Uberon definition : Predominantly gray matter midbrain structure lying dorsal to the crus cerebri and
ventral to the midbrain tegmentum. It is divided into a dorsal, cellularly compact
region known as the pars compacta and a more ventrally located, containing more loosely
packed cells, the pars reticulata. The most lateral region of the reticulata is identified
as the pars lateralis (MM).;
Uberon synonym : Soemmering's substance; nucleus of basis pedunculi;
Uberon related term : substancia nigra;
Uberon broad term : SN;
Uberon Homology note : (...) the substantia nigra first appears in reptiles and is best developed in primates.[well
established][VHOG];
Predominantly gray matter midbrain structure lying dorsal to the crus cerebri and
ventral to the midbrain tegmentum. It is divided into a dorsal, cellularly compact
region known as the pars compacta and a more ventrally located, containing more loosely
packed cells, the pars reticulata. The most lateral region of the reticulata is identified
as the pars lateralis (MM).