Pectoral region Flashcards Preview

MSK > Pectoral region > Flashcards

Flashcards in Pectoral region Deck (12):
1

Attachments of pectoral major (no origin)

Clavicular head attaches to clavicle,
Sternocostal head attaches to sternum and ribs,
Fibres from both heads attach to Intertubercular groove of humerus

2

Actions of pec major

Adduction of arm at shoulder,
Medial rotation of arm at shoulder,
Flexion of arm (Clavicular head only)

3

Innervation of pec major

Medial and lateral pectoral nerves

4

Origin of pec minor

Ribs 3-5

5

Attachment of pec minor

Coracoid process of scapula

6

Action of pec minor

Depression of shoulder

7

Innervation of pec minor

Medial pectoral nerve

8

Origin of serratus anterior

Ribs 2-8

9

Attachment of serratus anterior

Costal surface of medial border of scapula

10

Actions of serratus anterior

Rotates the scapula (which allows abduction >90),
Holds the scapula against rib cage (useful when arm reaches anteriorly e.g. Punching - boxers therefore have a prominent serratus anterior)

11

Innervation of serratus anterior

Long thoracic nerve

12

Muscles of the pectoral region

Pec major,
Pec minor,
Serratus anterior

Decks in MSK Class (87):