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Muscles Anatomy > Shoulder/Arm > Flashcards

Shoulder/Arm Flashcards

1
Q

Origin & Insertion of the Deltoid

A

Origin:
-Lateral 1/3 of the clavicle
- Acromion
- Spine of scapula
Insertion:
Deltoid tuberosity

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2
Q

Actions of the deltoid

A

all fibers:
- abduct the shoulders
Anterior Fibers:
- Flex the shoulder
- Medially rotate the shoulder
- Horizontally adduct the shoulder
Posterior Fibers:
- Extend the shoulder
- Laterally rotate the shoulder
- Horizontally abduct the shoulder

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3
Q

Nerve of the deltoid

A

Axillary C5,6

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4
Q

Origin & Insertion of the Trapezius

A

Origin:
-bump of knowledge (EOP)
-Medial portion of superior nuchal line of the occiput
- ligamentum nuchae
- SP C7- T12
Insertion:
- Lateral 1/3 of the clavicle
- Acromion
- Spine of the Scapula

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5
Q

Actions of the Trapezius

A

Upper Fibers
Unilaterally:
- laterally flex head/neck to the same side
- Rotate head/neck to the opposite side
- Elevates the Scapula
- upwardly rotate the scapula
Bilaterally:
Extend the head/neck

Middle Fibers
Adduct the scapula
Stabilize the scapula

Lower Fibers
Depress the scapula
Upwardly rotate the scapula

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6
Q

Nerve of the Trapezius

A

Spinal portion of cranial nerve XI
ventral ramus C2,3,4

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7
Q

Origin & Insertion of Latissimus Dorsi

A

Origin:
-Inferior angle of the scapula
-SP of last 6 thoracic vertebrae
-Last 3 or 4 ribs
-Thoracolumbar fascia
- Posterior iliac crest
Insertion:
intertubercular groove of the humerus

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8
Q

Action of Latissimus Dorsi

A

Extend the shoulder
Adduct the shoulder
Medially rotate the shoulder

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9
Q

Nerve of Latissimus Dorsi

A

Thoracodorsal C6,7,8

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10
Q

Origin & Insertion of Teres Major

A

Origin:
- Inferior angle of the scapula
- lower 1/3 of lateral border of the scapula
Insertion:
Crest of the lesser tubercle of the humerus

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11
Q

Action of Teres Major

A

Extend the shoulder
Adduct the shoulder
Medially rotate the shoulder

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12
Q

Nerve of Teres Major

A

Lower subscapular C5,6,7

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13
Q

Origin & Insertion of Supraspinatus

A

Origin:
- Supraspinatus fossa of the scapula
Insertion:
Greater tubercle of the humerus

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14
Q

Action of Supraspinatus

A

Abduct the shoulder
Stabilize the head of the humerus

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15
Q

Nerve of Supraspinatus

A

Suprascapular C4,5,6

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16
Q

Origin & Insertion of the Infraspinatus

A

Origin:
Infraspinatus fossa of the scapula
Insertion:
Greater tubercle of the humerus

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17
Q

Action of Infraspinatus

A

Laterally rotate the shoulder
Adduct the shoulder
Stabilize the head of the humerus in glenoid cavity

18
Q

Nerve of Infraspinatus

A

Suprascapular C4,5,6

19
Q

Origin & Insertion of Teres Minor

A

Origin:
- Upper 2/3 of lateral border of scapula
Insertion:
Greater tubercle of the humerus

20
Q

Action of Teres Minor

A

Laterally rotate the shoulder
Adduct the shoulder
Stabilize the head of the humerus in glenoid cavity

21
Q

Nerve of Teres Minor

A

Axillary C5,6

22
Q

Origin & Insertion of Subscapularis

A

Origin:
- Subscapular fossa of the scapula
Insertion:
Lesser tubercle of the humerus

23
Q

Action of Subscapularis

A

Medially rotate the shoulder
Stabilize the head of the humerus in the glenoid cavity

24
Q

Nerve of Subscapularis

A

Upper and Lower subscapular C5,6,7

25
Q

Origin & Insertion of Rhomboid Major

A

Origin:
- SP T2-T5
Insertion:
- Medial border of the scapula
- between the spine of the scapula and inferior angle

26
Q

Action of Rhomboid Major

A

Adduct the scapula
Elevate the scapula
Downwardly rotate the scapula

27
Q

Nerve of Rhomboid Major

A

Dorsal Scapular C4,5

28
Q

Origin & Insertion of Rhomboid Minor

A

Origin :
- SP C7 & T1
Insertion:
- Upper portion of medial border of the scapula across from the spine of the scapula

29
Q

Action of Rhomboid Minor

A

Adduct the scapula
Elevate the scapula
Downwardly rotate the scapula

30
Q

Nerve of Rhomboid Minor

A

Dorsal Scapular C4,5

31
Q

Origin & Insertion of Levator Scapula

A

Origin:
TVP 1st-4th cervical vertebrae
Insertion:
- Medial border of the scapula
- between superior angle and superior portion of the spine of scapula

32
Q

Action of Levator Scapula

A

Unilaterally:
- Elevate the scapula
- downwardly rotate the scapula
- laterally flex the head and neck
- rotate the head/neck same side
Bilaterally:
Extend the head/neck

33
Q

Nerve of Levator Scapula

A

Cervical 3,4
Dorsal scapular C4,5

34
Q

Origin & Insertion of Serratus Anterior

A

Origin:
External surface of upper 8 or 9 ribs
Insertions:
Anterior surface of medial border of the scapula

35
Q

Actions of Serratus Anterior

A

With origin fix:
-Abduct the scapula
- Upwardly rotate the scapula
- Depress the scapula
- hold the medial border of the scapula against the rib cage
With the scapula fixed:
Elevates the thorax during forced inhalation

36
Q

Nerve of Serratus Anterior

A

Long thoracic C5-8

37
Q

Origin & Insertion of Pectoralis Major

A

Origin:
- Medial half of clavicle
- Sternum
- Cartilage 1st-6 ribs
Insertions:
Crest of greater tubercle of humerus

38
Q

Actions of Pectoralis Major

A

All fibers:
-Adduct the shoulder
- Medially rotate the shoulder
- Assist to elevate the thorax during forced inhalation
Upper fibers:
-Flex the shoulder
- Horizontally adduct the shoulder
Lower fibers:
Extend the shoulders

39
Q

Nerves of Pec Major

A

Upper fibers:
Lateral pectoral C5-7
Lower fibers:
Lateral and medial pectoral C6-8, T1

40
Q

Origin & Insertion of Pec Minor

A

Origin:
3,4,5th ribs
Insertions:
Medial surface of coracoid process of the scapula

41
Q

Actions of Pec Minor

A

Depress the scapula
Abduct the scapula
Downwardly rotate the scapula
•with the scapula fixed
Assist to elevate the thorax during forced inhalation

42
Q

Nerves of Pec Minor

A

Medial pectoral
Fibers from a communicating branch of the lateral pectoral C6-8 , T1

Muscles Anatomy (5 decks)

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