVATION/ DEPRESSION

PROTRACTION/RETRACTION

ANTERIOR/ POSTERIOR LONG AXIS

DURING WHAT MOTIONS IS THE SC JOINT CONVEX ON CONCAVE?

ELEVATION/DEPRESSION

DURING WHAT MOTONS IS THE SC JOINT CONCAVE ON CONVEX?

PROTRACTION/ RETRACTION

WHAT IS THE ROLE OF THE COSTOCLAVICULAR LIGAMENT AT THE SC JOINT?

LIMIT LATERAL CLAVICLE ELEVATION

HELPS WITH ROLL AND GLIDE OF MEDIAL CLAVICLE

ABSORB AND TRANSMIT SUPERIOR FORCES

WHAT IS THE ROLE OF THE INTERCLAVICULAR LIGMAMENT AT THE SC JOINT?

LIMIT EXCESSIVE CLAVICLE DEPRESSION

PROTECT STRUCTURES THAT PASS UNDER THE CLAVICLE

HOW DOES THE SC DISC EFFECT SC JOINT CONGRUENCY?

INCREASES STABILITY BY INCREASING CONGRUENCY

DECREASES MANUBRIAL STRESSES

ABSORBES FORCES ALONG THE CLAVICLE

HOW DOES THE SC DISC EFFECT SC JOINT MOTION ?

ACTS LIKE A PIVOT DURING ARM MOTIONS

APART OF MANUBRIUM DURING ELEVATION/ DEPRESSION

APART OF CLAVICLE DURING PROTRACTION/RETRACTION

WHAT ARE THE SCAPULAR MOVEMENTS THAT OCCUR AT THE AC JOINT?

INTERNAL EXTERNAL ROTATION

ANTERIOR POSTERIOR TILTING

UPWARD DOWNWARD ROTATION

ANTERIOR POSTERIOR TRANSLATION

MEDIAL LATERAL TRANSLATION

SUPERIOR INFERIOR TRANSLATION

WHAT IS THE RELEVANCE OF THE CORACOCLAVICULAR LIGAMENT TO AC JOINT FUNCTION?

UNITES THE CLAVICLE AND SCAPULA

COUPLES CLAVICLE ROTATION AND SCAPULA UPWARD ROTATION

PREVENTS MEDIAL DISPLACEMENT OF SCAPULA ON CLAVICLE

WHAT DOES THE CONOID PORTION OF THE CORACOCLAVICULAR LIGAMENT DO AT THE AC JOINT?

RESTRAINS INFERIOR TRANSLATION OF THE ACROMION

WHAT DOES THE TRAPEZOID PORTION OF THE CORACOCLAVICULAR JOINT DO AT THE AC JOINT

TRAPEZOID IS RESISTANT TO POSTERIOR TRANSLATIONS OF LATERAL CLAVICLE

WHAT TYPE OF JOINT IS THE GH?

BALL IN SOCKET SYNOVIAL

WHAT ARE THE PROS OF THE LARGE GLENOID ON THE SMALL FOSSA?

ALLOWS FOR GREAT ROM

WHAT ARE THE CONS OF LARGE GLENOID ON SMALL FOSSA?

DECREASED CONGRUENCE

INCREASED INSTABILITY

INCREASES DEGENERATION

WHAT IS THE ROLE OF THE GLENOID LABRUM

INCREASE FOSSA CONCAVITY

INCREASES ARTICULAR SURFACE

PROTECTS THE FOSSA

DECREASES HEAD TRANSLATIONS

MINIMIZES JOINT FRICTION

DISSIPATES CONTACT FORCES

ATTACHMENT SITE OF LONG HEAD BICEPS

WHAT IS THE MOST COMMON DIRECTION OF GH DISLOCATIONS?

ANTERIORLY & OR INFERIORLY

WHY IS GH ANTERIOR/ INFERIOR DISLOCATION SO COMMON?

SUPPORTING STRUCTURES ARE LESS APT AT DISSIPATING FORCES WHEN ARM IS ABD AND EXTERNALLY ROTATED

ABD AND EXTERNAL ROTATION PUSHES HUMERAL HEAD TO END ROM

TENSION ON GH JOINT AT ELEVATION CAN CREATE HEAD TRANSLATIONS INSTEAD OF STOPPING

WHAT SHOULDER JOINT IS THE LEAST SUSEPTIBLE TO DEGENERATION

SC JOINT

WHY IS THE SC JOINT THE LEAST SUSPETIBLE TO DEGENERATION

SURROUNDING STRUCTURES DISSIPATE FORCES

REDIRECTS ARTICULAR STRESS AWAY FROM JOINT

WHAT ARE THE ADVANTAGES TO THE CORACOACROMIAL ARCH?

SPACE UNDER THE ACROMION FOR TENDONS TO MOVE THROUGH

PROTECTS THE BRACHIAL PLEXUS

PREVENTS SUPERIOR TRANSLATION OF THE HUMERAL HEAD

WHAT ARE THE DISADVANTAGES OF THE CORACOACHROMIAL ARCH?

LIKELY TO CAUSE IMPINGEMENTS

COMPRESSION

ABRASION

BURSITIS

WHAT ARE THE INTRA-ARTICULAR MOTIONS OF THE GH JOINT?

ROLLING

GLIDING

SPINNING

WHAT IS THE PRIME MOVER OF SHOULDER ABD AND FLEXION

THE DELTOID

WHAT MUSCLE HAS TO ACT AS A SYNERGIST TO THE DELTOID?

