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AOIs > Suboccipital/Thorax/Shoulder/Whole Arm > Flashcards

Suboccipital/Thorax/Shoulder/Whole Arm Flashcards

1
Q

Pectoralis Major

A

Origin:
[Clavicular head]
-anterior surface of medial 1/2 of clavicle

[Sternocostal head]

  • anterior surface of sternum
  • superior 6 costal cartilages
  • aponeurosis of external oblique muscles

Insertion:
-Lateral lip of intertubercular sulcus of humerus

Action:
-Adducts/medially rotates humerus

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2
Q

Pectoralis Minor

A

Origin:
-3rd-5th ribs near costal cartilages

Insertion:
-Medial border/superior surface of coracoid process of scapula

Action:

  • Stabilizes scapula by drawing it inferiorly/anteriorly against thoracic wall
  • Assists in elevating ribs for deep inspiration

**forms a significant surgical/anatomical landmark as a bridge above vessels and nerves

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3
Q

Subclavius

A

Origin:
-Junctions of 1st rib + its costal cartilage

Insertion:
-Inferior surface of middle 1/3 of clavicle

Action:
-Anchors/depresses clavicle

**protects subclavian vessels/superior trunk of brachial plexus from clavicular fractures

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4
Q

Serratus Anterior

A

Origin:
-External surfaces of lateral parts of 1st-8th ribs

Insertion:
-Anterior surface of medial border of scapula

Action:

  • Holds scapula against thoracic wall when doing push-ups/pushing against resistance
  • Anchors/fixes scapula for humeral movement
  • Rotates scapula to elevate glenoid cavity for raising arm above shoulder
  • Protracts scapula when punching/reaching anteriorly
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5
Q

Rotator Cuff?

A

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

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6
Q

Supraspinatus

A

Origin:
-Supraspinatus fossa of scapula

Insertion:
-Superior facet of greater tubercle of humerus

Action:

  • Initiate/assist deltoid to abduct arm
  • Works with other rotator cuff muscles
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7
Q

Infraspinatus

A

Origin:
-Medial 3/4 of infraspinous fossa

Insertion:
-Middle facet of greater tubercle of humerus

Action:

  • Laterally rotates arm
  • Works with other rotator cuff muscles
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8
Q

Teres Minor

A

Origin:
-Middle part of lateral border of scapula

Insertion:
-Inferior facet of greater tubercle of humerus

Action:

  • Laterally rotates arm
  • Works with other rotator cuff muscles
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9
Q

Subscapularis

A

Origin:
-Subscapular fossa

Insertion:
-Lesser tubercle of humerus

Action:

  • Medially rotates/adducts arm
  • Works with other rotator cuff muscles
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10
Q

Teres Major

A

Origin:
-Posterior surface of inferior angle of scapula

Insertion:
-Medial lip of intertubercular sulcus of humerus

Action:

  • Medially rotates/adducts arm
  • Assists arm extension from flexed position
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11
Q

Deltoid

A

Origin:
-Lateral 1/3 of clavicle & acromion/spine of scapula

Insertion:
-Deltoid tuberosity of humerus

Action:
[Clavicular Head]
-flexes/medially rotates arm

[Acromial Head]
-abducts arm

[Spinal Head]
-extends/laterally rotates arm

[Together]

  • Abducts arm
  • Stabilizes inferior displacement of humeral head from glenoid cavity
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12
Q

During the first 15 degrees of arm ____________, the deltoid is assisted by the _________________.

A

(1) Abduction

(2) Supraspinatus

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13
Q

Biceps Brachii

Name AOI + which 3 joints it crosses

A

Origin:
[Short Head]
-Tip of coracoid process

[Long Head]
-supraglenoid of tubercle of scapula

Insertion:

  • Tuberosity of radius
  • Forearm via bicipital aponeurosis

Action:

  • Forearm flexion/supination
  • (short head) Stabilizes GH joint/resists shoulder dislocation
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14
Q

Brachialis

A

Origin:
-Distal half of anterior humerus

Insertion:
-Coronoid process/tuberosity of ulna

Action:

  • Flexes forearm
  • “Workhorse” of elbow flexors
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15
Q

Coracobrachialis

A

Origin:
-Tip of coracoid process

Insertion:
-Middle 1/3 of medial humerus

Action:

  • Shoulder flexion/adduction
  • Stabilizes GH joint/resists shoulder dislocation
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16
Q

Triceps Brachii

A

Origin:
[Long Head]
-Infraglenoid tubercle of scapula

[Lateral Head]
-Posterior surface of humerus, superior to radial groove

[Medial Head]
-Posterior surface of humerus, inferior to radial groove

Insertion:

  • Proximal end of olecranon
  • Fascia of forearm

Action:

