Movements of the pectoral girdle Flashcards
Which muscle elevate the scapula?
Trapezius (upper part)
Levator scapulae
Rhomboid minor
Rhomboid major
Which muscles depress scapula?
Ant: Subclavius Pec minor Lower fibres of Pec Major Lower fibres of serratus anterior
Post:
Lower trapezius
Lower fibres of serratus anterior
Lower fibres of lat dorsi
Which muscles protract the scapula? (Scapula abduction)
Pec minor
Pec major
Serratus anterior
Which muscles retract the scapula?
Rhom. Minor
Rhom. Major
Middle fibres of trapezius
Upper fibres of Lat dorsi.
Which muscles inferiorly rotate the scapula?
Ant.
Pec minor
Lower pec major
Post.
Levator scapulae
Rhom Minor
Rhom Major
Which muscles superiorly rotate the scapula?
Trapezius (upper part)
Trapezius (lower part)
Serratus anterior
What movements does pec major contribute to?
- Adducts the humerus
- Internally rotates humerus
- Can help protract scapula by pulling on humerus
What movements does subclavius contribute to?
Braces scapula
Weal depressor of scapula
What movements does pec minor contribute to?
Depresses scapula
Helps protract scapula
What movements does serratus anterior contribute to?.
- Protracts scapula
- Lower fibres help superiorly rotate scapula
What movements does trapezius contribute to?
Fibres all together = Retracts scapula Sup. only = Elevates scapula Middle only = Retracts scapula Inf. only = Depresses scapula Sup and Inf. = Superior rotation of scapula
What movements does levator scapula contribute to?
Elevates scapula
Helps inferiorly rotate scapula
What movements does rhom major and minor contribute to?
Retracts scapula
Elevates scapula
Helps inferiorly rotate scapula
What movements does lat dorsi contribute to?
Adducts humerus
Internally rotates humerus
Lower fibres can depress scapula by pulling on humerus
Can inferiorly rotate scapula by pulling on humerus
