ANATOMY
7
Upper Limb - Muscles
19.
Which muscle initiates shoulder abduction
a.
the multipennate centre of deltoid
F
b.
the anterior and posterior fibres of deltoid
F
c.
supraspinatus
T – first 10degrees but deltoid is chief abductor
d.
teres minor
F – aids lat rot’n
20.
Which causes lateral rotation of the shoulder ? p792 table 6.13
a.
Subscapularis
F
b.
teres minor
T- from BLITZ
c.
teres major
F
d.
deltoid
T - YES deltoid and teres minor are synergists (infraspinatus is main one)
e.
serratus anterior
F
f.
Is conducted by muscles supplied by C5
T – but C5 and C6(infrspin, teres, deltoid)
g.
Is associated with shoulder adduction
F – abduction
21.
What stabilises the abducted shoulder ? p789
a.
Capsule
F
b.
long head of triceps
T – from BLITZ
c.
glenohumeral ligament
F
d.
coraco-acromial arch
F
e.
gleno-humeral joint
F
f.
Is largely due to the glenoid labrum
F
g.
Is mainly due to the glenohumeral ligaments
F
h.
Is due mainly to musculotendinous cuff
F - UNSURE but blitz says triceps
22.
Rotator cuff includes all the following EXCEPT p698
a.
Subscapularis
F
b.
teres major
T - All the rest are rotator cuff muscles
c.
teres minor
F
d.
infraspinatus
F
e.
supraspinatus
F
23.
Which muscles directly attach the pectoral girdle
( scapula / clavicle) to the thorax
a.
pectoralis major
T – Prox to clavicle and sternum and insertion to humerus
b.
pectoralis minor
T
c.
subclavius
T
24.
Which pairing is correct regarding scapula movement: CHECK
a.
Protraction – serratus anterior
T - p752 Moore
b.
Rhomboids – depression
F - Retracts scapula and rotates it to depress the glenoid cavity
c.
Teres minor - arm lateral rotation
F - Serratus posterior
25.
Latimus dorsi p692
a.
arises from spinous processes of T2 to L5
F – T7-T12 pg 692 Moore
b.
externelly rotates humerus
F – medially rotates humerus – anterior attachment to humerus) pg 691 moore
c.
inserts into lesser tuberosity of humerus
F – floor of intertubercular groove of humerus) pg 691 Moore
d.
spirals around the upper border of teres major
F - spirals around lower border of teres major
e.
arise from the iliac crest
T
26.
Teres major table 6.2 p691
a.
forms the lateral border of the triangular space
F - forms upper border
b.
largely acts to extend the arm
F - No adducts and medially rotates
c.
forms the lower border of the quadrilangular space
T
d.
is supplied by the axillary nerve
F - No. C6.C7 lower subscapular nerve
e.
arises from the medial border of the scapula
F - No. From dorsal surface of inferior angle of scapula