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Anatomy Shoulder
KYCOM Block 4
84
Anatomy
Graduate
11/15/2012

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Term
what are the axioappendicular muscles
Definition
connect axial skeleton to appendicular skeleton of upper lumb
Term
what are the posterior axioappendicular muscles
Definition
trapezius, latissimus dorsi, levator scapulae, rhomboid major and minor
Term
what are the anterior axioappendicular muscles
Definition
pectoralis major and minor, serratus anterior, and sibclavias
Term
what is the origin of the pectoralis major
Definition
clavicular head: medial half of clavicle, sternocostal head: sternum and upper 6 costal cartilages and aponeurosis of external oblique muscle
Term
what is the insertion of the pectoralis major
Definition
lateral lip of bicipital (intertubercular) groove of humerus
Term
what is the innervation of the pectoralis major
Definition
medial and lateral pectoral nerves
Term
what is the action of the pectoralis major
Definition
flexion, adduction, and medial rotation of the arm and sholder joint, assists in forced inspiration
Term
where is the pectoralis major located in relation to minor
Definition
major is superificial
Term
what is the origin of the pectoralis minor
Definition
3-5 ribs
Term
what is the insertion of the pectoralis minor
Definition
coracoid process
Term
what is the innervation of the pectoralis minor
Definition
medial pectoral nerve
Term
what is the action of the pectoralis minor
Definition
stabilize scapula by drawing it inferior and anterior against the thoracic wall, assists in forced inspiration
Term
what does the serratus anterior corver
Definition
lateral thoracic wall
Term
what is the origin of the serratus anterior
Definition
external surface of ribs 1-8
Term
what is the insertion of serratus anterior
Definition
medial and inferior angle of scapula
Term
what is the inervation of serratus anterior
Definition
long thoracic nerve
Term
what is the action of serratus anterior
Definition
holds scaula against thoracic wall and rotates scapula
Term
what can cause winged scapula
Definition
paralysis of serratus anterior
Term
what occurs in a winged scapula
Definition
medial scapular border protrudes posterior
Term
where in general is the subclavius located
Definition
between clavicle and rib 1
Term
what is the insertion of the subclavias
Definition
inferior surface of middle third of clavicle
Term
what is the origin of the subclavius
Definition
1st rib and 1st costal cartilage
Term
what is the innervation of the subclavias
Definition
nerve to subclavius
Term
what is the action of the subclavius
Definition
depress the clavicle and brace the clavicle against the sternum
Term
where is the clavipectoral fascia located
Definition
sheet of connective tissue deep to the pectoralis major muscle
Term
what does the clavipectoralis fascia attach to
Definition
superior to the clavicle, then it splits, and inferior to the sibclavius
Term
what does the clavipectoral fascia enclose
Definition
subclavius muscle (superior), and pectoralis minor
Term
what is the costocoracoid membrane part of
Definition
clavipectoral fascia
Term
what does the costocoracoid membrane extend between
Definition
subclavius and pectoralis minor muscles
Term
what is the name of the clavipectoral fascia between subclavius and pectoralis minor
Definition
costocoracoid membrane
Term
what is the name of the clavipectoral fascia inferior to pectoralis minor
Definition
suspensory ligament of axilla
Term
what does the supensory ligament of axilla attach to
Definition
axillary fascia at base of axilla
Term
what is another name for the intrinsic muscles of the shoulder
Definition
scapulohumeral muscles
Term
what do the scapulohumeral muscles extend between, in feneral
Definition
shoulder girdle (mostly scapula) to humerus
Term
what are the scapulohumeral muscles involved in
Definition
movements of the arm at shoulder joint
Term
what are the scapulohumeral muscles
Definition
deltoid, supraspinatus, infraspinatus, teres minor, teres major, subscapularis
Term
what is the origin of the deltoid
Definition
lateral third of the clavicle, acromion, spine of the scapula
Term
what is the insertion of the deltoid
Definition
deltoid tuberosity on shaft of humerus
Term
what is the innervation of the deltoid
Definition
axillary nerve
Term
what is the action of the deltoid, what fibers are doing these jobs
Definition
abduction of arm and shoulder joint, anterior fibers flex and medially rotate the arm, the posterior fibers extend lateral and rotate the arm
Term
what is the origin of the supraspinatus
Definition
supraspinous fossa on the scapula
Term
what is the insertion of the supraspinatus
Definition
