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Gross Anatomy 1 > A.O.I.N.s of Superficial Back, Scapular Region, & Posterior Arm > Flashcards

A.O.I.N.s of Superficial Back, Scapular Region, & Posterior Arm Flashcards

1
Q

What does the term “Origin” mean?

A

The immobile region of muscle attachment

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2
Q

What does the term “Insertion” mean?

A

The mobile region of muscle attachment

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3
Q

What is the point of origin for the Trapezius?

A
  1. Superior nuchal line
  2. External occipital protuberance
  3. Ligamentum Nuchae
  4. Spines of the thoracic vertebrae
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4
Q

What is the point of insertion for the trapezius?

A
  1. Clavicle
  2. Acromion Process
  3. Spine of the Scapula
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5
Q

What is the action of the Trapezius?

A
  1. Stabilizes the scapula
  2. Elevates the scapula (the upper part of the trapezius stabilizes it)
  3. Adducts and depresses the scapula (the middle and lower parts of the trapezius)
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6
Q

What nerve(s) innervate the trapezius?

A

Motor Innervation - C.N. 11/Spinal Accessory Nerve

Sensory Innervation: C.N. 3 & 4

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7
Q

What is the point of origin for the rhomboid major?

A

Spines of the upper thoracic vertebrae

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8
Q

What is the point of insertion for the rhomboid major?

A

Medial/Vertebral border of the scapula

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9
Q

What is the action of the rhomboid major?

A
  1. Elevates the scapula
  2. Adducts the scapula
  3. Stabilize the scapula
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10
Q

What nerve(s) inserts the rhomboid major?

A

Dorsal Scapular Nerve/C5

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11
Q

What is the point of origin for the rhomboid minor?

A

Spines of the lower cervical vertebrae and the first thoracic vertebrae

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12
Q

What is the point of insertion for the rhomboid minor?

A

Medial/Vertebral border of the scapula

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13
Q

What is the action of the rhomboid minor?

A
  1. Elevates the scapula
  2. Adducts the scapula
  3. Stabilizes the scapula
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14
Q

What nerve(s) innervate the rhomboid minor?

A

Dorsal Scapular Nerve/C5

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15
Q

Origin of the Levator Scapula?

A

The transverse processes of the upper cervical vertebrae

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16
Q

Insertion of the Levator Scapula?

A

Superior angle of the scapula

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17
Q

What is the action of the Levator Scapula?

A
  1. Elevate the scapula
  2. Adducts the scapula
  3. Stabilizes the scapula
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18
Q

What nerve(s) innervate the Levator Scapula?

A

Dorsal Scapular Nerve/C5

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19
Q

What is the origin of the latissimus dorsi?

A
  1. Spines of the lower thoracic and lumbar vertebrae
  2. Thoracodorsal Fascia
  3. Crest of the ilium
  4. Lower ribs
20
Q

What is the point of insertion for the latissimus dorsi?

A

Intertubercular groove/lesser tubercule of the humerus

21
Q

What is the action of the latissimus dorsi?

A
  1. Extends, adducts, & medially rotates the humerus
  2. Forced expiration
22
Q

What nerve(s) innervates the latissimus dorsi?

A

Thoracodorsal nerve/C6, C7, C8

23
Q

Origin of Pectoralis Major?

A
  1. Clavicle
  2. Sternum & upper ribs
  3. External & oblique muscles
24
Q

Insertion of pectoralis major?

A

Greater tuberosity of the humerus

25
Q

Action of pectoralis major?

A
  1. Adducts & medially rotates the humerus
  2. Forded inspiration

Clavicular Portion: Flexes the humerus at the shoulder joint

Sternocostal Portion: Extends the humerus at the shoulder joint

26
Q

Nerve innervation of the Pectoralis Minor?

A

Medial and Lateral pectoral nerves/ C8-T1 & C5-C7

27
Q

Origin of pectoralis minor?

A

Ribs 3-5

28
Q

Insertion of pectoralis minor?

A

Coracoid process of the scapula

29
Q

Actions of the pectoralis minor?

A
  1. Abducts the scapula
  2. Forced inspiration
30
Q

Nerve supply of pectoralis minor?

A

Medial Pectoral nerve

31
Q

Origin of subclavius?

A

First rib

32
Q

Insertion of subclavius?

A

Subclavian groove of the clavicle

33
Q

Actions of the subclavius?

A
  1. Pulls the clavicle medially
  2. Protects clavicle and subclavian blood vessels
34
Q

Nerve supply to subclavius?

A

Subclavian nerve/C5-C6

35
Q

Origin of serratus anterior?

A

Upper 8 or 9 ribs

36
Q

Insertion of serratus anterior?

A

Medial/vertebral border of the scapula

37
Q

Actions of serratus anterior?

A
  1. Abducts the scapula
  2. Stabilizes the scapula
38
Q

Nerve supply of serratus anterior?

A

Long thoracic/C5, C6, C7

39
Q

Origin of the deltoid muscle?

A
  1. Clavicle
  2. Acromion process
  3. Spine of the scapula
40
Q

Insertion of deltoid?

A

Deltoid tuberosity of the humerus

41
Q

Actions of the deltoid?

A

Anterior Portion: Flexes and medially rotates the humerus

Middle portion: Abducts the humerus

Posterior Portion: Extends & Laterally rotates the humerus

42
Q

Nerve supply of deltoid?

A

Axillary Nerve/C5, C6

43
Q

Origin of supraspinatous?

A

Supraspinatous fossa of the scapula

44
Q

Insertion of supraspinatous?

A

Greater tuberosity of the humerus

45
Q

Actions of supraspinatous?

A
  1. Abducts the humerus
  2. Laterally rotates the humerus
  3. Stabilizes the shoulder joint
46
Q

Nerve supply to supraspinatous?

A

Suprascapular nerve/C5 & C6

Gross Anatomy 1 (10 decks)

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