Humerus

Dr. Morton, the Noted Anatomist, provides an in-depth tutorial on the humerus, the principal bone of the arm. The video covers the humerus's bony landmarks, including the head, neck, tubercles, and epicondyles, and their clinical significance. It explains the articulation points with the scapula and elbow, highlighting the importance of understanding these structures for medical and anatomical studies. The tutorial also discusses potential injuries and their implications, such as nerve damage from fractures. The video concludes with a review of the key points discussed.

What is the primary function of the humerus in the arm?

• To protect the internal organs

• To facilitate movement at the elbow and shoulder

• To connect the arm to the torso

• To support the shoulder joint

Which part of the humerus articulates with the glenoid cavity of the scapula?

• Greater tubercle

• Head of the humerus

• Surgical neck

• Anatomical neck

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

• It forms the shoulder joint

• It is prone to fractures that may injure the axillary nerve

• It is a common site for muscle attachment

• It is the longest part of the humerus

Which muscles attach to the greater tubercle of the humerus?

• Biceps brachii

• Triceps brachii

• Deltoid

• Rotator cuff muscles

What is another name for the intertubercular groove?

• Radial groove

• Deltoid tuberosity

• Olecranon fossa

• Bicipital groove

Which nerve is associated with the radial groove of the humerus?

• Ulnar nerve

• Axillary nerve

• Median nerve

• Radial nerve

What is the function of the trochlea in the elbow joint?

• To connect the humerus to the scapula

• To facilitate hinge motion

• To protect the radial nerve

• To allow rotation of the forearm

Which epicondyle is known as the 'funny bone'?

• Lateral epicondyle

• Medial epicondyle

• Capitulum

• Trochlea

What is the role of the medial epicondyle in the forearm?

• It forms the elbow joint

• It serves as an attachment for flexor muscles

• It is a landmark for the radial nerve

• It serves as an attachment for extensor muscles

Which fossa accommodates the olecranon process of the ulna?

• Coronoid fossa

• Radial fossa

• Olecranon fossa

• Intertubercular fossa