History Main / MasterOfYourDomain

For the more extreme cases, it's often {{Hand Wave}}d by NinetyPercentOfYourBrain and other cases of ArtMajorBiology.

* [[TheDragon Rob Lucci]] and [[LargeHam Kumadori]] of the ''OnePiece'' villains [[SecretPolice CP9]] have this ability which is called Life Return (''Seimei Kikan''). Kumadori is the one who uses it most, allowing him to do things such as [[PrehensileHair control his long hair as a weapon]] or instantly digest a large amount of food. Lucci on the other hand can use it in conjunction with his [[{{Animorphism}} Zoan Devil Fruit powers]] to ake his large [[HalfHumanHybrid Leopard-Man]] form more proportionate to his human form.

* [[TheDragon Rob Lucci]] and [[LargeHam Kumadori]] of the ''OnePiece'' villains [[SecretPolice CP9]] have this ability which is called Life Return (''Seimei Kikan''). Kumadori is the one who uses it most, allowing him to do things such as [[PrehensileHair control his long hair as a weapon]] or instantly digest a large amount of food. Lucci on the other hand can use it in conjunction with his [[Animorphism Zoan Devil Fruit powers]] to make his large [[HalfHumanHybrid Leopard-Man]] form more proportionate to his human form.

* Rob Lucci and Kumadori of the ''OnePiece'' villains [=CP9=] have this ability which is called Life Return (''Seimei Kikan''). Kumadori is the one who uses it most, allowing him to do things such as control his long hair as a weapon or instantly digest a large amount of food.

* Rob Lucchi and Kumadori of the ''OnePiece'' villains [=CP9=] have this ability. Kumadori is the one who uses it most, allowing him to do things such as control his long hair as a weapon or instantly digest a large amount of food.

* Stanton Parrish from ''{{Alphas}}'' has this to the point that he hasn't aged since the American Civil War.

* Metabolism Control in ''{{GURPS}}'' allows the character to control all autonomic biological functions.

* ''DungeonsAndDragons'' had the Suspend Animation psionic ability that allowed the practitioner to feign death.

* ''{{Paranoia}}'': the mutant abilities of Adrenalin Control (increase Strength and Endurance), Chameleon (skin pigments) and Suspended Animation.

* Pops up a few times in ''TheWorldOfDarkness'' as a low-level power in physical-based power sets, such as the Life Arcanum in ''TabletopGame/MageTheAwakening'' or the Corporeum Transmutation in ''PrometheanTheCreated''.

* The 2008 ''Film/TheIncredibleHulk'' movie has Banner learning to suppress his transformations with ujjayi breathing and meditation.

* David Berglas, Derren Brown and many other magicians perform and effect where an audience member, preferably medically qualified, monitors their pulse, tapping in time with it on a cymbal or similar for the benefit of the rest of the audience. Once a clear rhythm is established, the performer makes their pulse slow down, become erratic, and eventually stop altogether.
** This is a classic illusion in the world of mentalism, but isn't actually an example of this trope since the performer only pretends to use mental powers to slow and stop his or her pulse.

The human body is an amazing machine, the brain even more so. It is also a frustrating one at times, often acting as if it has ... well, a mind of its own. Many bodily functions are handled without our direct, conscious control, such as pulse and respiration rate, digestion, and even how we register pain. There are those who have sought to challenge the authority of the autonomic via EnlightenmentSuperpowers: ascetics and warriors, yogis and sadhu, Tibeten monks and Zen masters. Western science took the ball and ran with it to extract the concept of [[http://en.wikipedia.org/wiki/Biofeedback "biofeedback",]] a method of consciously controlling normally automatic functions of the body. The real thing is extraordinary enough (see RealLife below) but, predictably, fictional works often exaggerate it to the point of CharlesAtlasSuperpower.

* Ursula K. Le Guin's TheLeftHandOfDarkness has the ''dothé'' discipline which enables practitioners to deliberately unleash [[http://health.howstuffworks.com/human-body/bodily-feats/adrenaline-strength.htm hysterical strength]]

* The protagonist from BenBova 's ''Orion'' has complete awareness and control of every synapse in his nervous system.

* ''TheBionicWoman'' (1970's) episode "Biofeedback", which had a guest character who could use biofeedback to control his own bodily functions.

* In one episode of ''TheIncredibleHulk'' (1970s TV show), the main guest character was a cop who was also involved in martial arts, who could turn his pulse off during meditation. He and his sensei tried to help David to use meditation to suppress the change.

* The 2008 ''IncredibleHulk'' movie has Banner learning to suppress his transformations with ujjayi breathing and meditation.

