Sterno- and acromioclavicular articulations

Question 1

Sternoclavicular Joint

Answer 1

• Joint surfaces are incisura clavicularis on manubrium sterni and facies artricularis sternalis claviculare
• Joint cavity separated into two by discus artricularis
• Joint capsule attaches to margins of joint surfaces
• Reinforced by ligaments: lig. interclaviculare and lig. sternoclaviculare (ant. and post.) and lig. costoclaviculare
• Spherical type of joint
• Restricted movement in all directions

Question 2

Ligamentum interclaviculare

Answer 2

• links sternal parts of both collar bones above incisura jugularis sterni

Question 3

Ligamentum sternoclaviculare

Answer 3

• Links sternal end of clavicle with manubrium sterni
• On both frontal and dorsal sides

Question 4

Ligamentum costoclaviculare

Answer 4

• Links sternal end of collar bone with first rib

Question 5

Acromioclavicular joint

Answer 5

• Between the lateral end of the clavicula (facies artricularis acromialis) and facies artricularis acromii of shoulder-blade
• discus artricularis is usually inserted between joint surfaces
• Joint capsule attached to margins of joint surfaces
• Joint capsule reinforced by ligamentum acromioclaviculare
• Ligamentum coracoclaviculare (consists of two ligaments: mediallz conoid lig. and laterallz trapezoid lig.)
• Movement in all directions in a very small extent

Question 6

Ligamentum acromioclaviculare

Answer 6

• Reinforces joint capsule
• Between acromion of shoulder blade and the facies artricularis acromii of the clavicle

Question 7

Ligamentum coracoclaviculare

Answer 7

• Between collar bone and coracoid process of scapula
• Consists of two ligaments: laterally the trapezoid ligament and medially the conoid ligament

Question 8

Ligamentum transversum scapulae superius

Answer 8

• Converts incisura scapulae into the suprascapular foramen through which the suprascapular nerve passes into the fossa supraspinata scapulae

Question 9

Ligamentum transversum scapulae inferius

Answer 9

• Connects base of spina scapulae with the border of cavitas glenoidalis
• suprascapular nerve and vessels pass through an opening made by this ligament into the infrascapular fossa

Question 10

Ligamentum coracoacromiale

Answer 10

• Links the coracoid process of the scapula with the acromion of the scapula
• Together with both of these projections fornix humeri is formed which significantly restrics abduction in the shoulder joint into the horizontal level

Question 11

Movements of the shoulder blade

Answer 11

• The shoulder blade is connected with the clavicle and sternum, as well as with thehumerus in the shoulder joint
• Its position is secured bz muscles on the dorsal side of the chest
• Lies in the extent of the 2nd to the 7th rib, sometimes till the 8th
• Shifting and rotational movements
• Shifted either medially/laterally or crainially/caudally
• Movements of the collar bone occur at the same time
• Cavitas glenoidalis scapulae can change its position and so the movement of the entire upper extremty is enabled