MSK Flashcards
anterior wall of the axilla is formed by the
pectoralis major and the pectoralis minor muscle
posterior wall of the axilla is formed by the
latissimus dorsi muscle
medial wall of the axilla is formed by the
thoracic wall, and serratus anterior muscle
lateral wall of the axilla is formed by the
intertubercular sulcus of the humerus
the axillary artery is a continuation of which artery
subclavian
at what anatomical point does the axillary artery start
lateral border of the 1st rib
at what anatomical point does the axillary artery become the brachial
inferior border of the teres major
what nerve roots form the upper trunk
C5-T1
Erb’s point is
C5, C6
the lower trunk of the brachial plexus consists of
C8-T1
injury to the lower trunk of the brachial plexus is called
Klumpke’s palsy
muscles affected by Klumpke’s palsy are
intrinsic muscles of the hand and ulnar, flexors of the wrist and fingers
branches of the lateral cord of the brachial plexus
lateral pectoral, lateral root of median nerve, musculocutaneous
branches of medial cord of brachial plexus
medial pectoral, ulnar, medial cutaneous of arm, medial cutaneous of forearm, medial root of median nerve
branches of the posterior cord of the brachial plexus are
thoracodorsal nerve, axillary nerve radial nerve, subscapular nerve
which vein in the dorsal venous arch is more lateral
cephalic
which vein in the dorsal venous arch is more medial
basilic
median cubital vein does what
shunts blood form the cephalic vein to the basilic
axillary lymph node groups are
anterior pectoral posterior subscapular apical central lateral
which part of the clavicle is the weakest?
middle third
the acromioclavicular joint is what sort of joint?
gliding/plane
the sternoclavicular joint is what sort of joint?
saddle
which joint links the proximal upper limb to the vertical body
sternoclavicular
describe the scapula-humeral rhythm
beyond the first 30 degrees for every 3 degrees of abduction there are 2 degrees at the shoulder joint and 1 degree at the scapula thoracic joint
elevation of the scapula is stimulated by
levator scapulae
trapezius descending fibres
depression of the scapula is stimulated by the
inferior trapezius
protraction of the scapula is stimulate by the
serratus anterior
retraction of the scapula is stimulated by the
trapezius middle fibres and rhomboids
lateral upwards rotation and elevation of the glenoid cavity is by the
trapezius ascending and descending
medial downward rotation depressing the glenoid cavity is by the
gravity, levator scapulae, the rhomboids, and pectoralis minor
the rim of the glenohumeral joint contains a cartilage called
fibrocartilaginous glenoid labrum
function of the glenoid labrum
to increase the depth for the humeral head attachment
glenohumeral ligament strengthens which aspect of the glenohumeral joint
anterior
the coraco-acromial arch consists of the
acromion and the coracoid process of the scapula and the acromial arch ligament
which part of the glenohumeral joint is the weakest
inferiorly
which bursae communicates with the bursae
subscapular
subacromial bursae function is
facilitates movement of the supraspinatous tendon
anterior fibres of the deltoid are to what on the shoulder
part flexion and medially rotate the shoulder joint
middle fibres of the deltoid do what to the shoulder
abduct
the posterior fibres of the deltoid do what to the shoulder
extend and laterally rotate the shoulder
deltoid nerve supply is the
axillary
sensation of the axillar nerve may be tested where?
badge area
the pectoralis major muscle does what to the shoulder
adducts and medially rotates the humerus at the glenohumeral joint
the triangular space below the clavicle between the deltoid and pectoralis major muscle is the deltopectoral triangle, what vein is found here?
cephalic vein
serratus anterior nerve supply is the
long thoracic nerve
damage to the long thoracic nerve yields
a winged scapula
superior fibres of the trapezius do what to
elevate the scapula
middle fibres of the trapezius do what
retract the scapula
inferior fibres of the trapezius do what
depress the scapula
trapezius innervation is the
spinal accessory nerve
what does the teres major do to the shoulder
adducts and medially rotates
the latissimus dorsi do to the shoulder
medially rotates the shoulder joint
shoulder joint flexion is by the
anterior deltoid
shoulder joint extension is by the
posterior deltoid
shoulder joint adduction is by the
teres major and subscapularis
shoulder joint abduction is by the
middle part of the deltoid and supra spinatous
shoulder medial or internal rotation is by the
subscapularis
latissimus dorsi
pectorals major
teres major
shoulder lateral or external rotation is by the
teres minor and infraspinatus
deltoid posterior