* In ''Series/TheInvisibleMan'' series pilot, Darien is having trouble consciously controlling his [[AppliedPhlebotinum Quicksilver gland]], which is activated by adrenaline. This is hilariously shown when he tries to spy on a soldier and a nurse [[IfYouKnowWhatIMean getting it on]] and reappears at an inopportune moment (which the soldier did not appreciate). His brother teaches him some basic yoga techniques to allow him to not only appear and disappear at will but to also selectively make parts of his body invisible. He also learns to secrete Quicksilver on small objects, making them temporarily invisible as well.

* The AcademyOfSuperHeroes Universe has Aaron Zander aka Contact, a superhero whose power set includes a physics-violating version of this.

* The Bene Gesserit of ''{{Dune}}'' are able to manipulate every aspect of their bodily functions to the point where they could all be immortal if they wanted to but choose not to do so because it would be socially destabilizing.

* The Envoys from Richard K. Morgan's ''AlteredCarbon'' (and sequels) are all capable of manipulating their bodily function. In ''Broken Angels'', Takeshi Kovacs [[spoiler: has a neural inhibitor remote attached to his skull programmed to kill or sedate him if he so much as got angry. Willing himself completely calm, he rips it out of his head without triggering its responses.]]

* The most recent ''IncredibleHulk'' movie (2008) has Banner learning to suppress his transformations with ujjayi breathing and meditation.

* The Bene Gesserit of ''{{Dune}}'' are able to manipulate every aspect of their bodily functions. For one, it's impossible to torture someone who can (a) shut down their pain response and/or (b) commit suicide at any time by stopping their own heart. Then there's their ability to alter their body chemistry to negate poisons or even create them.

The human body is an amazing machine, the brain even more so. It is also a frustrating one at times, often acting as if it has ... well, a mind of its own. Many bodily functions are handled without our direct, conscious control, such as pulse and respiration rate, digestion, and even how we register pain. There are those who have sought to challenge the authority of the autonomic: ascetics and warriors, yogis and sadhu, Tibeten monks and Zen masters. Western science took the ball and ran with it to extract the concept of [[http://en.wikipedia.org/wiki/Biofeedback "biofeedback",]] a method of consciously controlling normally automatic functions of the body. The real thing is extraordinary enough (see RealLife below) but, predictably, fictional works often exaggerate it to the point of CharlesAtlasSuperpower.

* In ''Series/TheInvisibleMan'' series pilot, Darien is having trouble consciously controlling his [[AppliedPhlebotinum Quicksilver gland]], which is activated by adrenaline. This is hilariously shown when he tries to spy on a soldier and a nurse [[IfYouKnowWhatIMean getting it on]] and reappears at an inopportune moment (which the soldier [[{{Understatement}} did not appreciate]]). His brother teaches him some basic yoga techniques to allow him to not only appear and disappear at will but to also selectively make parts of his body invisible. He also learns to secrete Quicksilver on small objects, making them temporarily invisible as well.

* In one episode of ''TheIncredibleHulk'' (1970s TV show), the main guest character was a cop who was also involved in martial arts, who could turn his pulse off during meditation. He and his sensei tried to help David to use meditation to supress the change.

* {{Superman}} has done it too, slowing down his heartbeat to fake death and escape inprisonment as Clark Kent.

* This appears in many of VondaNMcIntyre's books, including both ''Dreamsnake'' and the ''Starfarers'' quartet. In each of them, some biofeedback ability, including the ability to render oneself temporarily sterile by altering the temperature of one's genitalia, is standard for most adults.

* Almost every book by PoulAnderson features biofeedback. BoatOfAMillionYears has Hanno the immortal who learned to accelerate his own already enhanced healing (he ''was'' an immortal after all)

* Pops up a few times in ''TheWorldOfDarkness'' as a low-level power in physical-based power sets, such as the Life Arcanum in ''MageTheAwakening'' or the Corporeum Transmutation in ''PrometheanTheCreated''.

* In JasperFforde's ''ShadesOfGrey: the road to High Saffron'', [[spoiler:Jane Grey]] can consciously control [[spoiler:the size of her pupils]], which means that unlike everyone else in the novel's {{dystopia}}n setting, [[spoiler:she can see in the dark]].

* The AcademyofSuperHeroes Universe has Aaron Zander aka Contact, a superhero whose power set includes a physics-violating version of this.

* Justin Gilead from obscure 80s spies-chess-and-ShamgriLa novel ''The Grandmaster'' had this in addition to a larger suite of [[CharlesAtlasSuperpower Charles Atlas Superpowers]].

* Pops up a few times in ''TheWorldOfDarkness'' as a low-level power in physical-based power sets, such as the Life Arcanum in ''MageTheAwakening'' or the Corporeum Transmutation in ''PrometheanTheCreated''.