Cephalic Phase
Cephalic Phase - Related Videos
01:24
Cephalic Phase of Digestion
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2024
The process of digestion is composed of three stages – cephalic, gastric, and intestinal – each with a distinct control center. The cephalic phase is the first stage, and it starts even before the food enters the stomach. It is controlled by the central nervous system and is initiated by any food-related sensory stimuli, such as the sight and smell of food, which send signals to the brain. While eating, the taste receptors intensify these signals, which travel to the cerebral cortex and then to...
07:23
A Protocol for Genetic Induction and Visualization of Benign and Invasive Tumors in Cephalic Complexes of Drosophila melanogaster
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Cited by 5 •
2013
Cooperation between an activated oncogene like RASV12 and mutations in cell polarity genes like scribbled, result in tumor growth in Drosophila where tumor cells also display invasive behaviors. Here a simple protocol for the induction and observation of the benign and invasive tumors is presented.
08:49
External Cephalic Version: Is it an Effective and Safe Procedure?
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Cited by 10 •
2020
This article shows how to perform the external cephalic version (ECV) by two experienced obstetricians in the obstetric operating room in the presence of an anesthesiologist and a midwife. The ECV is carried out with analgesia and tocolysis. Two attempts are made under ultrasonography control.
02:39
Phase Diagrams
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2020
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
02:31
Phase Transitions
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2020
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...
FAQs
Parasympathetic output through the vagus nerve links food-related sensory processing with digestive preparation. After the brain detects a cue, vagal signals stimulate salivation and gastric secretions before nutrients arrive in the stomach. This neural route therefore coordinates digestive organs in advance, allowing the body to begin processing efficiently when eating starts.
The initiating signal does not depend on nutrients already entering the stomach. Sight, smell, taste, and thoughts of food can each provide information that activates the brain, which then engages parasympathetic output. This explains why the Cephalic Phase is anticipatory: sensory and cognitive aspects of feeding can influence digestive activity before stomach exposure.
An early insulin response extends preparation beyond the digestive tract. Food-related cues can promote insulin release before nutrient arrival, linking anticipatory neural activity with metabolic handling. In this context, insulin is part of the body's advance response to eating, helping explain why the Cephalic Phase is relevant to both digestion and metabolism.
The key distinction is timing and trigger. The Cephalic Phase begins from food-related sensory or cognitive cues, whereas later digestive activity occurs after food reaches the stomach. This contrast separates neural anticipation from responses associated with the physical presence of food, making the phase useful for analyzing how preparation shapes subsequent nutrient processing.
It provides a direct example of the brain influencing digestive organs through a neural pathway before nutrients arrive. Sensory information is converted into vagal signals that alter salivation and gastric secretion, creating a useful biological model of brain-gut communication. Studying this relationship connects neural processing with the body's preparation for feeding.
Food-related cues provide a biological context for appetite regulation and feeding behavior as well as digestive preparation. Because sight, smell, taste, and thoughts can activate the brain before eating, the response links perception and cognition with physiological readiness. This makes the phase relevant when examining how cues influence the transition toward eating.