THE SUPRASPINATOUS

WHY CAN THE SUPRSPINATOUS RODUCE ABDUCTION ALONE?

BECAUSE IT HAS A LARGE HORIZONTAL FORCE AND THE PULL IS FAR FROM THE CENTER OF ROTATION

WHAT ACCOUNTS FOR STATIC STABILIZATION OF THE GH JOINT?

PASSIVE TENSION OF THE ROTATOR CUFFS

SUPRASPINATOUS WORKS OVERTIME IF ROTATORS ARE DEFICIENT

WHAT ARE FIVE FACTORS OF DYNAMIC STABILIZATION OF GH JOINT IN FLEXION OR ABD

FORCE OF PRIME MOVERS

FORCE OF GRAVITY

FORCE OF MUSCULAR STABILIZERS

ARTICULAR SURFACE SHAPE

JOINT REACTION FORCE

WHAT IS THE TOTAL ROM FOR ELEVATION OF THE ARM/

150-180 DEGREES

HOW IS FULL ELEVATION ROM OF THE GH JOINT ACHIEVED?

THROUGH THE 2-1 SCAPULOTHORACIC RHYTHM

HOW DOES SHAPE OF CLAVICLE CONTRIBUTE TO ELEVATION OF THE ARM

SHAPE ALLOWS FOR ROTATION, TRANSLATION, ELEVATION, DEPRESSION, PROTRACTION

THESE MOVEMENTS COUPLE WITH MOVEMENTS OF THE SCPULA TO PRODUCE ELEVATION

WHAT ARE THE MUSCLES THAT PRODUCE SCAPULAR AND HUMERAL ELEVATION

DELTOIDS

SITS

SERRATUS ANTERIOR

RHOMBOIDS

TRAPEZIUS

CAN ELEVATION OF THE ARM STILL OCCUR IF THE ST JOINT WAS FUSED?

YES FLEXION AND EXTENSION CAN STILL OCCUR

ROM WILL BE SMALLER THAN THE NORM

WHAT IS THE MOST COMMON TYPE OF INJURY AT THE AC JOINT

DISLOCATIONS

WHAT TYPES OF DEFICIENCIS ARE LIKELY IF AC JOINT DISLOCATES

DYSREGULATION OF THE REST OF THE SHOULDER GIRDLE

DECREASE ROM IN MOTION OF ARM ELEVATIONS

What is a consequence of coracoclavicular ligament rupture related to joint stability?

AC joint stability compromised

How does coracoclavicular ligament rupture affect resistance?

Decreased resistance to translations and rotations

What coupling is compromised due to coracoclavicular ligament rupture during arm elevation?

Compromised coupling of posterior clavicle rotation and scapular upward rotation

WHAT AMOUNTS OF ARM ELEVATION ROM ARE AVAILABLE IF GH IS FROZEN

SCAPULAR SUBSTITUTION 60 DEGREES OF ELEVATION POSSIBLE

WHAT ARE THE EFFECTS ON MOTION FROM A FROZEN SUPRASPINATOUS?

STRENGTH OF ELEVATION SIGNIFICANTLY DECREASED

DELTOID WOULD BE UNAPPOSED

DELTOID WOULD CRASH INTO ACROMIAL ARCH

LOSS OF ELEVATION AND ABDUCTION FORCE

What is a consequence of a paralyzed rotator cuff?

No deltoid opposition

What happens to the deltoid in the absence of rotator cuff function?

Deltoid would crash into the coracoacromial arch

What condition can result from a paralyzed rotator cuff?

Impingement

What is insufficient during abduction with a paralyzed rotator cuff?

ROTATION OF THE HUMERUS

What is a consequence of a paralyzed serratus anterior regarding scapula movement?

Inefficient protraction and retraction of the scapula

What is impaired during arm elevation due to a paralyzed serratus anterior?

Upward rotation of the scapula

What condition may occur as a result of a paralyzed serratus anterior?

Scapular winging

Can abduction and flexion still occur with a paralyzed serratus anterior?

Yes, abduction and flexion can still occur

EFFECTS OF PARALYZED TRAPEZIUS

SCAPULA SITS IN A DOWNWARD POSITION

FULL ABD CANNOT OCCUR

FLEXION ROM DECREASED

WHAT IS THE ROLE OF THE RHOMBOIDS DURING ELEVATION OF THE ARM?

PRODUCES DOWNWARD ROTATION OF THE MEDIAL SCAPULAR

WHAT MUSCLES DO THE RHOMBOIDS WORK WITH SYNERGISTICALLY DURING ARM ELEVATION

TRAPEZIUS AND TRAPS

OFFSETS LATERAL TRANSLATION

WHAT MUSCLES DOES THE RHOMBOID HAVE TO WORK WITH SYNERGISTICALLY TO CAUSE ADD AND DEPRESSION?

THE RHOMBOIDS

WITHOUT THE RHOMBOIDS WHAT MOVEMENT IS CAUSED BY THE TERES MINOR

MOVEMENT OF THE HUMERUS INSTEAD OF THE SCAPULA

AT WHAT ANGLE DOES DELTOID ACTIVITY INCREASE

PAST 90 DEGREES BECAUSE MORE MOTOR UNITS ARE NEEDED TO PRODUCE MOVEMENT

ACTIVE AND PASSIVE TENSION DEMINISHES

MORE MOTOR UNITS NEEDED TO RESIST FORCE OF GRAVITY