Preferred Label : median lingual swelling;
Uberon definition : During the third week of embryological development there appears, immediately behind
the ventral ends of the two halves of the mandibular arch, a rounded swelling named
the tuberculum impar, which was described by His as undergoing enlargement to form
the buccal part of the tongue. More recent researches, however, show that this part
of the tongue is mainly, if not entirely, developed from a pair of lateral swellings
which rise from the inner surface of the mandibular arch and meet in the middle line.
The site of their meeting remains post-embryonically as the median sulcus of the tongue.
The tuberculum impar is said to form the central part of the tongue immediately in
front of the foramen cecum, but Hammar insists that it is purely a transitory structure
and forms no part of the adult tongue[WP, Gray's].;
Uberon synonym : tuberculum impar; median tongue bud; tuberculum linguale mediale;
Uberon Homology note : Most adult amphibians have a tongue, as do all known reptiles, birds and mammals.
Thus it is likely that the tongue appeared with the establishment of tetrapods and
this structure seems to be related, to some extant, to the terrestrial lifestyle.[well
established][VHOG];
Origin ID : 0006756;
Automatic exact mappings (from CISMeF team)
- See also inter- (CISMeF)
- Uberon cross reference
- develops from
- has part
- part of
During the third week of embryological development there appears, immediately behind
the ventral ends of the two halves of the mandibular arch, a rounded swelling named
the tuberculum impar, which was described by His as undergoing enlargement to form
the buccal part of the tongue. More recent researches, however, show that this part
of the tongue is mainly, if not entirely, developed from a pair of lateral swellings
which rise from the inner surface of the mandibular arch and meet in the middle line.
The site of their meeting remains post-embryonically as the median sulcus of the tongue.
The tuberculum impar is said to form the central part of the tongue immediately in
front of the foramen cecum, but Hammar insists that it is purely a transitory structure
and forms no part of the adult tongue[WP, Gray's].
