Myology 1.5 Chest Flashcards
3 muscles that insert in bicipital groove
Latamissius dorsal
Pectoralis major
Teres major
Protractors of the scapula
Pectoralis minor and serratus anterior
Origin is the ribs
Sternocostal head also attaches at abdominal aponeurosis
.
Pec major is deep to
Anterior deltoid
Pec major actions. All heads
Adduction
Horizontal adduction
Medial rotation
Of the humerous
Pec minor is deep to
Pec major
Muscles of inspiration
Pec minor
Serratus anterior
Headache muscle
Pec minor
Pec minor attachments
Ribs 3,4,5
Pec minor actions
Protraction
Depression
Downward rotation of the scapula
Serr anterior attachments
Proximal attachment: Anterior surface of ribs 1-8. Lateral to pec minor
Distal attachment: medial border of the scapula anterior aspect
Which muscle when weakened causes winged scapula
Serratus anterior
Set anterior. Actions
Protraction and upward rotation of the scapula
Agonist versus antagonist
Agonist is muscle contracting or doing the work
Antagonist is the relaxed on