Physical Exam: Art in Healthcare

Historical Background Jean Alexandre Barré first described a sensitive leg sign in 1919 for detecting subtle pyramidal paresis, with the patient prone and one leg flexed at the hip and knee. His 1920 paper introduced the upper limb test—arms outstretched, eyes closed, palms supinated—which later became known as Barré sign or pronator drift. Giovanni Mingazzini had described a similar arm‑drift phenomenon several years earlier, and the coexistence of these names reflects how the sign evolved within neurology. Clinical Mechanism In upper motor neuron lesions, the supinator muscles weaken more than the pronators. As a result, the affected arm gradually drifts downward and the palm turns inward. Clinicians often teach that pronation represents an evolutionarily older, subcortically driven movement pattern that emerges when pyramidal control is impaired. Diagnostic Utility Studies have shown that the pronator drift test is highly sensitive and specific for detecting mild unilateral cerebral...

Historical Background In 1889, Charles McBurney, a New York surgeon, described a “fixed point” of maximal tenderness in acute appendicitis—one-third the distance from the anterior superior iliac spine to the umbilicus on the right. Before imaging, this guided early diagnosis and surgical decisions. Clinical Mechanism Tenderness here marks the shift from vague periumbilical visceral pain to sharp somatic pain as parietal peritoneum inflames—linking appendix position, T10-L1 nerves, and referral patterns. Diagnostic Utility It remains useful in bedside composites like the Alvarado score (sensitivity 50-94%, specificity 60-90%), though imaging dominates; ideal for students to practice anatomic reasoning. Recommended Video Clear OSCE demo of McBurney palpation and guarding (3:12 min): https://www.youtube.com/watch?v=0iTMl6voJKA.   McBurney C. Experience with early operative interference in cases of disease of the vermiform appendix. Ann Surg. 1889;10:6-22.

If you’ve ever stood at the bedside trying to figure out whether the spleen is enlarged—without an ultrasound in sight—Castell’s point is the skill you need in your hands. It’s quick, elegant, and surprisingly underappreciated. Let’s walk through its history, the technique, and what the evidence actually says. The Eponym and Its Origins Castell’s point is named after Donald O. Castell, an American gastroenterologist who published the key description in 1967 in the Annals of Internal Medicine. His paper, “The Spleen Percussion Sign,” was a straightforward clinical study evaluating a single percussion point as a rapid bedside screen for splenomegaly. Castell’s insight was refreshingly practical: instead of attempting to outline the entire spleen by percussion—a notoriously unreliable exercise—why not focus on one reproducible spot and ask a single yes-or-no question? Anatomy Behind the Technique To understand Castell’s point, picture the lowest intercostal space in the left anterior axil...

Hey there, fellow med students and bedside pros! If you’re honing your physical exam skills, Traube’s triangle is one of those classic percussion spots worth mastering. It’s a simple way to screen for splenomegaly or pleural issues right at the patient’s side—no fancy gear required. Let’s dive into its story, how to examine it, and what it really tells you. Ludwig Traube first described this crescent‑shaped area on the left chest in the 1860s, and his assistant Oscar Fraentzel published the earliest detailed account in 1868 in Berliner klinische Wochenschrift . Fraentzel referred to it as the “halbmondförmigen Raum” and outlined its boundaries while crediting Traube. Over time, clinicians began calling it Traube’s triangle—a convenient geometric nickname for the same space. Anatomically, picture a triangle on the left lower chest: its upper border runs along the 6th rib from the midclavicular to the midaxillary line, its lateral border follows the left midaxillary line downward, an...

A Small Spark With a Big Story A Hollenhorst plaque is a tiny, bright, yellow spot that sometimes appears in the small arteries of the retina. It looks harmless, but it can reveal important information about the health of the body’s blood vessels. This little spark of light has a surprisingly long and interesting history. A Sign First Noticed Long Before It Had a Name Doctors began noticing unusual bright spots in the retinal arteries as early as the late 1800s. These early descriptions didn’t yet identify cholesterol crystals, but they showed that something was traveling through the bloodstream and lodging in the eye. In 1927, a physician named Butler described a particularly bright embolus that closely resembles what we now recognize as a Hollenhorst plaque. The Breakthrough Observations of 1958 The modern story began in 1958, when two groups of doctors independently described shiny, reflective yellow plaques in the retinal arteries. One of them was Robert W. Hollenhorst, a vascular ...