Ansa lenticularis
Encyclopedia
The ansa lenticularis is a part of the brain, making up the superior layer of the substantia innominata of Meynert
. Its fibers, derived from the medullary lamina of the lentiform nucleus
, pass medially to end in the thalamus
and subthalamic region, while others are said to end in the tegmentum
and red nucleus
.
It is classified by NeuroNames
as part of the subthalamus
.
Substantia innominata
The substantia innominata of Meynert is a stratum in the human brain consisting partly of gray and partly of white substance, which lies below the anterior part of the thalamus and lentiform nucleus...
. Its fibers, derived from the medullary lamina of the lentiform nucleus
Lentiform nucleus
The lentiform nucleus or lenticular nucleus comprises the putamen and the globus pallidus within the basal ganglia. It is a large, cone-shaped mass of gray matter just lateral to the internal capsule.-Etymology:...
, pass medially to end in the thalamus
Thalamus
The thalamus is a midline paired symmetrical structure within the brains of vertebrates, including humans. It is situated between the cerebral cortex and midbrain, both in terms of location and neurological connections...
and subthalamic region, while others are said to end in the tegmentum
Tegmentum
The tegmentum is a general area within the brainstem. It is located between the ventricular system and distinctive basal or ventral structures at each level...
and red nucleus
Red nucleus
The red nucleus is a structure in the rostral midbrain involved in motor coordination. It comprises a caudal magnocellular and a rostral parvocellular part.-Function:...
.
It is classified by NeuroNames
NeuroNames
NeuroNames is an integrated nomenclature for structures in the brain and spinal cord of the four species most studied by neuroscientists: human, macaque, rat and mouse. It offers a standard, controlled vocabulary of common names for structures, which is suitable for unambiguous neuroanatomical...
as part of the subthalamus
Subthalamus
The subthalamus is a part of the diencephalon. Its major part is the subthalamic nucleus. Functionally, it also encompasses the globus pallidus, which is topographically part of the telencephalon.-Anatomy:...
.