Pectoral girdle and shoulder Flashcards
What is the pectoral girdle?
The scapula and the clavicle
What is the shoulder joint an articulation between?
The scapula and the humerus
What is the range of movement that can be done at the shoulder?
Flexion Extension Abduction Adduction Medial and lateral rotation Circumduction
What muscle helps to elevate the scapula?
Levator scapulae
What is levator scapulae innervated by?
The dorsal scapular nerve
What muscle helps to ‘square the shoulders’?
Rhomboid major and minor
What are the rotator cuff muscles?
Supraspinatous
Infraspinatous
Subscapularis
Teres minor
What rotator cuff muscle is innervated by the axillary nerve?
Teres minor
What muscles are lateral rotators of the shoulder?
Infraspinatous and Teres minor
What muscle rotates the shoulder medially?
Subscapularis
What muscle is innervated by the thoracodorsal nerve?
Latissimus dorsi
Apart from abducting the shoulder, what other action do the deltoids do?
Flex and extend the shoulder
CNXI innervates what muscle?
Trapezius
What protracts the scapula and is particularly prominent in boxers?
Serratus anterior
Winging of the scapula is caused by damage to what nerve?
Long thoracic nerve
What muscle is commonly torn in rotator cuff injuries?
Supraspinatous
Glenoid labrum, ligaments, biceps tendon and the rotator cuff muscles all help to
stabilise the shoulder joint
Where is the shoulder joint weakest?
Inferiorly
The coracoacromial arch does what
prevents superior displacement of the humerus
what lies above the tendon of the long head of biceps brachii?
the transverse humeral ligament
Anterior dislocation can cause damage to what nerve?
Axillary
Excessive extension and lateral rotation of the humerus can cause
anterior dislocation
Surgical neck fractures can cause damage to what nerve?
Axillary
Testing sensation over the C5 dermatome would be done because of suspected damage to what nerve?
Axillary
People who play tennis can be vulnerable to what condition?
Quadrilateral space syndrome
What goes through the quadrilateral space?
The posterior humerus circumflex artery and the axillary nerve
Passive joint abduction can only be done by the patient in what condition?
suprascapular nerve injury
What forms the medial boundary of the quadrangular space?
long head of triceps brachii
What forms the lateral boundary of the quadrangular space?
surgical neck of the humerus
What forms the superior boundary of the quadrangular space?
Teres minor
What forms the inferior boundary of the quadrangular space?
Teres major
