Upper Limb 1 - Station 4 Flashcards
what are the rotator cuff muscles
supraspinatus, infraspinatus, subscapularis and teres minor
what type of joint is the glenohumeral joint
synovial ball and socket
what structre goes around the rim of the glenoid cavity
glenoid labrum
function of glenoid labrum
to deepen and stabilise the shoulder joint
where is the radial groove
on the middle of the posterior of the humerus
ligament between coracoid process and acromion
coraco-acromial ligament
function of coraco-acromial ligament
to strengthen the superior aspect of the joint capsule
structures that make up the coraco-acromial arch
coraciod, acromion and coraco-acromial ligamnent
function of the corao-acromial ligament
prevent superior displacement of the humeral head
which direction of dislocation is most common of hte shoulder
anterior
what bursa communicates with the shoulder joint capsule
subscapular
name two burase of the shoulder
subscapular and subacromial
role of the subacromial bursae
to reduce friction between the acromion and humerus
what type of movements may cause subacromial bursitis
repetitive movements overhead
action of the rotator cuff muscles
supraspinatus - abduction
infraspinatus and teres minor - lateral rotation
subscapularis - medial rotation and adduction
important role of rotator cuff muscles
holding the humeral head in the glenoid cavity
intrinsic shoulder muscles
deltoid, supraspinatous, infraspinatous, teres major, teres minor and subscapularis
action of the deltoid
3 portions:
anterior - flexion and medial rotation
middle - abduction
posterior - extension and lateral rotation
innervation of the deltoid
axillary nerve
what cord does the axillary nerve arise from
posterior cord
attachments of the deltoid
clavicle, acromion and spine of the scapula –> deltoid tuberosity of the humerus
which rotator cuff muscle is also innervated by the axillary nerve
teres minor
2 intrinsic shoulder muscles innervated by the suprascapular nerve
supraspinatus and infraspinatus
2 intrinsic shoulder muscles innervated by branches of the subscapular nerve
subscapularis and teres major
innervation of the intrinsic shoulder muscles
deltoid - axillary teres minor - axillary teres major - subscapular subscapularis - subscapular supraspinatus - suprascapular infraspinatus - suprascapula
what nerve is commonly injured in shoulder dislocation
dislocation
where do you test for sensation of axillary nerve
regimental badge area
medial attachment of pectoralis major
sternum, ribs and medial 3rd of the clavicle
action of pectoralis major on shoulder
adduct, flex and medially rotate
the cephalic vein is in what shoulder triangle
the deltopectoral triangle
nerve supply of the serratus anterior
long thoracic
key muscle of stabilising the scapula during limb movements
serratus anterior
winging of the scapula happens when what nerve is damaged
the long thoracic
action of the trapezius
superior - elevate
middle - retract
inferior - depress
lateral attachment of trapezius
acromion, clavicle and spine of the scapula
innervation of the trapezius
spinal accessory nerve (XI)
actions of teres major
medially rotate and adduct
actions of latimus dorsi
extens, adducts and medially rotate
