Shoulder Flashcards
what is the part of the scapula that articulates with the humerus?
glenoid cavity
what does the glenoid cavity articulate with?
the head of the humerus
the anterior part of the pectoral girdle
clavicle
branch of the brachiocephalic trunk, which arises from the aortic arch
right subclavian artery
artery that arises directly from the aortic arch
left subclavian artery
origin of supraspinatus
supraspinous fossa of the scapula
insertion of supraspinatus
superior facet of the greater tubercle of the humerus
innervation of supraspinatus
suprascapular n. (C4-C6)
action of supraspinatus
initiation of abduction
origin of infraspinatus
infraspinous process of scapula
insertion of infraspinatus
middle facet of the greater tubercle of humerus
innervation of infraspinatus
suprascapular n. (C4-C6)
origin of the teres minor
lateral border of the scapula
insertion of teres minor
inferior facet of the greater tubercle of the humerus
innervation of teres minor
axilllary n. (C5,C6)
action of teres minor
lateral (external) rotation, weak adduction
origin of subscapularis
subscapular fossa of the scapula
insertion of subscapularis
lesser tubercle of the humerus
innervation of subscapularis
superior subscapular n. (C5,C6)
action of subscapularis
medial (internal) rotation
origin of clavicular part of deltoid
lateral 1/3 of clavicle
origin of acromial part of deltoid
acromion
origin of the spinal part of deltoid
spine of the scapula
insertion of deltoid
deltoid tuberosity of the humerus
innervation of deltoid
axillary n. (C5,C6)
action of deltoid
clavicular: flexion, internal rotation, adduction
acromial: abduction
spinal: extension, external rotation, adduction
origin of teres major
inferior angle of the scapula
insertion of teres major
crest of lesser tubercle of the humerus (anterior angle)
innervation of teres major
lower subscapular n. (C5-C7)
action of teres major
internal rotation, adduction, extension
origin of clavicular part of pectoralis major
medial half of clavicle
origin of sternocostal part of pectoralis major
sternum and costal cartilages 1-6
origin of abdominal part of pectoralis major
rectus sheath (anterior layer)
insertion of pectoralis major
crest of greater tubercle of the humerus
innervation of pectoralis major
medial and lateral pectoral nn. (C5-T1)
action of pectoralis major
entire muscle: adduction, internal rotation
clavicular and sternocostal parts: flexion, assist in respiration when shoulder is fixed
borders of the quadrangular space
teres minor, teres major, long head of triceps brachii, humerus
what nerve passes through quadrangular space? what does it innervate?
axillary n.; teres minor and deltoid
what artery comes out of quadrangular space?
posterior circumflex humeral a.