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Upper Limb > Shoulder Joint > Flashcards

Shoulder Joint Flashcards

1
Q

Deltoid

A

O: Lateral third of clavicle; acromion & spine of scap
I: Deltoid tuberosity of humerus

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2
Q

Deltoid - Innovation & Action

A

Innovation: Axillary Nerve (C5/6)
Action:
Anterior part - Flexes & medially rotates
Middle part - Abducts arm
Posterior Part - Extends & Laterally Rotates

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3
Q

Supraspinatus

A

O: Supraspinous fossa of scap
I: Sup facet of greater tubercle of humerus

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4
Q

Supraspinatus - Action & innervation

A 
Action: Initiates & assists deltoid in abduction of arm & acts with rotator cuff muscles
Innervation:
Suprascapular N (C4/5/6)
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5
Q

Infraspinatus

A

O: Infraspinous fossa of scap
I: Middle focet of greater tubercle of humerus

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6
Q

Infraspinatus - Action & Innervation

A

A: Laterally Rotates arm; Helps to hold humeral head in glenoid cavity
Innervation: Suprascapular N (C5/6)

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7
Q

Teres Minor

A

O: Middle part of lateral border of scap
I: Inferior facet of greater tubercle of humerus

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8
Q

Teres Minor - Action & Innervation

A

Action: Lat rotate arm, help hold humeral head in glenoid cavity of scap
Innervation: Axillary N (C5/6)

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9
Q

Subscapularis

A

O: Subscapular fossa (most anterior surface of scap)
I: Lesser tubercle of humerus

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10
Q

Subscapularis - Action & Innervation

A

Action: Medially rotate & adduct arm; Helps to hold humeral head in glenoid cavity
Innervation: Upper & Lower subscapular N (C5/6/7)

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11
Q

Teres Major

A

O: Posterior surface of inferior angle of scap
I: Medial Lip of interubercular groove of humerus

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12
Q

Teres Major - Action & Innervation

A

Action: Adducts & medially rotates arm
Innovation: Lower Scap N (C5/6)

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13
Q

Coracobrachialis

A

O: Tip of coracoid process of scap
I: middle third of medial surface of humerus

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14
Q

Coracobrachialis - Action & Innervation

A

Action: Helps flex & adducts arm; resists dislocation of shoulder
Innervation: Musculocutaneus N (C5/6/7)

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15
Q

Pectoralis Major

A

O:
Clavicular Head - Anterior surface of medial half of clavicle
Sternal Head - Anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique muscles
I: Lateral lip of intertubercular groove of humerus

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16
Q

Pectoralis Major - Action & Innervation

A

Action: Adducts & medially rotates humerus, draws scap anteriorly and inferiorly
clavicular head = flexes humerus
sternal head = extends humerus from flexed position

Innervation: Lateral & medial pectoral N
Clavicular Head (C5/6), Sternal head (C7/8/T1)
17
Q

Latissimus Dorsi

A

O: Spinous process of inferior 6 vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs
I: floor of intertubecular groove of humerus

18
Q

Latissimus Dorsi - Action & Innervation

A

Action: Extends, adducts & medially/internally rotates the humerus - raises body towards arms
Innervation: Thoracodorsal N (C6/7/8)

19
Q

Serratus Anterior

A

O: external surface of lat parts of 1-8 ribs
I: An surface of medial border of scap

20
Q

Serratus Anterior - Action & Innervation

A

A: Protracts scap, holds in against thoracic wall, rotates
I: long thoracic Nerve (C5-7)

21
Q

Pectoralis Minor

A

O: 3-5th ribs near costal cartilages
I: medial border & sup surface of coracoid process of scap

22
Q

Pectoralis Minor - Action & Innervation

A

A: stabilises scap by drawing it inf and ant against thoracic wall
Ant Tilt
I: Medial Pectorial N

23
Q

Rhomboids Major & Minor

A

Major:
O: spinous process of t2-t5
I: medial border of scap from spine to inferior angle
Minor:
O: nuchal lig, spinous process of c7-t1
I: smooth triangular area at medial end of scap spine

24
Q

Rhomboids - Action & Innervation

A

A: retracts scap, inferiorly rot
I: dorsal scap n

25
Q

Levator scapulae

A

O: Post tubercles of transverse process of c1-c4
I: medial border of scap sup to root of spine

26
Q

Levator Scapulae

A

A: elevates scap, tilts glenoid cavity inferiorly
I: dorsal scap nerve & Cervical N

27
Q

Trapezius

A 
Upper: 
O: medial third of sup nuchal line
I: Clavicle
Middle: 
O: External occipital protuberance
I: acromion & spine of scap
Lower:
O: nuchal lig, spinous process of C7-T12
I: Medial Part of spine of scap
28
Q

Trapezius - Action & Innervation

A 
Action
Upper: elevates
Middle: Retracts
Lower: Depress & upwardly rotate scap
Innervation: Accessory N & 11th cranial N

Upper Limb (6 decks)

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