Shoulder girdle

Question 1

What kind of joint is the sternoclavicular joint

Answer 1

synovial plane with 3 degrees of movement

Question 2

What intracapsular structure does the SC joint have to increase congruency

Answer 2

Has an intra articular disc

Question 3

What are the 4 ligaments involved in the support of the sternoclavicular joint

Answer 3

Anterior sternoclavicular ligament
Posterior sternoclavicular ligament
Inter clavicular ligament
Costoclavicular ligament

Question 4

What kind of joint is the ACJ

Answer 4

A synovial plane joint

Question 5

What are the 3 ligaments that support the ACJ, where do they articulate.

Answer 5

2 coracoclavicular ligaments the conoid and trapezoid ligament they attach clavicle to coracoid process.
AC ligament which attaches clavicle to acromion

Question 6

What are the articulating surfaces and joint type of the glenohumeral joint

Answer 6

the head of humerus articualting with the glenoid fossa supported by the glenoid labrum which increases congurency. It’s a synovial ball and socket

Question 7

What are the 4 movements which take place at the shoudler girdle

Answer 7

Elevation, depression, protraction and retraction

Question 8

Describe what happens during scapullhumeral rhythm and it’s purpose.

Answer 8

• The purpose of scapulohumeral rhythm is to create centralisation of the humerus over the glenoid fossa helps to create stabiluty.
  During scapulohumeral rhythm you have contraction of the upper trapeziusm, lower trapezius and serratus anterior to rotate the scapula, this frees up the subscapualr space.

Question 9

Which muscles are involved in Elevation

Answer 9

Trapezius
levator scapula

Question 10

What muscles contibute to depression?

Answer 10

Lattisimus dorsi
Trapezius

Question 11

What muscles contribute to protraction

Answer 11

Pectoralis minor
Serratus anterior

Question 12

What muscles contribute to retraction

Answer 12

Trapezius
Rhomboids

Question 13

Trapezius (A)
morphology, location, origins, insertions, nerve and action

Answer 13

M - Large triangular paired muscle located on posterior aspect of neck and thorax
O - nuchal line of the occipital bone and occipital protuberance down to the spinous processes and supraspinous ligaments of vertebrae T1-T12
I - Lateral third of the clavicle, medial acromial margian and the spine of scapula
N - Accessory nerve and anterior rami
A - Elevation, Depression and retraction of the Scapula

Question 14

Lattisimus Dorsi (A)
morphology, location, origin, insertion, nerve and action

Answer 14

M - Large and thin, covers almost all of the back muscles at the posterior trunk except the trapezius
O - inferior angle of scapula, Ribs 9-12, posteror crest of ilium, spinous processes of T7-T12 and thoracolumbar fascia
I - Intertubercular sulcus of the humerus
N - Thoracodorsal nerve
A - Depression of the scapular, Internal rotations, adduction anf extension of the arm.

Question 15

Serratus anterior (B)
Morphology, origin, insertion and action

Answer 15

M - Fan shaped muscle on lateral wall of thorax.
O - Ribs 1-9
I - Scapula (superior, medial and inferior)
Action - Retraction, Rotation in Scapulohumeral rhythm

Question 16

Pectoralis Minor (B)
Morphology, Origin, Insertion, Action.

Answer 16

M - Smaller superficial muscle on the chest wall
O - Ribs 3-5
I - Medial border and coracoid process
A - Protraction

Question 17

Rhomboids
Morphology, Action

Answer 17

M - Two Bilateral muscles in the upper back comprised of Rhomboid major and minor
A - Retraction

Question 18

Levator Scapula (C)

Answer 18

M - Long slender muscle in the upper back and neck
A - Elevation