Anterior Axio-Appendicular Muscles

Question 1

Pectoralis Major

Answer 1

Proximal: clavicular head : medial clavicle; costal head: sternum & ribs 5-6
Distal: lateral lip of intertubercular crest (twisted)
Innervation: lateral (C5-C7) & medial pectoral nerve (C8-T1)
Blood supply: pectoral branch of thoracoacromial trunk
Functions: IR, FLX, & ADD

Question 2

Pectoralis Minor

Answer 2

Proximal: ribs 3-5
Distal: coracoid process
Innervation: medial pectoral nerve (C8-T1)
Blood supply: pectoral branch of thoracoacromial trunk
Functions: depression, anterior tilt of scapula, & elevates ribs

Question 3

Serratus Anterior

Answer 3

Proximal: ribs 1-9
Distal: anterior medial border of scapula
Innervation: long thoracic nerve (C5-C7)
Blood supply: lateral thoracic & thoracodorsal arteries
Functions: protraction, hold scapula to the thorax, upward rotation of scapula, & elevation of ribs

Question 4

Subclavius

Answer 4

Proximal: junction of 1st rib & cartilage
Distal: subclavian groove (between coronoid & trapezoid ligaments)
Innervation: subclavian nerve (C5-C6)
Blood supply: clavicular branch of thoracoacromial artery
Functions: depression of clavicle