View source for Terminal sulcus (heart)

{{Short description|Area of the heart}}
{{Infobox anatomy
| Name        = Terminal sulcus
| Latin       = sulcus terminalis cordis
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The '''terminal sulcus''' is a groove on the outer surface of the [[right atrium]] of the [[heart]] marking the transition between the [[Sinus venarum|sinus venarum cavarum]] (which has a distinct embryological origin) and the rest of the right atrium (which features [[pectinate muscle]]s on its inner surface). The terminal sulcus corresponds to the position of the [[Crista terminalis|terminal crest]] on the inner surface of the right atrium. The terminal sulcus (and crest) indicate the position of the [[sinoatrial node]].<ref>{{Cite book |title=Sobotta Anatomy Textbook: English Edition with Latin Nomenclature |date= |publisher=Elsevier |year=2018 |isbn=978-0-7020-6760-0 |editor-last=Waschke |editor-first=Jens |edition=1st |location=München |pages=264 |editor-last2=Böckers |editor-first2=Tobias M. |editor-last3=Paulsen |editor-first3=Friedrich |editor-last4=Arnold |editor-first4=Wolfgang |editor-last5=Bechmann |editor-first5=Ingo}}</ref>

== Anatomy ==
{{Unreferenced section|date=August 2023}}
The terminal sulcus extends from the front of the [[superior vena cava]] to the front of the [[inferior vena cava]], and represents the line of union of the [[sinus venosus]] of the [[embryo]] with the [[primitive atrium]].

The superior border of the terminal sulcus designates the transverse plane in which the [[SA node]] resides. The inferior border designates the transverse plane in which the [[AV node]] resides.

==References==
{{Reflist}}
{{Gray's}}

{{Heart anatomy}}
{{Portal bar|Anatomy}}
{{Authority control}}

[[Category:Cardiac anatomy]]


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