Ranura del esternón

13:06 May 9, 2021 

Thank you everyone for your answers and comments.

13:04 May 9, 2021 

Yes, I agree. There doesn't seem to be an informal equivalent to "Ranura del esternón" in English. So I think that, probably, using any of the formal English terms is the closest equivalent to the ST.

19:51 May 8, 2021 

I have found a 19th century reference to this suprasternal/jugular notch, "salt-cellar", although I understand it would not work in this case.

SALT-CELLAR
In 19th century slang, the small round hollow between the collarbones at the base of the neck—and in particular a young woman’s neck—was nicknamed the salt-cellar, a reference to the small bowls or basins of salt used in kitchens. (That hollow’s proper anatomical name, incidentally, is the suprasternal notch.)
https://www.mentalfloss.com/article/58752/30-old-and-useful-...

My own feeling when I answered was that the context might ask not for the proper anatomical name of this "dip" (suprasternal notch or fossa jugularis) but for a more colloquial denomination. I am not so sure now that jugular notch is such a colloquial name for the suprasternal notch, but I haven't been able to find any other non-formal -but not too colloquial- denomination that fits the original context (hollow of the throat, plender gap, dip between neck and collarbones).

13:05 May 8, 2021 

Yes, it does appear to refer to the suprasternal notch.

https://es.thesecretsofyoga.com/Revista/09-2008/yoga-eyes.ht...
https://www.thesecretsofyoga.com/newsletter/09-2008/yoga-eye...

Although this yoga website refers to it by the shortened "sternal" notch I would assume suprasternal notch is what is meant. It is, after all, a non-medical website so not necessarily subject to a medical or scientific level of accuracy. The same would apply to the Spanish use of the term "Ranura del esternón". As Marcelo points out, it is a very unusual description and, we could say, a curious one, considering that there are other formal ways to describe it other than "muesca supraesternal". This seems to make sense, as the text I am working with is a kinesiology manual, which is not a field that is generally considered to be part of mainstream medicine and, therefore, may not always necessarily be expected to use the formal/scientific terms.

09:11 May 8, 2021 

... was my first thought, but couldn't find any reference links for that term in humans, although I didn't spend a lot of time searching either.

00:55 May 8, 2021 

The suprasternal notch, also known as the fossa jugularis sternalis, or jugular notch, or Plender gap is a large, visible dip in between the neck in humans, between the clavicles, and above the manubrium of the sternum.

https://en.wikipedia.org/wiki/Suprasternal_notch

Al parecer el texto que estas traduciendo tiene menos rigor científico que el de tus preguntas anteriores. El término "ranura del esternón" aparece unas 3 veces en la búsqueda de Google (incluyendo el posteo de tu pregunta), así que no es una denominación muy común. Creo que sí, como tu dices, la que más aparece en las búsquedas es "jugular notch" pero eso por sí solo no basta para sacar conclusiones.

23:56 May 7, 2021 

Yes, I think so.