They are arranged in a circular-shaped row just in front of the sulcus terminalis of the tongue.

Terminal sulcus or Sulcus terminalis can refer to:

On the external aspect of the right atrium, corresponding to the crista terminalis is the sulcus terminalis.

The superior border the sulcus terminalis designates the transverse plane in which the SA node resides.

The circumvallate papillae get special afferent taste innervation from cranial nerve IX, the glossopharyngeal nerve, even though they are anterior to the sulcus terminalis.

The typical appearance of the lesion is an oval or rhomboid shaped area located in the midline of the dorsal surface of the tongue, just anterior (in front) of the sulcus terminalis.

The right atrium is composed of a smooth intercaval part and a muscular part (formed by pectinate muscles) separated by an internal ridge called the crista terminalis and an external groove (sulcus terminalis).

On the right it is limited by the sulcus terminalis of the right atrium and on the left by the ligament of the left vena cava and the oblique vein of the left atrium.

They are situated on the dorsum of the tongue immediately in front of the foramen cecum and sulcus terminalis, forming a row on either side; the two rows run backward and medially, and meet in the midline.