Por que seu corpo dá um tranco ao dormir?

Você está quase dormindo quando sente uma queda repentina e o corpo dá um salto. Esse fenômeno é mais comum do que parece.

[{"selector":"#anim-492fc7ae-d9ab-4cc5-97e9-e0f595a009b2 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-f55dcf5f-568e-457c-a377-b20493eaf478","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-79111379-09f6-4565-a083-a22ac8e2d8bc","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3d4123d3-975a-415e-8a4b-5802dc766eb4","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] O Tranco Inesperado

Os cientistas chamam esse evento de espasmo hipnótico. Ele costuma ocorrer na transição entre a vigília e o sono.

[{"selector":"#anim-b59bd060-6179-4878-9fd0-618273c0ea71 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-0ebe3d7d-c694-443a-990e-5bac5a0d2a35","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-cdc85ed3-6c72-4ca6-83aa-d7e8c583386a","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e99e0835-5d06-4f47-83e1-9e2d023001cf","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Um Nome para o Susto

Ao adormecer, o cérebro começa a reduzir a atividade consciente e prepara o corpo para um período de descanso.

[{"selector":"#anim-b83a7d64-5c15-4134-ba36-f8ae06e0bcc3 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-71298e3c-8609-4270-b469-b938c37fb4e8","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7e40fa18-4e7c-4bd3-9eb5-7fbf0a9b272f","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e4f8dff8-e2f9-4bb6-91f0-5355077da25f","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] O Cérebro Mudando de Estado

Nesse momento, diversos músculos começam a relaxar rapidamente, diminuindo a tensão usada para manter a postura.

[{"selector":"#anim-c1e9ec9e-9647-42ec-add5-6a73565a219b [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-a6a56746-5ca2-45fa-9cff-7192f2142356","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6d53e944-0fed-4f42-85ec-a2504e6be231","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1eedd758-8ab3-49e7-a9bc-d32c1aa3c924","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Músculos em Modo Relaxamento

Às vezes, o sistema motor interpreta essa perda de tensão como um sinal de desequilíbrio ou de queda repentina.

[{"selector":"#anim-20697a32-77f7-43cb-8814-a0f86bba449f [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-c765f4bd-990d-4153-81bb-41467977c4e6","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0ae6ffd4-de53-499b-bdcd-ab1ae5f7a7ef","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-474f0459-9ffd-4298-b253-c5f2d30e370a","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] O Erro de Interpretação

Como resposta, o cérebro dispara um comando corretivo rápido, produzindo o famoso tranco que desperta a pessoa.

[{"selector":"#anim-b1b2c5d6-4f2b-436f-b60c-e534a56b1b44 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-7568c86e-6b03-4e9c-88ef-995b09790e7f","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7a3be91f-ac03-4f02-b5d5-311be88c9bcf","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-10fdb43b-ca5d-40a8-85b4-25ace585f859","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Alarme Ligado por Engano

Uma hipótese sugere que esse mecanismo surgiu para evitar quedas durante períodos de descanso em ambientes naturais.

[{"selector":"#anim-d2558aec-afd4-48cf-938e-3094e02009d8 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-8751a539-abc8-436e-a4a8-1f39524a4206","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9a08039d-bd49-44c2-957e-5d9f225cf3fc","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-01ac1033-da34-43d5-84b2-4aa915968bb9","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Uma Herança Evolutiva?

Apesar da sensação intensa, não há queda real. Trata-se apenas de uma interpretação equivocada do sistema nervoso.

[{"selector":"#anim-ff3994b8-a0c2-4e80-a1d8-061fd7a57b13 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-7769afee-c0ca-4317-8a05-356676dd2444","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-664e81c4-975a-42fb-b6cd-66a3f1d41e1b","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-eb5ffae7-ac3a-4f85-af16-3808a633e6bd","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Queda Não Existe

Algumas pessoas relatam imagens rápidas de tropeços ou precipícios, que podem acompanhar o espasmo hipnótico.

[{"selector":"#anim-b3228ea3-4b3f-45ab-bfe9-bfbda6116cf7 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-3ab306a5-a398-4ef6-81c9-08f6e53ac644","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3ef07b8f-5ced-4628-8aba-6f88893a191f","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-471fa4cc-13da-4805-a07e-89cf7ada281a","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Sonhos Também Participam

Estresse, privação de sono, excesso de cafeína e fadiga podem aumentar a frequência desses sustos noturnos.

[{"selector":"#anim-51b04c6e-d9c5-483b-9619-970922db29a6 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-8de578c9-ed62-4e90-a114-8b93f2d2197b","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-52d14c58-3b9a-466e-b92f-fb5728fd4ffe","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-151e2397-0ecf-45f6-8170-a1b36c286edb","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] O Que Pode Favorecer o Fenômeno?

Na maioria dos casos, o espasmo hipnótico é considerado benigno e faz parte das complexas transições do sono.

[{"selector":"#anim-4042bdc4-dc26-4f96-8b7e-7aebcdbb5da4 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-2382f486-3dc8-42a2-bd86-e8a8033274da","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-297dab9d-6e10-4a61-84cc-9b8d257dc81f","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-27185c04-b94c-4305-8c47-f98bfd381498","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Um Evento Geralmente Normal

[{"selector":"#anim-ced0ca83-cf78-4331-af73-450cb9688bac","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6c44a9b2-372a-42a1-889b-c06603c0da65","keyframes":{"transform":["translate3d(-121.62163%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e81ce6fd-08be-4d57-b558-9fe4c65cf369","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-18b28b7a-622c-4d38-8a68-1cece9e9e4cb","keyframes":{"transform":["translate3d(-188.44222%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Veja Mais: Dormir parece descanso, mas seu cérebro está longe de parar