telodiencephalic fissure

telodiencephalic fissure (tdf)

The term telodiencephalic fissure (tdf) refers to the part of the transverse cerebral fissure (tcf) that separates the ventral surfaces of the corpus callosum (cc) and fornix (fx) from the dorsal surface of the Diencephalon (IBR). Formed by the folding back of the cerebrum (EBR) over the IBR during fetal development. It is technically outside the brain. It gets its name from the Telencephalon and Diencephalon, embryonic precursors of the EBR and IBR respectively. It together with the cerebrocerebellar fissure (ccbf) constitute the transverse cerebral fissure (tcf). It is found in the human ( Riley-1943 ), macaque ( Martin-2000 ) rat and mouse ( NeuroNames ). Final 11 Dec 2025).

Also known as: telodiencephalic fissure, Fissura telo-diencephalica, telo-diencephalic fissure

NeuroNames ID: 28

All Names & Sources

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English

telo-diencephalic fissure

Riley-1943

English

telodiencephalic fissure

Martin-1997

Illustrations

Showing 2 illustration(s)

labeled line drawings of
sagittal section in
Macaca fascicularis

multiple views of
3D reconstruction in
Macaca mulatta

Species With The Structure

Equivalent By	Human	Macaque	Rat	Mouse
Topology	Has The Structure	Has The Structure	Relevant Data Not Located	Relevant Data Not Located

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Basis

Has Equivalent

Organism

Their Name

Source

Topology

Yes

Homo sapiens (human)

Fissura telo-diencephalica

Riley-1943

Topology

Yes

Homo sapiens (human)

telo-diencephalic fissure

Riley-1943

Topology

Yes

Macaca fascicularis (Macaca fascicularis)

telodiencephalic fissure

Martin-1997

Models Where It Appears

Structural CNS Model - Macaque

Brain structures of the macaque are illustrated in BrainInfo’s NeuroMaps macaque brain atlas. Structures are grouped by proximity in a hierarchy corresponding to the central nervous system hierarchy of NeuroNames ( Bowden-1995 Martin-2000 ). Structures in the NeuroMaps atlas are based on the segmentation of an MRI of the brain of a 3-year old male rhesus macaque (Macaca mulatta). The atlas is most useful for targeting structures for implantating electrodes and chemtrodes. Updated 29 Oct 2025.

brain

forebrain

cerebrum (endbrain)

diencephalon (interbrain)

hippocampal fissure (hippocampal sulcus)

telodiencephalic fissure

midbrain

hindbrain

choroidal fissure