![tract of the habenula commissure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691568547-CTXYYX8G4HUKQUM0YZ30/tHC+4dpf+D.png)
tract of the habenula commissure/habenula commissure
4dpf dorsal view
![tract of the habenula commisure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691566666-7JDN373KJZ4WYDIP84KG/tHC+4dpf+L.png)
tract of the habenula commisure/habenula commissure
4dpf lateral view
![tract of the habenula commissure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691569011-BHE25DD7INJTYZAMZB80/tHC+48hpf.png)
tract of the habenula commissure/habenula commissure
48hpf lateral view
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693971877-AMFQYQ8FWN69T5MPLG0M/tAC+4dpf+L.png)
anterior commissure
4dpf lateral view. Tract of the anterior commissure shown as semi opaque.
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693972900-ZYKRI5BIGZXOG2ZUU3C2/tAC+4dpf+V.png)
anterior commissure
4dpf ventral view. Tract of the anterior commissure leading to anterior commissure shown as semi opaque.
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693973823-K1J6ZA1X0PUF5LZHNTGP/tAC+48hpf.png)
anterior commissure
48hpf lateral view. Tract of the anterior commissure shown as semi-opaque.
![torus longitudinalis](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193959685-747BAY249P3Z1PIQRPLD/TL+4dpf+D.png)
torus longitudinalis
4dpf Dorsal view
![lateral olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193959814-TFUTIDTO11EIMSVBKXAE/LOT+4dpf+D.png)
lateral olfactory tract
4dpf Dorsal view
![medial olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193964648-F74C6ZEIWH71H0XHTCTW/MOT+4dpf+D.png)
medial olfactory tract
4dpf dorsal view
![medial olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193964366-IEVBWWWZLYWVUT7W3M77/MOT+4dpf+V.png)
medial olfactory tract
4dpf ventral view
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193969555-7E1EN9UPTYB5YMLW6TDG/CC+4dpf+D.png)
cerebellar commissure
4dpf dorsal view
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193970581-F5MAMSDKUIKL5BF4JQXW/CC+4dpf+L.png)
cerebellar commissure
4dpf lateral view
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193972431-K38KBWXK3OUFYU4EK0Z3/CC+48hpf+L.png)
cerebellar commissure
48hpf lateral view
![ventral tectal fascicles](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193973646-OJ8OMGXO214QLD7T5WAM/VTF+4dpf+L.png)
ventral tectal fascicles
4dpf lateral view
![ventral tectal fascicles](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193975246-HZIOQCTB00H4TIYFGV2J/VTF+48hpf+L.png)
ventral tectal fascicles
48hpf lateral view
![optic tectum neuropil](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193979007-CNP28WFZMANO22CWGVP3/OTn+4dpf+D.png)
optic tectum neuropil
4dpf dorsal view
![optic tectum neuropil](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193978363-009G7RZSFKRYHA7Z5B62/OTn+4dpf+L.png)
optic tectum neuropil
4dpf lateral view
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193983573-BP7J0BQWR5XQXFNLGG2O/ITF+4dpf+D.png)
intertectal fascicles and commissures
4dpf dorsal view
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193981791-GTSI67C4JX340ROSJJJN/ITF+4dpf+L.png)
intertectal fascicles and commissures
4dpf lateral view.
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193984116-AQ97FVHKL6IT2WSIWXKO/ITF+48hpf+L+.png)
intertectal fascicles and commissures
48hpf lateral view
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193989032-UY2MIQ6A65OS05EUPIWB/PC+4dpf+D.png)
tract of the posterior commissure/posterior commissure
4dpf dorsal view. Posterior commissure is where the tract of the posterior commissure crosses the midline.
synonyms: caudal commissure
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193987105-GS44RXMIRZ5C4TPN3RW1/PC+4dpf+L.png)
tract of the posterior commissure/posterior commissure
4dpf lateral view. The posterior commissure is where the tract of the posterior commissure crosses the midline.
synonyms: caudal commissure
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193989439-8H0771CPC32BCQ1OI7A9/PC+48hpf+L.png)
tract of the posterior commissure/posterior commissure
48hpf lateral view. The posterior commissure is where the tract of the posterior commissure crosses the midline.
synonyms: caudal commissure
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193994189-5SQM479BWLQSELGB4WJC/DVDT+4dpf+D.png)
dorsoventral diencephalic tract
4dpf dorsal view. This tract originstas from the epiphysis and connects with the tract of the postoptic commissure in the ventral diencephalon.
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193992327-PQL4AGIQCZKDIRDKUODY/DVDT+48hpf+L.png)
dorsoventral diencephalic tract
48hpf lateral view. This tract originates from the epiphysis/pineal organ and connects with the tract of the postoptic commissure in the ventral diencephalon.
