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Set 1 Flashcards

1
Q

Sternocleidomastoid (SCM)

Innervation

A

CN XI (SA nv.) + C2-3

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2
Q

SCM

Primary Open Chain Action

A

Both working together: flexion of the cervical spine

Individual muscle working alone: rotation of head to opposite side

PRIMARY NECK FLEXOR**

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3
Q

SCM

Secondary Open Chain Action

A

Ipsilateral lateral flexion (side bending)

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4
Q

Scalenes (ant., middle, post.)

Innervation

A

Cervical nerves VPR C1-8

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5
Q

Scalenes (ant., middle, post.)

Primary Open Chain Action

A

Ipsilateral flexion and rotation of the neck to opposite side

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6
Q

Scalenes (ant., middle, post.)

Secondary Open Chain Action

A

Neck flexion

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7
Q

Trapezius

Innervation

A

CN XI (SA nv.) + C3,4

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8
Q

Trapezius

Primary Open Chain Action

A

Upper fibers:

  • Scapula elevation, adduction, upward rotation
  • PRIMARY SHOULDER GIRDLE ELEVATOR***

Middle fibers:

  • Scapula adduction
  • PRIMARY SHOULDER GIRDLE RETRACTOR***

Lower fibers:

  • Scapula depression, upward rotation
  • PRIMARY SHOULDER GIRDLE DEPRESSOR***
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9
Q

Trapezius

Secondary Open Chain Action

A

Unilateral:

  • rotation of head to opposite side
  • lateral flexion of head to same side

Bilateral: head and neck extension

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10
Q

Levator Scapulae

Innervation

A

C3,4 + Dorsal Scapular (C5) to lower fibers

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11
Q

Levator Scapulae

Primary Open Chain Action

A

Elevation, adduction, and downward rotation of scapula

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12
Q

Serratus Anterior

Innervation

A

Long Thoracic n. (C5-7)

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13
Q

Serratus Anterior

Primary Open Chain Action

A
  • Scapular abduction (Protraction and upward rotation)

- Holds the medial border of the scapula firmly against the thorax

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14
Q

Serratus Anterior

Secondary Open Chain Action

A
  • Stabilizes the scapula for shoulder muscles

- Scapular depression

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15
Q

Pectoralis Major

Innervation

A

Medial + Lateral Pectoral n. (C5-8T1)

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16
Q

Pectoralis Major

Primary Open Chain Action

A

Clavicular fibers:
-IR, flexion, horizontal adduction

Stern all fibers:

  • Adducts arm toward opposite iliac crest
  • PRIMARY ARM ADDUCTOR***
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17
Q

Pectoralis Major

Secondary Open Chain Action

A
  • Extends arm if flexed

- Depression of the shoulder girdle via the arm

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18
Q

Pectoralis Minor

Innervation

A

Medial Pectoral n. (C8T1)

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20
Q

Pectoralis Minor

Primary Open Chain Action

A
  • Depression of the shoulder girdle

- Scapular downward rotation

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21
Q

Pectoralis Minor

Secondary Open Chain Action

A
  • Fixes scapula against upward movements, depressing tip of shoulder joint
  • Weak shoulder abduction
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22
Q

Deltoideus

Innervation

A

Axillary n. (C5,6)

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23
Q

Deltoideus

Primary Open Chain Action

A

All actions of the arm (shoulder)
Anterior fibers:
-flexion (PRIMARY***)

Middle fibers:
-abduction (PRIMARY***)

Posterior fibers:

  • Horizontal abduction (PRIMARY***)
  • Hyperextension
24
Q

Deltoideus

Secondary Open Chain Action

A

Anterior + middle fibers:
-shoulder “scpation” (arm elevation in the plane of the scapula)

Anterior fibers:

  • from abducted position, horizontal adduction
  • from ER position, IR

Posterior fibers:

  • from flexed position, extension
  • from IR position, ER
25
Q

Coracobrachialis

Innervation

A

Musculocutaneous n. (C6-7)

26
Coracobrachialis | Primary Open Chain Action
Flexion, adduction, horizontal adduction of arm (shoulder)
27
Coracobrachialis | Secondary Open Chain Action
Shoulder IR
28
Supraspinatus | Innervation
Suprascapular n. (C5)
29
Supraspinatus | Primary Open Chain Action
Arm (shoulder) abduction
30
Supraspinatus | Secondary Open Chain Action
- Holds head of humerus in glenoid fossa, preventing subluxation - Shoulder scaption - Shoulder ER
31
Infraspinatus | Innervation
Suprascapular n. (C5,6)
32
Infraspinatus | Primary Open Chain Action
- Arm (shoulder) ER | - PRIMARY ARM ER***
33
Infraspinatus | Secondary Open Chain Action
- Depresses head of humerus in glenoid fossa to allow for abduction - Holds head of humerus in glenoid fossa preventing subluxation
34
Teres Minor | Innervation
Axillary n. (C5[,6])
35
Teres Minor | Primary Open Chain Action
Arm (shoulder) ER
36
Teres Minor | Secondary Open Chain Action
- Depresses head of humerus in glenoid fossa, allowing for abduction - Holds head of humerus in glenoid fossa, preventing subluxation - Assists in shoulder adduction
37
Subscapularis | Innervation
Upper + Lower Subscapular n. (C5,6)
38
Subscapularis | Primary Open Chain Action
- Arm (shoulder) IR | - PRIMARY ARM IR***
39
Subscapularis | Secondary Open Chain Action
- Depresses head of humerus in glenoid fossa to allow for arm abduction - Holds head of humerus in glenoid fossa, preventing subluxation
40
Latissimus Dorsi | Innervation
Thoracodorsal (C6-8)
41
Latissimus Dorsi | Primary Open Chain Action
Arm extension, Hyperextension, adduction, and IR
42
Latissimus Dorsi | Secondary Open Chain Action
- Assists with forceful exhalation (ex. coughing, sneezing) | - Assists with scapula depression
43
Teres Major | Innervation
Lower Subscapular n. (C5,6)
44
Teres Major | Primary Open Chain Action
Arm extension, hyperextension, adduction, and IR
45
Rhomboideus Major | Innervation
Dorsal Scapular n. (C5)
46
Rhomboideus Major | Primary Open Chain Action
Scapular elevation, adduction, downward rotation
47
Rhomboideus Minor | Innervation
Dorsal Scapular n. (C5)
48
What is the PRIMARY NECK FLEXOR?
SCM
49
What is the PRIMARY SHOULDER GIRDLE ELEVATOR?
Upper fibers of the Trapezius.
50
What is the PRIMARY SHOULDER GIRDLE RETRACTOR?
Middle fibers of the Trapezius.
51
What is the PRIMARY SHOULDER GIRDLE DEPRESSOR?
Lower fibers of the Trapezius.
52
What is the PRIMARY ARM ADDUCTOR?
Pectoralis Major
53
What is the PRIMARY ARM EXTERNAL ROTATOR?
Infraspinatus
54
What is the PRIMARY ARM INTERNAL ROTATOR?
Subscapularis
55
Rhomboideus Minor | Primary Open Chain Action
Adduction, downward rotation, and elevation of scapula

MMT (7 decks)

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