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MSK_Y1_MT1 > MSK_MT1_TBL7 (Shoulder Axilla & Arm) > Flashcards

MSK_MT1_TBL7 (Shoulder Axilla & Arm) Flashcards

1
Q

Subclavis Origin

A

1st rib and 1st costal cartilage

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2
Q

Subclavius Insertion

A
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3
Q

Subclavius Actions

A
  • Stabilizes clavicle
  • Depresses clavicle
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4
Q

Subclavius Innervation

A

subclavian nerve

(C5-C6)

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5
Q

Deltoid Origin

A
  1. Lateral 1/3 of clavicle
  2. Acromion of scapula
  3. Spine of scapula
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6
Q

Deltoid Insertion

A

Deltoid tuberosity of humerus

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7
Q

Deltoid Action

A
  1. Abducts the arm
  2. Flexes the arm
  3. Extends the arm
  4. Laterally rotations
  5. Medially rotations the arm
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8
Q

Deltoid Innervation

A

Axillary nerve

(C5-C6)

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9
Q

Supraspinatus Origin

A

Supraspinous fossa of scapula

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10
Q

Supraspinatus Insertion

A

Greater tubercle of humerus

*Stabilizes shoulder muscle - rotator cuff muscle

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11
Q

Supraspinatus Action

A

*Stabilizes shoulder muscle - rotator cuff muscle

Initation abduction of arm (15%)

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12
Q

Supraspinatus Innervation

A

Suprascapular nerve

(C5, C6)

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13
Q

Infraspinatus Origin

A

Infraspinous fossa of scapula

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14
Q

Infraspinatus Insertion

A

Greater tubercle of humerus

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15
Q

Infraspinatus Action

A

*Stabilizes shoulder muscle - rotator cuff muscle

lateral rotation of arm

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16
Q

Infraspinatus Innervation

A

Suprascapular nerve

(C5, C6)

17
Q

Subscapularis Origin

A

Subscapular fossa of scapula

18
Q

Subscapularis Insertion

A

Lesser tubercle of humerus

19
Q

Subscapularis Action

A

*Stabilizes shoulder muscle - rotator cuff muscle

medial rotation of arm

20
Q

Subscapularis Innervation

A

Subscapular nerve

(C5, C6, C7)

21
Q

Teres major Origin

22
Q

Quadrangular Space

A

axillary space in the arm: helps the axillia “communicate” with the posterior side

important things in the space: posterior humeral circumflex artery + axiallary nerve

23
Q

Quadrangular Space Boarders

A

Superior: Teres MINOR

Inferior: Teres major

Medial: Triceps (long head)

Lateral: Humorous Bone (surgical neck)

Trauma = axillary nerve weakness = weakness of the deltoid muscle

24
Q

Triangular Space

A

the circumflex scapular artery passes through it

located medial to the quadrangular space

trauma = shoulder dysfunction, particularly with arm abduction and external rotation,

25
Q

Triangular Space Borders

A

Superior: Teres Minor

Inferior: Teres Major

Lateral: Tricep (long head)

structures: circumflex scapular artery

26
Q

Trinangular Interval

A

important sturctures: radial nerve & profunda brachii artery

located inferior to the quadrangular space

trauma = trouble with abduction and external rotation and radial finger numbness

27
Q

Triangular Interval Boarders

A

superior: teres major

Lateral: lateral head of the triceps or the humerus

Medial: long head of the triceps

28
Q

scapular anastomosis

A

connects subclavian artery to corresponding axillary artery

= circulatory** **anastomosis around the scapula. (allows blood to flow past the joint in case of occlusion, damage, or pinching )

29
Q

Cubital fossa

A

triangle located at elbow joint (anterior side)

contains Median cubital vein ( helps facilitate drainage between the basilic and cephalic veins)

30
Q

Cubital fossa Boarders

A

Medially: pronator teres

Laterally: brachioradialis

Top: line connecting medial and lateral epicondyles of humerus

31
Q

Pneumonic for contents of Cubital Fossa

A

Really Need (radial nerve)

Beer To (biceps tendon)

Be At (brachial artery)

My Nicest (median nerve).

32
Q

Musles that help with lateral rotation of arm

A
  1. Deltoid
  2. Infraspinatus (Rotator Cuff Muscle) of scapula
  3. Teres Minor (Rotator Cuff Muscle) of scapula
33
Q

Musles that help with medial rotation of arm

A
  1. SUBscapularis (Rotator Cuff Muscle) of ANTERIOR scapula
  2. Teres Major
  3. Deltoid
34
Q

Musles that help with abduction of arm

A
  1. deltoid
  2. Supraspinatus ((Rotator Cuff Muscle) of scapula (first 15%)
35
Q

Supraspinatus Tendon Rupture

A
  • During abduction, supraspinatus tendon friction with acromion
  • normally friction is reduced by subacromial bursa

In Supraspinatus tendinitis = tendon rupture or calcification = NO ABDUCTION

the deltoid muscle compensates

36
Q

Adhesive Capsulitis

A

frozen shoulder: 50-60 y.o women most likely, Type 1 diabetics too

  1. severe shoulder pain and increasing stiffness.
  2. loss of shoulder motion, BUT less pain
  3. recovery phase that takes from 5 to 24 months.
37
Q

Musculotaneous Nerve Supplies

A

anterior compartment of the upper arm + LATERAL SENSATION

  1. Bicheps Brachii
  2. Brachialis
  3. Coracobrachialis
38
Q

Radial Nerve Supplies

A

Triceps (posterior part of arm), brachioradialis, extensor carpi radialis longus

in trauma, extension of the wrist and arm will be effected, supination effected

“drop wrist”

39
Q

Musles that help with aDDuction of arm

A
  1. Teres Major
  2. Coracobrachialis (shoulder)

MSK_Y1_MT1 (13 decks)

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