-
Which of the following muscles does not create extension at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
Clavicular pectoralis major
-
Which of the following muscles does not create adduction at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
posterior deltoid
-
Which of the following muscles does not create internal rotation at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
posterior deltoid
-
Which of the following muscles creates horizontal adduction at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
clavicular pectoralis major
-
Which of the following muscles creates external rotation at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
posterior deltoid
-
Which of the following muscles creates flexion at the shoulder joint?
Teres Major
Latissimus Dorsi
Clavicular Pectoralis Major
Posterior Deltoid
clavicular pectoralis major
-
Which motion of the shoulder girdle does the levator scapulae create?
Adduction
Depression
Abduction
Elevation
elevation
-
Which motion of the shoulder girdle does the serratus anterior create?
Adduction
Depression
Abduction
Elevation
abduction
-
Which motion of the shoulder girdle does trapezius I create?
Adduction
Depression
Abduction
Elevation
elevation
-
Which motion of the shoulder girdle does trapezius III create?
Adduction
Depression
Abduction
Elevation
adduction
-
what are the fxns of the shoulder complex in general?
- mobility vs stability concept: only point of attachment to the axial skeleton
- Girdle provides some stability for UE:
- Assists in greater ROM of GH joint
- Movement of girdle not dependent on
- shoulder joint and muscles: scapula can move independtly, L and R, and scapula has its own muscularture
- Shoulder has dynamic stability: muscles aid in dynamic stability; must be active to keep complex congruent
-
Function of shoulder complex?
- Movement of hand through space
- mobility is primary fxn
- moving scapula, more ROM
-
what makes up the shoulder complex?
- the shoulder gridle
- the shoulder joint
-
which structures make up the shoulder gridle?
- Scapula: focus on the motion of the scapula; motion of the shoulder gridle
- Sternum
- Clavicle
-
list the 3 joints of the shoulder gridle:
- Sternoclavicular (SC)
- Acromioclavicular (AC)
- Scapulothoracic (ST)
The scapula moves on the rib cage because joint motion occurs at the SC joint and, to a lesser extent, at the AC joint.
-
describe the following features of the sternoclavicular joint...
osteology:
joint type:
degrees of freedom:
- Osteology: Clavicle, Sternum & 1st rib
- cartilage
- Joint type: Arthrodial: Plane synovial: only snyovial joint to the axial skeleton
- Degrees of freedom: 3
- Only synovial articulation
- between axial & appendicular
- skeleton
-
list and describe the motions that occur at teh sternoclavicular joint (SC):
list the planes the motions occur in:
- elevation/depression...of the clavicular
- occurs in the frontal plane
- 45 degress of elevation
- 15 degrees of depression
- protraction/retraction
- retraction: lateral aspect, clavicular, moves posterior
- occus in transverse plane
- 15 degrees of each motion
- posterior upward rotationinferior portion, clavicular, moves
- occurs in a plane close to sagittal
- 30-70 degress of motion
-
list the 3 ligaments that support the sternoclavicular joint (SC):
- anterior and posterior sternoclavicular ligament
- costoclavicular ligament: resists forces/motions - superior
- sternoclavicular ligament:
resists the clavicle from being pulled apart
-
describe the following features of the acrominalclavicular joint (ACjoint)...
osteology:
joint type"
degrees of freedom:
- Osteology: Acromion, distal end of Clavicle
- Joint type: Arthrodial – Plane synovial
- Degrees of freedom: 3
- SC’s “little helper”
- provides accessory motion due to the muscularature of the scapula
- occur b/c of motions at the SC joint
-
list and describe the motions that occur at the acrominalclavicular joint:
list the planes of motions they occur in:
20-30 degrees total of gliding and roations
- upward/downward rotationfrontal plane
- medial/lateral rotationtransverse plane
- ex: reaching forward= lateral rotation
- anterior/posterior tiltingsagittal plane
-
what is the fxn of the acrominalclavicular joint:
- Maintain congruency with thorax
- • More often injured than SC
- • AC sprain = “Shoulder separation”
-
list the ligaments that provide stablity at the acrominalclavicular joint:
Aponeurosis of trapezius & deltoid
- ligamentsAC superior/inferior/anterior/posterior
- Coracoclavicular - conoid and trapezoid (resists superior motion)
-
list the general characteristics of the scapulothoracic joint:
- Not synovial joint; functional joint
- • Movement dependent on SC & AC joints
- • Dynamic support
- – No ligamentous support
- – No synovial features
- • Atmospheric pressure major holding force
-
list the following characteristics of the scapulothoracic joint...
