Anatomy of the Humerus

Dr. Morton provides an in-depth tutorial on the humerus, the principal bone of the arm. The video covers the anatomy, bony landmarks, and clinical significance of the humerus. Key structures such as the head, neck, tubercles, and grooves are explained, along with their roles in muscle attachment and joint articulation. The tutorial also highlights the clinical importance of these structures, including potential injuries and their implications. The video concludes with a review of the main points discussed.

What is the primary function of the humerus in the human body?

• To aid in digestion

• To support the skull

• To connect the arm to the shoulder

• To protect the heart

Which joint is formed by the articulation of the humeral head and the glenoid cavity?

• Elbow joint

• Glenohumeral joint

• Hip joint

• Knee joint

What is the anatomical significance of the surgical neck of the humerus?

• It connects the humerus to the ulna

• It is a common fracture site affecting the axillary nerve

• It is the site of muscle attachment

• It is the origin of the biceps muscle

Which muscles attach to the greater tubercle of the humerus?

• Biceps brachii

• Triceps brachii

• Rotator cuff muscles

• Deltoid muscle

What is the function of the intertubercular groove?

• To connect the humerus to the scapula

• To protect the ulnar nerve

• To house the radial nerve

• To serve as a passage for the biceps brachii tendon

What is the role of the deltoid tuberosity on the humerus?

• It is a site for blood vessel passage

• It serves as an attachment point for the deltoid muscle

• It connects the humerus to the radius

• It protects the axillary nerve

What is the function of the trochlea on the humerus?

• To articulate with the ulna

• To support the shoulder joint

• To connect with the clavicle

• To protect the radial nerve

Which structure is known as the 'funny bone'?

• Capitulum

• Medial epicondyle

• Lateral epicondyle

• Olecranon fossa

What is the significance of the olecranon fossa?

• It protects the ulnar nerve

• It connects the humerus to the scapula

• It allows for the extension of the elbow

• It is a site for muscle attachment

Which fossa accommodates the coronoid process of the ulna during elbow flexion?

• Olecranon fossa

• Glenoid fossa

• Radial fossa

• Coronoid fossa