Muscles (O, I, A) - Page 2 Flashcards
Levator Scapulae (O)
transverse processes of first four cervical vertebrae
Levator Scapulae (I)
vertebral border of scapula near superior angle
Levator Scapulae (A)
elevates scapula
Pectoralis Minor (O)
anterior-superior surfaces of ribs 2-4, 2-5, or 3-5 depending on anatomical variation
Pectoralis Minor (I)
coracoid process of scapula
Pectoralis Minor (A)
depresses/protracts shoulder, rotates scapula
Rhomboid Major (O)
spinous processes of superior thoracic vertebrae
Rhomboid Major (I)
vertebral border of scapula from spine to inferior angle
Rhomboid Major (A)
Rhomboid Minor (A)
adducts scapula and performs downward roation
Rhomboid Minor (O)
spinous processes of vertebrae C7-T1
Rhomboid Minor (I)
vertebral border of scapula near spine
Serratus Anterior (O)
anterior and superior margins of ribs 1-8 or 1-9
Serratus Anterior (I)
anterior surface of vertebral border of scapula
Serratus Anterior (A)
protracts shoulder/rotates scapula to make upward rotation
Trapezius (O)
occipital bone, ligamentum nuchae, spinous process of thoracic vertebrae
Trapezius (I)
clavicle and scapula (acromion and scapular spine)
Trapezius (A)
may elevate, retract, rotate scapula upward, elevate clavicle or extend neck
Deltoid (O)
clavicle and scapula
Deltoid (I)
deltoid tuberosity of humerus
Deltoid (A)
whole muscle: abduction of shoulder, flexion/extension, rotation
Supraspinatus (O)
supraspinous fossa of scapula
Supraspinatus (I)
greater tubercle of humerus