Scapular Sling Muscles

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What are the 7 muscles of the scapular sling?
- 1. Rhomboideus major
- 2. Rhomboideus minor
- 3. Levator scapulae
- 4. Trapezius
- 5. Serratus anterior
- 6. Pectoralis minor
- 7. Subclavius
Origin of rhomboideus major?

spinous processes of T₂-T₅
Insertion of rhomboideus major?

medial margin of scapula (between spine and inferior angle)
Functions of rhomboideus major?
- Retraction (adduction)
- Downward rotation
- Stabilize scapula
Which scapular sling muscles are found superficial to the erector spinae & spinotransversalis muscles?
- rhomboideus major
- rhomboideus minor
- trapezius
Which scapular sling muscles are found sandwiched between trapezius and the erector spinae muscles?
- rhomboideus major
- rhomboideus minor
rhomboideus minor is found __________ to rhomboideus major.

superior
Origin of rhomboideus minor?

spinous processes of C₇-T₁
Insertion of rhomboideus minor?

medial margin of the scapula (base of the scapular spine)
Functions of rhomboideus minor?
- Retraction (adduction)
- Downward rotation
- Stabilize scapula
Origin of levator scapulae?

transverse processes of C₁-C₄
Insertion of levator scapulae?

superior angle of scapula
Functions of levator scapulae?
- Elevation
- Lateral neck flexion (unilateral)
- Stabilize scapula
levator scapulae is found deep to __________.

trapezius
Which scapular sling muscle reacts to stress by pulling the shoulder to the neck?

levator scapulae
Origin of trapezius?
- base of the occiput
- superior nuchal ligament
- spinous processes of C₇ & T₁-T₁₂
Insertion of trapezius?
- lateral 1/3 of clavicle
- acromion
- spine of the scapula
Functions of trapezius?
- Retraction (adduction)
- Upward rotation
- Neck extension
- Elevation
- Depression
- Stabilize scapula
What is the most superficial muscle of the back?

trapezius
Origin of serratus anterior?

outer surface of ribs 1-9
Insertion of serratus anterior?

medial margin of scapula
Functions of serratus anterior?
- Protraction (abduction)
- Upward rotation
- Stabilize scapula
Which of the scapular sling muscles is found between the scapula and ribs?

serratus anterior
Which of the scapular sling muscles is found on the lateral thorax?

serratus anterior
Which scapular sling muscles forms the medial wall of the axilla?

serratus anterior
Origin of pectoralis minor?

ribs 3, 4 & 5
Insertion of pectoralis minor?

coracoid process of scapula
Functions of pectoralis minor?
- Protraction (abduction)
- Downward rotation
- Stabilize scapula
- Active in forced breathing
Pectoralis minor is _____________ to pectoralis major.

deep
Origin of subclavius muscle?

first rib
Insertion of subclavius muscle?

inferior, medial clavicle
Functions of subclavius muscle?
- Downward rotation of clavicle
- Stabilize clavicle
What two muscles of the scapular sling are deep to pectoralis major?
- pectoralis minor
- subclavius
The subclavius muscle is found _________ to pectoralis major.

deep
All 7 scapular sling muscles ____________ on the axial skeleton and ___________ on the clavicle & scapula.
- originate
- insert
All 7 scapular sling muscles stabilize the scapula except the ____________ which stabilizes the clavicle.

subclavius
What is the function of the scapular sling muscles?

suspend the upper limb from the body
What muscles produce upward rotation of the scapula?
- trapezius
- serratus anterior
What muscles produce downward rotation of the scapula?
- rhomboideus major
- rhomboideus minor
- pectoralis minor
What muscles produce protraction (abduction) of the scapula?
- serratus anterior
- pectoralis minor
What muscles produce retraction (adduction) of the scapula?
- rhomboideus major
- rhomboideus minor
- trapezius
What muscles produce elevation of the scapula?
- levator scapulae
- trapezius
What muscles produce depression of the scapula?

trapezius

Author

mandelyn

240943

Card Set

Scapular Sling Muscles

Description

Muscles of the scapular sling

Updated

2013-10-16T05:37:59Z