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22 Cards in this Set

  • Front
  • Back
EXTRINSIC SUPERFICIAL BACK LAYER
EXTRINSIC SUPERFICIAL BACK LAYER
TRAPEZIUS

O & I
ORIGIN

1) Superior Nuchal Line
2) External Occipital Protuberance
3) Nuchal Ligament
4) Spinous Processes C7-T12

INSERTION

1) Lateral one-third of clavicle
2) Acromion
3) Spine of Scapula
TRAPEZIUS

Nerve (Innervations)
1) Motor - Accessory Nerve CN XI (spinal root)

2) Proprioception - C3 & C4
TRAPEZIUS

Vasculature
transverse cervical artery
TRAPEZIUS

Main Action
1) Superior fibers: Elevate scapula

2) Middle Fibers: ADduct (retracts) scapula

3) Inferior Fibers: Depress scapula

4) Superior and Inferior fibers: synergistically smoothly rotates scapula and maintain glenoid fossa relative to head of humerus.
LATISSIMUS DORSI

O & I
ORIGINS

1) Spinous processes of T6 - to L5 vertebrae

2) Thoracolumbar fascia

3) Sacrum

4) Iliac Crest

5) Ribs 10-12

INSERTION

Floor of the intertubercular groove (sulcus) of the humerus
LATISSIMUS DORSI

Nerve (Innervations)
Thoracodorsal nerve (C6-C8)
LATISSIMUS DORSI

Vasculature
Thoracodorsal Artery
LATISSIMUS DORSI

Main Action
1) Extends the humerus

2) ADucts the humerus

3) Medially rotates humerus

4) Raises body toward arms when climbing
LEVATOR SCAPULAE

O & I
ORIGIN

Posterior Tubercles of TP of C1 to C4

INSERTION

superior medial angle of scapula
LEVATOR SCAPULAE

Nerve (Innervation)
Dorsal Scapular Nerve C3 - C4
LEVATOR SCAPULAE

Vasculature
transverse cervical arteries
LEVATOR SCAPULAE

Main Action
Elevates and rotates glenoid cavity inferiorly by rotating scapula
RHOMBOID MAJOR

O & I
ORIGIN

Spinous processes of T2 to T5

INSERTION

Medial border of scapula from spine to inferior angle
RHOMBOID MAJOR

Nerve (Innervations)
Dorsal Scapular Nerve (C4, C5)
RHOMBOID MAJOR

Main Action
1) Fix scapula to thoracic wall for smooth efficient movement

2) Retracts (ADducts) scapula

3) elevates scapula
RHOMBOID MAJOR

Vasculature
dorsal scapular
RHOMBOID MINOR

O & I
ORIGIN

1) Lower portion of the nuchal ligament

2) Spinous process of C7-T1

INSERTION

Medial border of the scapula at the spine
RHOMBOID MINOR

NERVE (Innervations)
Dorsal Scapular Nerve (C4-C5)
RHOMBOID MINOR

Vasculature
dorsal scapular
RHOMBOID MINOR

Main Action
1) Retracts (ADducts)

2) Elevate Scapula

3) Rotates the scapula (glenoid fossa) inferiorly
Name the Muscles of the Extrinsic - Superficial Back Layer.
Trapezius

Latissimus Dorsi

Levator Scapulae

Rhomboid Major

Rhomboid Minor