Upper Limb 2 Flashcards

1
Q

Axio-Appendicular muscles

A

extrinsic muscles attaching the upper limb to the thorax

Anterior and Posterior

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2
Q

Anterior

A

Pec Major
Pec Minor
Subclavius
Serratus Anterior

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3
Q

Pec Major
O
I
Innervation

A

Clavicular head = anterior medial shaft of clavicle
Sternal head = anterior surface of the sternum
Lateral lip of intertubercular groove
Innervation = medial and lateral pecoral

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4
Q

Action of Pec Major

A

Adducts
Medially rotates
Flexes the humerus
Can extend the humerus from an already flexed position

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5
Q

Pec Minor
O
I
Innervation

A

3rd-5th ribs
Medial border of coracoid
Medial pectoral

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6
Q

Action of Pec Minor

A

Stabilize scapula

Elevates ribs as accessory muscle

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7
Q

Subclavius
O
I
Innervation

A

Junction of first rib and manubrium
Inferior center of the clavicle
Nerve to the subclavius

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8
Q

Action of the subclavius

A

Anchor and depress the clavicle

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9
Q

Serratus Anterior
O
I
Innervation

A

Lateral parts of ribs 1-8
Medial anterior border of scapula
Long thoracic nerve

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10
Q

Action of Serratus Anterior

A

Protract
Rotate
Stabilize scapula on thorax

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11
Q

Posterior

A

Trapezius
Levator Scapulae
Rhomboideus Major and Minor
Latissimus Dorsi

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12
Q

Trapezius
O
I
Innervation

A

Occipital bone, spinous processes of C1-T12
Lateral third of clavicle, acromion, sup border of scapular spine
Accessory (CN XI)

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13
Q

Action of Trapezius

A

Elevates, retracts, rotates, and depresses the scapula

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14
Q

Levator Scapulae
O
I
Innervation

A

Transverse proc of C1 - C4
Sup angle of the scap
Dorsal scap

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15
Q

Action of the levator scapulae

A

elevate the scapula

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16
Q

Rhomboid Major
O
I
Innervation

A

Spinous processes of T1-T4
Medial border of scapula below scapular line
Dorsal scap

17
Q

Rhomboid Minor
O
I
Innervation

A

Spinous processes C6 and C7
Medial border of scapula above scapular line
Dorsal scap

18
Q

Action of rhomboids

A

Retract and elevate scapula

19
Q

Latissimus Dorsi
O
I
Innervation

A

Spinous processes of T7-T12, thoracolumbar fascia, iliac crest
Floor of intertubercular groove
Thoracodorsal

20
Q

Action of Lat

A

Adduct
Extend
Medially rotate humerus

21
Q

Scapulohumeral Muscles

A

Intrinsic muscles connecting scapula to humerus

22
Q

Deltoid
O
I
Innervation

A

Lateral third of the clavicle, acromion, scapular spine
Deltoid tuberosity
Axillary nerve

23
Q

Deltoid Action

A

Anterior part flexes and medially rotates arm
Medial part abducts arm
Posterior part extends and laterally rotates the arm

24
Q

Teres Major
O
I
Innervation

A

Post surface of inferior angle of scapula
Medial lip of inertubercular groove
Lower subscapular

25
Q

Teres Major Action

A

Adduction

Medial rotation of arm

26
Q

Rotator Cuff

A

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

27
Q

Supraspinatus
O
I
Innervation

A

Supraspinous Fossa (of scapula)
Greater tubercle of humerus (sup aspect)
Suprascapular nerve

28
Q

Action of Supraspinatus

A

Initiate abduction

Stabilize glenohumeral joint

29
Q

Infraspinatus
O
I
Innervation

A

Infraspinous Foss (of scapula)
Greater tubercle of humerus
Suprascapular nerve

30
Q

Action of infraspinatus

A

Lateral rotation

Stabilize glenohumeral joint

31
Q

Teres Minor
O
I
Innervation

A

Lateral border of scapula
Greater tubercle of humerus
Axillary

32
Q

Teres Minor Action

A

Lateral rotation

Stabilize glenohumeral joint

33
Q

Subscapularis
O
I
Innervation

A

Subscapular fossa
Lesser tubercle of humerus
Upper and Lower Subscapular nerves

34
Q

Subscapularis Action

A

Medial Rotation

Stabilizes glenohumeral joint

35
Q

Triangular Space Borders

A
Lateral = long head of triceps
Superior = Teres Minor
Inferior = Teres Major
36
Q

What does the triangular space contain>

A

Scapular circumflex artery

37
Q

Quadrangular Space Borders

A
Lateral = humerus
Medial = long head triceps
Superior = Teres Minor
Inferior = Teres Major
38
Q

Contents of Quadrangular Space

A

Axillary nerve and posterior humeral circumflex artery

39
Q

Clinical Applications - fracture of surgical neck of humerus –>

A

Can damage contents of quadrangular space including axillary nerve and post humeral circumflex artery
- Severance of axillary artery would lead to paralysis and eventually atrophy of deltoid and teres major