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MMT > Set 1 > Flashcards

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
Q

Coracobrachialis

Primary Open Chain Action

A

Flexion, adduction, horizontal adduction of arm (shoulder)

27
Q

Coracobrachialis

Secondary Open Chain Action

A

Shoulder IR

28
Q

Supraspinatus

Innervation

A

Suprascapular n. (C5)

29
Q

Supraspinatus

Primary Open Chain Action

A

Arm (shoulder) abduction

30
Q

Supraspinatus

Secondary Open Chain Action

A
  • Holds head of humerus in glenoid fossa, preventing subluxation
  • Shoulder scaption
  • Shoulder ER
31
Q

Infraspinatus

Innervation

A

Suprascapular n. (C5,6)

32
Q

Infraspinatus

Primary Open Chain Action

A
  • Arm (shoulder) ER

- PRIMARY ARM ER***

33
Q

Infraspinatus

Secondary Open Chain Action

A
  • Depresses head of humerus in glenoid fossa to allow for abduction
  • Holds head of humerus in glenoid fossa preventing subluxation
34
Q

Teres Minor

Innervation

A

Axillary n. (C5[,6])

35
Q

Teres Minor

Primary Open Chain Action

A

Arm (shoulder) ER

36
Q

Teres Minor

Secondary Open Chain Action

A
  • Depresses head of humerus in glenoid fossa, allowing for abduction
  • Holds head of humerus in glenoid fossa, preventing subluxation
  • Assists in shoulder adduction
37
Q

Subscapularis

Innervation

A

Upper + Lower Subscapular n. (C5,6)

38
Q

Subscapularis

Primary Open Chain Action

A
  • Arm (shoulder) IR

- PRIMARY ARM IR***

39
Q

Subscapularis

Secondary Open Chain Action

A
  • Depresses head of humerus in glenoid fossa to allow for arm abduction
  • Holds head of humerus in glenoid fossa, preventing subluxation
40
Q

Latissimus Dorsi

Innervation

A

Thoracodorsal (C6-8)

41
Q

Latissimus Dorsi

Primary Open Chain Action

A

Arm extension, Hyperextension, adduction, and IR

42
Q

Latissimus Dorsi

Secondary Open Chain Action

A
  • Assists with forceful exhalation (ex. coughing, sneezing)

- Assists with scapula depression

43
Q

Teres Major

Innervation

A

Lower Subscapular n. (C5,6)

44
Q

Teres Major

Primary Open Chain Action

A

Arm extension, hyperextension, adduction, and IR

45
Q

Rhomboideus Major

Innervation

A

Dorsal Scapular n. (C5)

46
Q

Rhomboideus Major

Primary Open Chain Action

A

Scapular elevation, adduction, downward rotation

47
Q

Rhomboideus Minor

Innervation

A

Dorsal Scapular n. (C5)

48
Q

What is the PRIMARY NECK FLEXOR?

A

SCM

49
Q

What is the PRIMARY SHOULDER GIRDLE ELEVATOR?

A

Upper fibers of the Trapezius.

50
Q

What is the PRIMARY SHOULDER GIRDLE RETRACTOR?

A

Middle fibers of the Trapezius.

51
Q

What is the PRIMARY SHOULDER GIRDLE DEPRESSOR?

A

Lower fibers of the Trapezius.

52
Q

What is the PRIMARY ARM ADDUCTOR?

A

Pectoralis Major

53
Q

What is the PRIMARY ARM EXTERNAL ROTATOR?

A

Infraspinatus

54
Q

What is the PRIMARY ARM INTERNAL ROTATOR?

A

Subscapularis

55
Q

Rhomboideus Minor

Primary Open Chain Action

A

Adduction, downward rotation, and elevation of scapula

MMT (7 decks)

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