Top 10 High-Yield Anatomy Concepts (With Mnemonics)

Anatomy is tested on nearly every medical licensing exam, from USMLE Step 1 to nursing boards. The topics below come up again and again. Learn them well and you will gain points across many question types.

Top 10 High-Yield Anatomy Concepts

1. Cranial nerves (CN I–XII). There are 12 cranial nerves. Each has a name, number, and function (sensory, motor, or both). Knowing which foramen each nerve exits through is especially high-yield.

2. Brachial plexus. The brachial plexus is formed by the ventral rami of C5–T1. It gives rise to all major nerves of the upper limb. Injury at different levels causes distinct motor and sensory deficits.

3. Rotator cuff muscles. Four muscles stabilise the shoulder joint. Knowing which muscle is responsible for which motion helps you identify the nerve and the injury from clinical clues.

4. Carpal bones. Eight small bones form the wrist in two rows. Scaphoid fractures are the most commonly tested because of their risk of avascular necrosis.

5. Heart valves and blood flow. Blood flows through the heart in one direction: right atrium → right ventricle → lungs → left atrium → left ventricle → body. Knowing valve positions and sounds is essential for clinical cardiology questions.

6. Coronary arteries. The left anterior descending (LAD) artery supplies the anterior wall and septum. It is the most common site of myocardial infarction, which is why it is called "the widow maker."

7. Abdominal aorta branches. The aorta gives off paired and unpaired branches. The three unpaired anterior branches (celiac, superior mesenteric, inferior mesenteric) supply the gut and are tested heavily in vascular and surgical questions.

8. Dermatomes. Each spinal nerve supplies a defined area of skin. Key landmarks: C6 (thumb), T4 (nipple), T10 (umbilicus), L1 (inguinal ligament), L4 (knee), S1 (lateral foot).

9. Nerve injury patterns. Classic injuries include radial nerve palsy (wrist drop), ulnar nerve palsy (claw hand), median nerve palsy (ape hand), common peroneal nerve palsy (foot drop), and long thoracic nerve injury (winged scapula).

10. Cranial foramina. Structures pass through specific holes in the skull base. The foramen magnum (brainstem, vertebral arteries), jugular foramen (CN IX, X, XI), and superior orbital fissure (CN III, IV, V1, VI) are the most commonly tested.

Mnemonics to Remember Them

Cranial Nerves — "On Old Olympus' Towering Tops A Finn And German Viewed Some Hops"

Each first letter matches a cranial nerve in order:

To remember whether each nerve is sensory (S), motor (M), or both (B), use: "Some Say Marry Money But My Brother Says Big Brains Matter More" — reading S, S, M, M, B, M, B, S, B, B, M, M for CN I through XII.

Rotator Cuff — "SITS"

The four rotator cuff muscles are: Supraspinatus, Infraspinatus, Teres minor, Subscapularis.

• Supraspinatus initiates abduction (first 15°) and is the most commonly torn.
• Infraspinatus and teres minor both laterally rotate the arm.
• Subscapularis medially rotates the arm.

Try 5 free questions on shoulder anatomy right now to test whether this has stuck.

Carpal Bones — "Some Lovers Try Positions That They Cannot Handle"

Reading from lateral to medial, proximal row then distal row:

Proximal row: Scaphoid, Lunate, Triquetrum, Pisiform

Distal row: Trapezium, Trapezoid, Capitate, Hamate

The scaphoid sits at the base of the anatomical snuffbox. Tenderness there after a fall on an outstretched hand = scaphoid fracture until proven otherwise.

This is just a taste — get our full library of anatomy mnemonics free when you create an account.

Mnemonics alone are not enough. You need to practise applying concepts to clinical scenarios. Play a quick anatomy game to see how well you can identify nerve injuries and anatomical relationships under time pressure.