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Kinesiology > Shoulder- Part 1- Kinematics > Flashcards

Shoulder- Part 1- Kinematics Flashcards

1
Q

The arthrology components of the shoulder

A

Acromioclavicular (AC)- functional and anatomical
Sternoclavicular (SC)- functional and anatomical
Scapularthoracic (ST)- functional
Glenoidhumeral- functional and anatomical

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2
Q

Osteokinematic motions of ST joint

A

Elevation/depression
Retraction/protraction
Upward rotation/ downward rotation

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3
Q

SC joint, which done is moving?

A

Clavicle- not sternum

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4
Q

SC- osteokinematics, degrees of freedom, and planes for each motion

A

3 degrees of freedom
elevation/depression- frontal plane
protraction/retraction- horizontal plane
anterior/posterior rotation- sagittal plane

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5
Q

SC- Location and direction of axis for each motion

A
  • Elevation/depression: anterior/posterior on the convex part of sternum
  • Protraction/retraction: vertical axis on the convex part of sternum
  • Anterior/posterior rotation: medial/later axis located along the clavicle
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6
Q

SC- arthrokinematics of each osteokinematic motion

A
  • Elevation/depression: convex-on concave, roll and slide opposite
  • Protraction/retraction: concave-on-convex, roll and slide same
  • Anterior/posterior rotation: spin
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7
Q

AC joint, which bone is moving?

A

Scapula

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8
Q

AC- Osteokinematics, degrees of freedom, and planes for each motion

A

3 degrees of freedom
Upward/downward rotation: frontal plane
Internal/external rotation: horizontal plane
Anterior/posterior tilting: sagittal plane

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9
Q

AC- Location and direction of axis for each motion

A

-Upward/downward rotation: A/P
-Internal/external rotation: vertical
-Anterior/posterior tilting: M/L
Location of axis isn’t important because it is different on everyone

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10
Q

Primary function of AC joint in regards to ST joint?

A

Allow scapula to move in 3 dimensions and increases upper extremity motion. Allows scapula to remain congruent with humerus and permits it to maintain a stable base

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11
Q

Shoulder shrug
Shoulder protraction
Shoulder abduction

A

SC elevation and AC downward rotation
SC protraction and AC internal rotation
ST elevation, SC elevation, and AC upward rotation

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12
Q

Ultimate function of scapular motion

A
  1. Orient the glenoid for optimum contact for humeral head. 2. Add ROM to elevation of arm (hand over head, nonspecific). 3. Provide stable base for humerus.
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13
Q

Neutral position for glenoid fossa

A

Mostly lateral, slightly anterior and slightly superior. In some cases

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14
Q

Neutral position for humeral head

A

Not just opposite.

Medially, slightly superior and a little posterior

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15
Q

Components of static stabilization of GHJ

A

Coracohumeral ligament, supraspinatus, superior capsule. Also, negative pressure.

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16
Q

GHJ- osteokinematic motions, degrees of freedom, and plans of motion

A

3 degrees of freedom.
Flexion/Extension- Sagittal
Abduction/Adduction- Frontal
Internal/External Rotation- Horizontal

17
Q

GHJ- direction and location of axis for each motion

A

Flexion/extension- M/L
Abduction/Adduction- A/P
Internal/External Rotation- Vertical
All through the center of the humeral head

18
Q

GHJ- arthrokinematics of each osteokinematic motion

A

Flexion/extension- Convex-on-concave: opposite
Abduction/Adduction- Convex-on-concave: opposite
Internal/External Rotation- Convex-on-concave: spin

19
Q

What happens to humeral head during arm elevation?

A

The humeral head goes slightly up and surface of joint goes down, meaning there is a little more role than slide

20
Q

Total ROM at shoulder with abduction and flexion?

A

180 degrees

21
Q

Ratio of GH to ST joint motion?

A 
GH= 120 degrees
ST= 60 degrees
22
Q

Scapular humeral rhythm

A

quarantined movement of scapula and humerus at the same time

23
Q

Joint motions for early phase, 90 degrees of flexion/abduction

A
  • 60 degrees from GHJ

- 30 degrees from ST joint: primarly AC upward rotation, little from SC elevation

24
Q

Joint motion for late phase, 90 degrees for flexion/abduction

A
  • 60 degrees from GHJ

- 30 degrees from ST joint: little from AC upward rotation, primarily SC elevation

25
Q

6 kinematic principles during shoulder abduction

A
  1. Scapulohumeral rhythm 2:1 for total 180 degrees. 120 from GHJ and 60 from ST joint
  2. 60 degrees from scapular upward rotation from combined SC and AC joint motion
  3. Clavicle retracts at SC joint
  4. Scapula posteriorly tilts and externally rotates
  5. Clavicle posteriorly rotates (late phase)
  6. GHJ externally rotates

Kinesiology (4 decks)

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