It's a key topic in spatial disorientation — Page 457, Lesson 708

This is the index of the book — a list of topics and the page numbers where they appear. I want to walk you through what this tells us about the structure of the Human Performance & Limitations syllabus you're about to study. Let's start with the first entry: Bereavement appears on page 132. That's a topic under stress or life events — we'll cover how grief affects cognitive performance and decision-making in the cockpit. Next, Bifocal on page 83 — that's an optical term, referring to a type of corrective lens with two focal lengths, relevant to vision standards for pilots. Bipolar Disorder on page 106 — that's a psychiatric condition, one of the medical disqualifications or considerations you need to know for licensing. Black Hole Effect on page 191 — this is a visual illusion, a dangerous phenomenon where a pilot approaches an airport over water or unlit terrain at night and misjudges height because there are no visual cues. It's a key topic in spatial disorientation. Blackout on page 92 — that's a temporary loss of vision or consciousness, often from +Gz acceleration, which we'll study under the cardiovascular system. Blind Spot on page 79 — that's the physiological blind spot in each eye where the optic nerve leaves the retina; no photoreceptors there. Blood Donation on page 29 — this relates to the circulatory system and the rules about how long after donating blood you can fly, because your blood volume and oxygen-carrying capacity are reduced. Blood Pressure on page 26 — a fundamental vital sign, systolic over diastolic, and the limits for medical certification. Blood Transfer on page 108 — that's likely about transfusion or the body's own blood-shunting mechanisms under stress or acceleration. BMI and Body Mass Index both on page 98 — that's your weight in kilograms divided by height in metres squared, a screening tool for obesity-related health risks that affect pilot fitness. Body Language on page 258 — that's non-verbal communication, part of Crew Resource Management or CRM. Body Temperature on page 206 — core temperature regulation, relevant to thermal stress and circadian rhythms. Bone Marrow on page 20 — that's part of the blood and immune system, where red blood cells are produced. Bottom-up on page 148 — that's a type of information processing, where perception starts with raw sensory data and builds upward to recognition, as opposed to top-down processing. Boyle’s Law on page 40 — that's the gas law: pressure times volume equals a constant at constant temperature. For aviation, it explains why gas expands in your body as you climb — trapped gas in sinuses, ears, or the gut. Brain on page 50 — the central organ of the nervous system. Break Point on page 135 — that's a term from stress physiology, the point at which performance starts to decline under increasing stress. Briefings on page 263 — standard operating procedure, part of crew coordination. Bronchi on page 38 — the main air passages from the trachea into the lungs. Then we move into the C section. Caffeine on page 105 — a stimulant, its effects on alertness and sleep, and the limitations on its use in aviation. Capillaries on page 21 — the smallest blood vessels where gas and nutrient exchange happens. Carbohydrates on page 21 — a macronutrient, the body's primary energy source. Carbon Dioxide on page 21 — CO₂, a waste product of metabolism, exhaled through the lungs. Carbonic Acid on page 21 — formed when CO₂ dissolves in blood, part of the acid-base buffer system. Carbon Monoxide on pages 25 and 46 — a poisonous gas from incomplete combustion, binds to haemoglobin 200 times more strongly than oxygen, causing hypoxia even at sea level. Critical in cockpit heater and exhaust leak scenarios. Central Decision Maker on page 156 — a model in human information processing, the part of the brain that makes the final decision after sensory input and memory retrieval. Central Vision on page 77 — the foveal vision, high-acuity, used for reading instruments and identifying details. Channel on page 254 — in communication models, the medium through which a message travels. CHIRP on page 311 — that's the Confidential Human Factors Incident Reporting Programme, a UK-based voluntary reporting system for aviation safety occurrences. Chokes on page 50 — likely refers to the physiological phenomenon of breath-holding or airway obstruction, possibly under decompression or hypoxia. Chronic Fatigue on page 217 — long-term exhaustion that isn't relieved by rest, a serious risk to flight safety. Chronic Stress on page 136 — prolonged stress that wears down the body's resources and degrades performance. Chronobiology on page 205 — the study of biological rhythms, including circadian rhythms. Ciliary Muscles on page 76 — the muscles inside the eye that change the shape of the lens for focusing, called accommodation. Circadian Disrhythmia on page 212 — that's jet lag, the mismatch between your internal body clock and the local time zone after rapid travel. Circadian Rhythms on page 205 — the roughly 24-hour cycles in physiological processes like sleep-wake, body temperature, and hormone release. Clearing the Ears on page 95 — techniques like the Valsalva manoeuvre to equalise pressure in the middle ear during descent. Closed Question on pages 256 and 327 — a question that can be answered with a single word or yes/no, used in communication and cockpit discipline. CNS on page 59 — Central Nervous System, the brain and spinal cord. This index is your roadmap. Every one of these terms will be defined, explained, and examined in the pages that follow. We'll start at the beginning of the book and work through them systematically.