So much of what we learn in medicine is based on what is high yeild. We constantly prepare for exams. But medicine as a subject is inherently interesting and full of magical wisdoms. This is my try at collecting some of those. I plan to continiously update it. If you have something intersting to share send it to me here 👋🏻.
At birth, people have a rightward axis because RV is relatively massive, as pulmonary vascular resistance is higher than systemic vascular resistance in-utero. Several months after, the birth axis gradually shifts to about 60 or so. The axis moves towards the left as an individual ages. +15 to +30 degrees is where it usually settles.
Insula means island (Latin). Islets (of Langerhans) make insulin. Which roughly translates to little islands. Insulin is an "island hormone." The word Insulin hints at that fact. Also, insulin has a particular amino acid sequence. The sequence is altered to form other types of insulin. Hence their names: Lispro is Lysine and Proline, and Glargine is Glycine and Arginine.
3, 4, 6, and 12 CN nuclei lie in a straight line in the brain stem. That line if extended passes through the the anterior horn of the spinal cord. The anterior horn is a continuous column of grey matter which gives rise to nerves innervating skeletal muscles. 3, 4, 6, and 12 CN nuclei give rise to nerve innervating muscles of the head and neck. One exciting way of looking at it is: a continuous column of grey matter starts scattering once it reaches the brain stem.