pectoral girdle: scapulae

scapula

shoulder blades, thin, triangular flat bones

2a: superior border

shortest and sharpest

2b: medial border

parallels the vertebral column

2c: lateral (axillary) border

thick, abuts the axilla and ends superiorly in a shallow fossa, the glenoid cavity

2d: glenoid cavity

shallow fossa/cavity which articulate with the head of the humerus

the glenoid cavity is visbile laterally and partially visible

anteriorly

2e: superior angle

medial side

2f: lateral angle

thick and contains the glenoid cavity

2g: inferior angle

moves as the arm is raised and lowered

scapular spine

bony ridge on posterior aspect of scapula

acromion

articulates with acromial end of clavicle

coraCOID process

bent-finger-shaped, attachment point for biceps brachii muscle and ligament attachment to clavicle

suprascapular notch

nerve passageway

fossa

shallow depression

infraspinous

fossa on posterior aspect for INFRAspinatus muscle attachment

supraspinous fossa

on posterior aspect for SUPRAspinatus muscle attachment

subscapular fossa

formed by entire anterior surface of scapula (for subscapularis muscle attatchment)