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Muscle Table.Back & Suboccipital Area > Superficial (Extrinsic) Back Muscles > Flashcards

Superficial (Extrinsic) Back Muscles Flashcards

1
Q

Trapezius (superior fibers): Origin

A
  1. Superior nuchal line
  2. EOP
  3. Ligamentum nuchae
  4. C7 SP
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2
Q

Trapezius (superior fibers): Insertion

A

Lateral 1/3 of clavicle

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3
Q

Trapezius (superior fibers): Action

A
  1. Superior rotation of scapula
  2. Elevation of scapula
  3. Adduction of scapula
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4
Q

Trapezius (superior fibers): Nerve

A
  1. CN.XI (motor) - Spinal accessory

2. C3, 4 (proprioception)

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5
Q

Trapezius (middle fibers): Origin

A

C7-T6 spinous processes

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6
Q

Trapezius (middle fibers): Insertion

A

Acromion

Scapular spine

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7
Q

Trapezius (middle fibers): Action

A

Adduction of scapula

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8
Q

Trapezius (middle fibers): Nerve

A

CN XI (motor)

C3,4 (proprioception)

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9
Q

Trapezius (inferior fibers): Origin

A

T7-T12 Spinous Processes

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10
Q

Trapezius (inferior fibers): Insertion

A

Tubercle of base of scapular spine

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11
Q

Trapezius (inferior fibers): Action

A

Superior rotation of scapula

Draws scapula downward

Adduction of scapula

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12
Q

Trapezius (inferior fibers): Nerve

A

CN XI (motor)

C3,4 (proprioception)

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13
Q

Latissimus dorsi: Origin

A

Aponeurosis fused with TL fascia (SP’s and supraspinous ligaments of T6-sacrum, posterior iliac crest)

Ribs 9-12

Inferior angle of scapula

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14
Q

Latissimus dorsi: Insertion

A

Bottom of intertubercular groove of humerus

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15
Q

Latissimus dorsi: Action

A

Extends humerus

Adducts humerus

Medially rotates humerus (down stroke)
(i.e. internal rotation of shoulder)

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16
Q

Latissimus dorsi: Nerve

A

Thoracodorsal nerve (C6, 7, 8)

17
Q

Levator scap: Origin

A

TPs of C1-C4

18
Q

Levator scap: Insertion

A

Medial (vertebral) border of scapula above spine

19
Q

Levator scap: Action

A

Elevates scapula

Inferior rotation of scapula

Rotation of scapula

20
Q

Levator scap: Nerve

A

C3,4 branches of Cervical Plexus

Dorsal scapular nerve (C5)

21
Q

Rhomboid minor: Origin

A

Inferior aspect ligamentum nuchae

C7-T1 SPs

22
Q

Rhomboid minor: Insertion

A

Vertebral (medial) border scapula (@ base of spine)

23
Q

Rhomboid minor: Action

A

Adduct scapula

Inferior rotation of scapula

24
Q

Rhomboid minor: Nerve

A

Dorsal scapular nerve (C5)

25
Q

Rhomboid major: Origin

A

T2-T5 SPs & their Supraspinous ligaments

26
Q

Rhomboid major: Insertion

A

Vertebral (medial) border of scapula (below spine)

27
Q

Rhomboid major: Action

A

Adduct & inferior rotation of scapula

28
Q

Rhomboid major: Nerve

A

Dorsal scapular nerve (C5)

29
Q

Superficial muscles of the back

A

This group of muscles connects the upper limb to the vertebral column

Muscle Table.Back & Suboccipital Area (2 decks)

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