322_Shoulder_complex

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Author:
itzlinds
ID:
252701
Filename:
322_Shoulder_complex
Updated:
2013-12-17 07:25:01
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Shoulder complex
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shoulder complex
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  1. 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
  2. Which of the following muscles does not create adduction at the shoulder joint?

    Teres Major
    Latissimus Dorsi
    Clavicular Pectoralis Major
    Posterior Deltoid
    posterior deltoid
  3. 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
  4. Which of the following muscles creates horizontal adduction at the shoulder joint?

    Teres Major
    Latissimus Dorsi
    Clavicular Pectoralis Major
    Posterior Deltoid
    clavicular pectoralis major
  5. Which of the following muscles creates external rotation at the shoulder joint?

    Teres Major
    Latissimus Dorsi
    Clavicular Pectoralis Major
    Posterior Deltoid
    posterior deltoid
  6. Which of the following muscles creates flexion at the shoulder joint?

    Teres Major
    Latissimus Dorsi
    Clavicular Pectoralis Major
    Posterior Deltoid
    clavicular pectoralis major
  7. Which motion of the shoulder girdle does the levator scapulae create?

    Adduction
    Depression
    Abduction
    Elevation
    elevation
  8. Which motion of the shoulder girdle does the serratus anterior create?

    Adduction
    Depression
    Abduction
    Elevation
    abduction
  9. Which motion of the shoulder girdle does trapezius I create?

    Adduction
    Depression
    Abduction
    Elevation
    elevation
  10. Which motion of the shoulder girdle does trapezius III create?


    Adduction
    Depression
    Abduction
    Elevation
    adduction
  11. 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
  12. Function of shoulder complex?
    • Movement of hand through space
    • mobility is primary fxn
    • moving scapula, more ROM
  13. what makes up the shoulder complex?
    • the shoulder gridle
    • the shoulder joint
  14. which structures make up the shoulder gridle?
    • Scapula: focus on the motion of the scapula; motion of the shoulder gridle
    • Sternum
    • Clavicle
  15. 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.
  16. 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
  17. 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
    • protraction: lateral aspect, clavicular, moves anterior
    • retraction: lateral aspect, clavicular, moves posterior
    • occus in transverse plane
    • 15 degrees of each motion

    • posterior upward rotation
    • inferior portion, clavicular, moves
    • occurs in a plane close to sagittal
    • 30-70 degress of motion
  18. 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
  19. 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
  20. 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 rotation
    • frontal plane

    • medial/lateral rotation
    • transverse plane
    • ex: reaching forward= lateral rotation

    • anterior/posterior tilting
    • sagittal plane
  21. what is the fxn of the acrominalclavicular joint:
    • Maintain congruency with thorax
    • • More often injured than SC
    • • AC sprain = “Shoulder separation”
  22. list the ligaments that provide stablity at the acrominalclavicular joint:
    Aponeurosis of trapezius & deltoid

    • ligaments
    • AC superior/inferior/anterior/posterior
    • Coracoclavicular - conoid and trapezoid (resists superior motion)
  23. 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
  24. 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)
  25. 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)
  26. what are the components of scapular elevation:
    • SC elevation
    • AC anterior tipping
  27. 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
  28. describe the motions of protraction and retraction:
    • protraction
    • abduction
    • midline of scapula moves away from the spine

    • retraction
    • adduction
    • midline of scapula moves back to the spine
  29. describe upward/downward rotation:
    • center of scapula
    • defined by orientation of the glenoid fossa

    • upward
    • glenoid fossa positioned superiorly, laterally

    if the humerus moves upward, the scapula goes thru some degree of upward rotation
  30. describe elevation/depression
    shrug your shoulders
  31. describe winging:
    • Medial/lateral rotation of scapula
    • occurs at the end of protraction
  32. deccribe tipping:
    • Anterior/posterior tipping of scapula
    • occurs at the end range of elevation
  33. 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
  34. list the 3 posterior muscles of the shoulder gridle:
    • • Trapezius
    • • Levator scapulae
    • • Rhomboids - major & minor
  35. 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
  36. list the fxns of the levator scapulae:

    describe how the levator scapulae force couples with the weight of the arm:
    • fxns
    • Elevation
    • Downward rotation

    • describe how the levator scapulae force couples with the weight of the arm
    • – Weight pulls scapula down
    • – Levator lifts medial angle
  37. 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
  38. list the 3 anterior muscles of the shoulder gridle:
    • • Serratus anterior
    • • Pectoralis minor
    • • Subclavius
  39. what are the fxns of the serratus anterior:
    • • Protraction
    • • Upward rotation with
    • trapezius (force couple)
    • • Active in reaching and
    • pushing
  40. what are the 4 fxns of the pectoralis minor:
    • • Downward rotation
    • • Upward tilt
    • • Depression
    • • Lifting effect on ribs in force inspiration and posture
  41. what are the 2 fxns of the subclavius
    • • Protect and stabilize SC joint
    • • Depress scapula
  42. 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
  43. list 2 examples of force couples:
    • • Trapezius & Serratus anterior
    • – Produce protraction & upward rotation of scapula
    • • Deltoid & Supraspinatus
    • – Produce abduction at GH joint
  44. list the muscle the produce protraction at the shoulder gridle:
    • • Serratus anterior
    • • Pectoralis minor
  45. list the muscles that produce retraction at the shoulder gridle:
    • • Trapezius II, III, IV
    • • Rhomboids
  46. list the muscles that produces upward rotation at the shoulder gridle:
    • • Trapezius II, IV
    • • Serratus anterior
  47. list the muscles that produce downward rotation at the shoulder gridle:
    • • Levator scapulae
    • • Rhomboids
    • • Pectoralis minor
  48. list the muscles that produces elevation at the shoulder gridle:
    • • Trapezius I, II
    • • Levator scapulae
    • • Rhomboids
  49. list the muscles that produce depression at the shoulder gridle:
    • • Trapezius IV
    • • Pectoralis minor
    • • Subclavius

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