osteology:
joint type:
degrees of freedom:
- Osteology: Scapula, Thorax
- Joint type: Concave scapula / Convex ribs
- Degrees of freedom: 0 (not a joint)
-
list the 5 pairs of confusing motions that occur at the scapulothoracic joint:
- Elevation / Depression
- Protraction (Abd) / Retraction (Add)
- Upward / Downward Rotation
- Medial / Lateral Rotation (Winging)
- Anterior / Posterior (Tipping)
-
what are the components of scapular elevation:
- SC elevation
- AC anterior tipping
-
what are the general characteristics of scapular motions:
- Allows optimal contact of humerus with
- glenoid fossa
- Allows additional ROM to elevation of arm
- Allows stable base for rolling and sliding of
- humeral head
-
describe the motions of protraction and retraction:
- protractionabduction
- midline of scapula moves away from the spine
- retractionadduction
- midline of scapula moves back to the spine
-
describe upward/downward rotation:
- center of scapula
- defined by orientation of the glenoid fossa
- upwardglenoid fossa positioned superiorly, laterally
if the humerus moves upward, the scapula goes thru some degree of upward rotation
-
describe elevation/depression
shrug your shoulders
-
describe winging:
- Medial/lateral rotation of scapula
- occurs at the end of protraction
-
deccribe tipping:
- Anterior/posterior tipping of scapula
- occurs at the end range of elevation
-
list the general characteristics of the muscularature of the shoulder gridle:
- Have proximal attachment on axial skeleton
- Distal attachment on scapula and/or clavicle Posterior & anterior groupings
-
list the 3 posterior muscles of the shoulder gridle:
- • Trapezius
- • Levator scapulae
- • Rhomboids - major & minor
-
is the fxns of trapezius..
I
II:
III:
IV:
- I. Elevation
- II. Elevation, upward rotation, retraction
- III. Retraction
- IV. Upward rotation, depression, retraction
- All fibers pull upward and
- retract when working
- together
-
list the fxns of the levator scapulae:
describe how the levator scapulae force couples with the weight of the arm:
- fxnsElevation
- Downward rotation
- describe how the levator scapulae force couples with the weight of the arm– Weight pulls scapula down
- – Levator lifts medial angle
-
what are the fxns of the rhomboids, major and minor:
what do weak rhomboids result in:
- • Downward rotation
- • Retraction
- • Elevation
- • Maintenance of good posture – With middle trap
weak rhombodis result in: rounded shoulders
-
list the 3 anterior muscles of the shoulder gridle:
- • Serratus anterior
- • Pectoralis minor
- • Subclavius
-
what are the fxns of the serratus anterior:
- • Protraction
- • Upward rotation with
- trapezius (force couple)
- • Active in reaching and
- pushing
-
what are the 4 fxns of the pectoralis minor:
- • Downward rotation
- • Upward tilt
- • Depression
- • Lifting effect on ribs in force inspiration and posture
-
what are the 2 fxns of the subclavius
- • Protect and stabilize SC joint
- • Depress scapula
-
what is the definition of force couples:
- Two forces whose points of application occur
- on opposite sides of an axis and in opposite
- directions to produce rotation of the body
-
list 2 examples of force couples:
- • Trapezius & Serratus anterior
- – Produce protraction & upward rotation of scapula
- • Deltoid & Supraspinatus
- – Produce abduction at GH joint
-
list the muscle the produce protraction at the shoulder gridle:
- • Serratus anterior
- • Pectoralis minor
-
list the muscles that produce retraction at the shoulder gridle:
- • Trapezius II, III, IV
- • Rhomboids
-
list the muscles that produces upward rotation at the shoulder gridle:
- • Trapezius II, IV
- • Serratus anterior
-
list the muscles that produce downward rotation at the shoulder gridle:
- • Levator scapulae
- • Rhomboids
- • Pectoralis minor
-
list the muscles that produces elevation at the shoulder gridle:
- • Trapezius I, II
- • Levator scapulae
- • Rhomboids
-
list the muscles that produce depression at the shoulder gridle:
- • Trapezius IV
- • Pectoralis minor
- • Subclavius
|
|
