MSK placement Flashcards
Muscles of anterior aspect of upper arm?
Biceps Brachii
Brachialis
Coracobrachialis
(BBC!)
Origin of long head biceps brachii?
supraglenoid tubercle
origin of short head biceps brachii?
coracoid process of scapula
Insertion of biceps brachii?
radial tuberosity
actions of biceps brachii?
supination of forearm,
flexion of elbow
Innervation of biceps Brachii?
musculocutaneous nerve (C5-C6)
Vascular supply of biceps brachii
Brachial artery
where does the biceps brachii tendon lie (long head)
intertubercular groove (biceps pulley)
where can you palpate the insertion of the biceps brachii?
crook of arm
what tests can you do for biceps brachii?
speeds
yergason’s
what forms the roof of the cubital fossa?
bicipital aponeuorosis
what is a positive speeds and what does it mean?
biceps tendonosis and pain is positive
what would weakness without pain mean in a speeds test?
muscle weakness/rupture
what structures lie in the cubital fossa?
biceps tendon, brachial artery, median nerve,
median cubital vein radial nerve (deep branch)
what forms the sides of the cubital fossa?
brachioradialis and pronator teres
where does the brachialis lie?
deep to biceps brachii (behind every great biceps brachii there is a great brachialis’
what is the origin of the brachialis?
distal humerus anterior
near the insertion of the deltoid muscle
where does the brachialis insert?
the ulnar tuberosity
what is the action of the brachialis?
flexion at the elbow (better than the biceps brachii - and makes it look better)
innervation of the brachialis?
musculocutaneous (C5-C7), with 70-80% of people also innervated by radial nerve
what forms the floor of the cubital fossa?
brachialis muscle
what is the Popeye Sign’
sign of a ruptured long head of biceps brachii tendon.
common. characteristic buldge on elbow flexion
why wouldn’t the patient notice much weakness in the upper limb when rupturing the biceps tendon long head
due to the action of the brachialis and supinator muscles.
where is coracobrachialis?
deep to biceps brachii
what is coracobrachialis innervated by?
musculocutaneous nerve
origin of coracobrachialis?
coracoid process of scapula
where does the coracobrachialis travel through?
axilla
where does coracobrachialis insert
medial side of the humoral shaft at the level of deltoid tuberosity
function of coracobrachialis?
flexion of arm/humorus at shoulder, weak adduction
what muscle forms the posterior comp. of upper arm?
triceps brachii
what are the heads of triceps brachii?
long , medial, lateral
medial is deep
what is the arterial supply to the triceps?
profunda (deep) brachial artery
origin of long head triceps brachii
infraglenoid tubercle
origin of medial head triceps
posterior humerus, inferior to radial groove
Origin of lateral head triceps
Posterior humerus, superior to radial groove
insertion of triceps
olecranon of ulnar
function of triceps?
extension of arm at the elbow
innervation of triceps?
radial nerve
how to test spinal segment C7?
tap on triceps tendon
who ruptures triceps tendon? (rare)
weight lifters, steroid users, diabetics, renal failure pts.
how do you know if triceps tendon ruptured>
unable to extend elbow
what is the radial nerve origin?
posterior cord, C5-T1
what might an lateral xray show if triceps tendon ruptured
flake sign
what type of joint is glenohumeral?
ball and socket. synovial
what action can biceps brachii cause at shoulder joint
adduction, abduction , inversio
articulation of shoulder joint
glenoid cavity of scapula
head of humerus
what covers the long head of the biceps?
transverse humeral ligament, only short
what is the main supinator
biceps brachii
what muscle does coracobrachialis have coarsing through
musculocutaneous
shoulder impingement is?
bursitis. inflammation of the bursa locatd just over the rotator cuff tendon of supraspinatus muscle,
acromial spur can cause impingement on the bursa and tendons
what does Hawkins test test for?
impingement
what is the drop arm test for?
impingement and rotator cuff test
the belly press test?
subscapularis
the lift off test
subscapularis
adduction / ext rotation test
supra and infraspinatus
jobe test
supraspinatius
neers test
impingement . Examiner passively elevates the pronated arm of the patient above the level of the shouldr. positive test:pain at anterolateral section of shoulder (subacromial Impingement)
Hawkins test
arm fully adduced and forward flexed. elbow flexed too. apply int rotation. indicates subacromial I’m,igment
drop arm test
hold affected arm in abduction, slowly adduct. rotator cuff tear: arms drops rapidly