greater tubercle of the humerus (upper facet)
Term
what is the innervation of the supraspinatus
Definition
suprascapular nerve
Term
what is the action of the supraspinatus
Definition
help stabilize shoulder joint, initiate and assist deltoid in abduction of the arm at shoulder joint
Term
what is the origin of the infraspinatus muscle
Definition
infraspinous fossa of scapula
Term
what is the insertion of the infraspinatus muscle
Definition
greater tubercle of the humerus (middle facet
Term
what is the innervation of the infraspinatus muscle
Definition
suprascapular nerve
Term
what is the action of the infraspinatus muscle
Definition
stabilize shoulder joint, laterally rotate arm at shoulder joint
Term
what is the origin of the teres minor
Definition
middle part of lateral border of the scapula
Term
what is the insertion of the teres minor
Definition
greater tubercle of the humerus lower facet
Term
what is the innervation of the teres minor
Definition
axillary nerve
Term
what is the action of the teres minor
Definition
helps stabilize the shoulder joint, laterally rotates the arm at the shoulder joint
Term
what is the origin of the subscapularis
Definition
subscapular fossa (anterior scapula)
Term
what is the insertion of the subscapularis
Definition
lesser tubercle of the humerus
Term
what is the innervation of the subscapularis
Definition
upper and lower subscapular nerves
Term
what is the action of the subscapularis
Definition
help stabilize the shoulder joint, medial rotator of arm at shoulder joint
Term
what is sacerificed so the shoulder can have a wider range of motion
Definition
stability
Term
what is the most commonly dislocated large joint
Definition
rotator cuff
Term
what is the strength of the rotator cuff dependent on
Definition
tone of short muscles connecting scapula to upper end of the humerus, the rotator cuff muscles
Term
what are the rotatoe cuff muscles
Definition
supraspinatus, infraspinatus, teres minor, subscapularis
Term
what aspect of the rotator cuff is weak, what can this cause
Definition
inferior dislocation of the head of the humerus
Term
what is the origin of the teres major
Definition
lower part of lateral border of scapula and posterior aspect of the inferior angle of scapula
Term
what is the insertion of teres major
Definition
medial lip of bicipital (intertuvercular) groove of the humerus
Term
what is the innervation of the teres major
Definition
lower subscapular nerve
Term
what is the action of the teres major
Definition
medial rotation, extension, and adduction of the arm at the shoulder joint
Term
what does the quadrangular space communicate between
Definition
axilla and posterior aspect of shoulder
Term
in the posterior view, what is the superior boundry of the quadrangular space
Definition
teres minor
Term
in the posterior view, what is the inferior boundry of the quadrangular space
Definition
teres major
Term
in the posterior view, what is the medial boundry of the quadrangular space
Definition
long head of tricepts brachii
Term
in the posterior view, what is the lateral boundry of the quadrangular space
Definition
humerus surgical neck
Term
in the anterior view, what is the superior boundry of the quadrangular space
Definition
subscapularis
Term
what passes through the quadrangular space
Definition
posterior curcumflex humeral vessels and axillary nerve
Term
where does the axillary nerve originate
Definition
from posterior cord of the brachial plexus in the axilla
Term
what fibers does the axillary nerve have
Definition
ventral rami of C5 and C6
Term
describe the location of the axillary nerve in the quadrangular space
Definition
posterior through space inferior to shoulder joint
Term
what nerve is volurnable to damage during shoulder dislocations
Definition
axillary
Term
what are the branches of the axillary nerve
Definition
muscular branches to the deltoid and teres minor muscles, articular branch to the shoulder joint, upper lateral cutaneous nerve of the arm
Term
what does the upper lateral cutaneous nerve of the arm supply
Definition
skin over superior part of lateral aspect of arm
Term
where is the triangular space in relation to the quadrangular
Definition
medial
Term
in the posterior view, what is the superior boundry of the triangular space
Definition
teres minor
Term
in the posterior view, what is the inferior boundry of the triangular space
Definition
teres major
Term
in the posterior view, what is the lateral boundry of the triangular space
Definition
long head of triceps brachii
Term
in the anterior view, what is the superior boundry of the triangular space
Definition
subscapularis muscle
Term
what runs through the triangular space
Definition
circumflex scapular vessels
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