  • Elbow extension
  • Long head stabilizes GH joint and assists in shoulder extension/adduction
17
Q

Anconeus

A

Origin:
-Lateral epicondyle of humerus

Insertion:

  • Lateral surface of olecranon
  • Superior part of posterior surface of ulna

Action:
-Elbow extension/stabilization

18
Q

External Intercostal

A

Origin:
-Superior to inferior border of the ribs

Insertion:
-Fibers run inferoanteriorly to rib below

Action:
-Assist with inspiration

19
Q

Internal Intercostal

A

Origin:
-Inferior border of rib

Insertion:
-Fibers run inferposteriorly to rib below

Action:
-Assist with expiration

20
Q

Sternocleidomastoid

A

Origin:

  • Lateral surface of mastoid process
  • Lateral 1/2 of superior nuchal line

Insertion:
[Sternal head]
-Anterior surface of manubrium

[Clavicular head]
-Superior surface of medial 1/3 of clavicle

Action:
[Unilateral]
-Lateral flexion/upward rotation of head

[Bilateral]

  • Neck extension; flexion so chin approaches manubrium
  • Simultaneous flexion/extension to thrust chin forward
21
Q

Innermost Intercostals

A

Origin:
-Deep to internal intercostals

Insertion:
-Adjacent ribs on inferior surface

Action:
-Assist with expiration

22
Q

Subcostals

more prevalent in lower ribs

A

Origin:
-Internal inferior surfaces of lower ribs near angles

Insertion:
-Superior borders of 2-3 ribs below

Action:
-Blend with internals to assist with expiration

23
Q

Brachioradialis

A

Origin:
-Proximal 2/3 of supraepicondylar ridge (lateral side)

Insertion:
-Lateral surface of distal radius

Action:
-Forearm flexion (weak when supinated, max when mid-pronated)

24
Q

Supinator

A

Origin:

  • Lateral epicondyle of humerus
  • Posterior border of ulna

Insertion:
-Lateral/posterior/anterior surfaces of proximal 1/3 of radius

Action:
-Supinates forearm

25
Q

Pronator teres

A

Origin:

  • Coronoid process
  • Medial epicondyle of humerus

Insertion:
-lateral surface of radius

Action:
-Pronates/flexes forearm

26
Q

Pronator quadratus

A

Origin:
-Distal 1/4 of anterior surface of ulna

Insertion:
-Distal 1/4 of anterior surface of radius

Action:

  • Pronates forearm
  • Binds radius/ulna together
27
Q

Extensor carpi ulnaris

A

Origin:
-Lateral epicondyle of humerus

Insertion:
-Dorsal base of 5th metacarpal

Action:
-extends/adducts hand

28
Q

Extensor carpi radialis

A

Origin:
[Brevis]
-Lateral epicondyle of humerus

[Longus]
-Lateral supracondylar ridge of humerus

Insertion:
[Brevis]
-Dorsal base of 3rd metacarpal

[Longus]
-Dorsal base of 2nd metacarpal

Action:

  • Extend/abduct hand
  • [Longus] fist clenching
29
Q

Extensor digitorum

A

Origin:
-Lateral epicondyle of humerus

Insertion:
-Extensor expansions of medial 4 digits

Action:
-Extends medial 4 digits

30
Q

Extensor digiti minimi

A

Origin:
-Lateral epicondyle of humerus

Insertion:
-Extensor expansion of 5th digit

Action:
-Extends 5th digit

31
Q

Flexor carpi ulnaris

A

Origin:
-Medial epicondyle of humerus

Insertion:

  • Pisiform
  • Hook of Hamate
  • 5th metacarpal

Action:
-Flexes/adducts hand

32
Q

Flexor carpi radialis

A

Origin:
-Medial epicondyle of humerus

Insertion:
-Base of 2nd metacarpal

Action:
-Flexes/abducts hand

33
Q

Palmaris longus

A

Origin:
-Medial epicondyle of humerus

Insertion:

  • Distal 1/2 of flexor retinaculum
  • Apex of palmar aponeurosis

Action:

  • Flexes hand
  • Tenses palmar aponeurosis
34
Q

Rectus capitis posterior (major)

A

Origin:
[Major]
-SP of C2

[Minor]
-Posterior tubercle of C1

Insertion:
[Major]
-Lateral inferior nuchal line

[Minor]
-Medial inferior nuchal line

Action:
-Neck flexion/rotation

35
Q

Obliquus capitis

A

Origin:
[Superior]
-TP of C1

[Inferior]
-SP of C2

Insertion:
[Superior]
-Cranium

[Inferior]
-TP of C1

Action:
-Neck flexion/rotation

AOIs (6 decks)

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