Shoulder Anatomy and Function

The video tutorial provides an in-depth look at the anatomy of the upper limb, starting with an introduction to its functions and mobility. It covers the pectoral girdle, focusing on the clavicle and its common fractures, and then moves on to the scapula, highlighting its structure and processes. The tutorial concludes with an examination of the glenoid fossa and the shoulder joint, discussing their roles in mobility and stability.

Which of the following is NOT a region of the upper limb?

• Brachium

• Pelvis

• Shoulder

• Antebrachium

What is the primary function of the upper limb?

• Protection

• Mobility

• Support

• Weight bearing

Which bone is part of the pectoral girdle?

• Fibula

• Tibia

• Clavicle

• Femur

Where does the clavicle articulate with the sternum?

• Glenoid cavity

• Coracoid process

• Acromion

• Sternoclavicular joint

What is a common cause of clavicle fractures?

• Direct impact to the shoulder

• Indirect force from a fall

• Genetic predisposition

• Overuse of the arm

Which muscle attaches to the coracoid process?

• Deltoid

• Pectoralis minor

• Trapezius

• Latissimus dorsi

What is the function of the acromion?

• Connects to the vertebral column

• Articulates with the humerus

• Serves as an attachment for ligaments

• Forms the socket of the shoulder joint

What is the glenoid fossa's role in the shoulder joint?

• Forms the socket for the humerus

• Allows for muscle attachment

• Provides stability

• Connects to the clavicle

Why is the shoulder joint considered relatively unstable?

• The joint lacks ligaments

• The fit between the glenoid fossa and humeral head is not tight

• The humeral head is too small

• The glenoid fossa is too deep

What type of cartilage covers the joint surfaces in the shoulder?

• Elastic cartilage

• Fibrocartilage

• Hyaline cartilage

• Articular cartilage