(Cross Sectional) Week 8 Upper Extremities Anatomy Quiz

What is the anatomical term for the collarbone?

• Clavicle

• Scapula

• Humerus

• Sternum

Answer explanation

The anatomical term for the collarbone is 'clavicle'. The other options refer to different bones: scapula is the shoulder blade, humerus is the upper arm bone, and sternum is the breastbone.

Which bone is located at the front of the shoulder girdle?

• Clavicle

• Scapula

• Humerus

• Sternum

Answer explanation

The clavicle, or collarbone, is located at the front of the shoulder girdle, connecting the arm to the body. It is positioned anteriorly, making it the correct answer compared to the scapula, humerus, and sternum.

What is the name of the joint between the humerus and scapula?

• Glenohumeral joint

• Hip joint

• Knee joint

• Elbow joint

Answer explanation

The joint between the humerus and scapula is called the glenohumeral joint. It is a ball-and-socket joint that allows for a wide range of motion in the shoulder, distinguishing it from other joints listed.

What is another name for the lateral margin of the scapula?

• Vertebral border

• Axillary border

• Superior border

• Inferior border

Answer explanation

The lateral margin of the scapula is known as the axillary border. This border is opposite the vertebral border, which is the medial margin, while the superior and inferior borders refer to the top and bottom edges, respectively.

What is the function of the scapula?

• Forms the anterior portion of the shoulder girdle

• Forms the posterior portion of the shoulder girdle

• Forms the lateral portion of the shoulder girdle

• Forms the inferior portion of the shoulder girdle

Answer explanation

The scapula, or shoulder blade, forms the posterior portion of the shoulder girdle, providing attachment points for muscles and connecting the upper limb to the trunk.

Which margin of the scapula is known as the superior margin?

• Top margin

• Bottom margin

• Side margin

• Middle margin

Answer explanation

The superior margin of the scapula is referred to as the top margin. This is the edge that is positioned highest when the scapula is in its anatomical position.

Which ligament provides support for the superior surface of the shoulder?

• Coracohumeral ligament

• Acromioclavicular ligament

• Transverse humeral ligament

• Coracoacromial ligament

Answer explanation

The acromioclavicular ligament supports the superior surface of the shoulder by connecting the acromion of the scapula to the clavicle, providing stability to the shoulder joint.

What is the outer rim of the glenoid fossa surrounded by?

• A fibrous capsule

• A fibrocartilaginous ring

• A muscular sheath

• A synovial membrane

Answer explanation

The outer rim of the glenoid fossa is surrounded by a fibrocartilaginous ring, known as the labrum, which deepens the socket and provides stability to the shoulder joint.

What fills the bursae in the shoulder joint?

• Blood

• Synovial fluid

• Bone marrow

• Muscle tissue

Answer explanation

The bursae in the shoulder joint are filled with synovial fluid, which acts as a lubricant to reduce friction between the bones and soft tissues during movement. This is essential for smooth joint function.

Bursae are important for which type of movement?

• Static

• Rotational

• Linear

• None of the above

Answer explanation

Bursae reduce friction between moving parts in joints, particularly during rotational movements. They facilitate smooth motion, making them essential for activities involving rotation, such as twisting or turning.