![StMed 4dpf D.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193997477-2QLYMINIM5ESIVCF6P22/StMed+4dpf+D.png)
![StMed 4dpf L.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193997252-SOVHJ9T19IBWLFOZLBEW/StMed+4dpf+L.png)
![StMed 48hpf L.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193999578-VRLJ7DM01F1MNX1R8IN6/StMed+48hpf+L.png)
![horizontal commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194000301-L85D2DY47X1F7QYJ3L4C/chor+4dpf+L.png)
horizontal commissure
4dpf lateral view.
![horizontal commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194003498-NIKIUG9ZCO8HY42B2RMH/chor+4dpf+V.png)
horizontal commissure
4dpf ventral view
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194003306-YLC2FSMCMG1AHIVYQYTT/tpoc+4dpf+L.png)
tract of the postoptic commissure/postoptic commissure
4dpf lateral view
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194007563-BKF6NFOPNQR3LVB1QXKZ/tpoc+4dpf+V.png)
tract of the postoptic commissure/postoptic commissure
4dpf ventral view
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194006200-ERI3C7YSTXMDQJZTEI8J/tpoc+48hpf+L.png)
tract of the postoptic commissure/postoptic commissure
48hpf lateral view
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194008763-2H4D8CX6FGKH3JCH60DK/SOT+4dpf+L.png)
supraoptic tract/lateral forebrain bundle
4dpf lateral view
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194011479-0H7ZEIIP801MDEUSTEB4/SOT+4dpf+V.png)
supraoptic tract/lateral forebrain bundle
4dpf ventral view
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194011291-T0E7J5F1M1YR9GG12IIF/SOT+48hpf+L+.png)
supraoptic tract/lateral forebrain bundle
48hpf lateral view
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194014214-CU1MDSF0JVB2L1EUYFG9/OT+4dpf+L.png)
optic tract
4dpf lateral view
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194015825-OLK2NF7UP6T2GAMMFGYP/OT+4dpf+V.png)
optic tract
4dpf ventral view
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194016543-OW28GOIUUH1MU1GWQEPL/OT+48+L.png)
optic tract
48hpf lateral view
![optic chiasm](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210485346-FQ6T44GLJT43V87U9H1U/optic+chiasm+frontal.png)
optic chiasm
Transverse section of brain and eyes of a zebrafish embryo 3 days post fertilization. The retinal ganglion cell layer of the retina and the optical neurons projecting to the optic tectum, the visual processing centre of the brain, are seen in green. Nuclei are counterstained with DAPI (magenta).
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210485425-92FVCGVM1TG2CH10UH9Z/OT+frontal.png)
optic tract
Transverse section of brain and eyes of a zebrafish embryo 3 days post fertilization. The retinal ganglion cell layer of the retina and the optical neurons projecting to the optic tectum, the visual processing centre of the brain, are seen in green. Nuclei are counterstained with DAPI (magenta).
![optic nerve](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210486679-FPSCADTQOBG7LVUUOKO2/ON+frontal.png)
optic nerve
Transverse section of brain and eyes of a zebrafish embryo 3 days post fertilization. The retinal ganglion cell layer of the retina and the optical neurons projecting to the optic tectum, the visual processing centre of the brain, are seen in green. Nuclei are counterstained with DAPI (magenta).
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528211051014-N3GFRX1BE6YP70B719KS/dvdt+foxd3.png)
dorsoventral diencephalic tract
4dpf lateral view of tg(foxd3:GFP) brain labelled with anti-GFP(FIRE) and anti-tubulin(grey).
![tract of the habenula commissure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691568547-CTXYYX8G4HUKQUM0YZ30/tHC+4dpf+D.png)
![tract of the habenula commisure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691566666-7JDN373KJZ4WYDIP84KG/tHC+4dpf+L.png)
![tract of the habenula commissure/habenula commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527691569011-BHE25DD7INJTYZAMZB80/tHC+48hpf.png)
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693971877-AMFQYQ8FWN69T5MPLG0M/tAC+4dpf+L.png)
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693972900-ZYKRI5BIGZXOG2ZUU3C2/tAC+4dpf+V.png)
![anterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1527693973823-K1J6ZA1X0PUF5LZHNTGP/tAC+48hpf.png)
![torus longitudinalis](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193959685-747BAY249P3Z1PIQRPLD/TL+4dpf+D.png)
![lateral olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193959814-TFUTIDTO11EIMSVBKXAE/LOT+4dpf+D.png)
![medial olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193964648-F74C6ZEIWH71H0XHTCTW/MOT+4dpf+D.png)
![medial olfactory tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193964366-IEVBWWWZLYWVUT7W3M77/MOT+4dpf+V.png)
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193969555-7E1EN9UPTYB5YMLW6TDG/CC+4dpf+D.png)
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193970581-F5MAMSDKUIKL5BF4JQXW/CC+4dpf+L.png)
![cerebellar commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193972431-K38KBWXK3OUFYU4EK0Z3/CC+48hpf+L.png)
![ventral tectal fascicles](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193973646-OJ8OMGXO214QLD7T5WAM/VTF+4dpf+L.png)
![ventral tectal fascicles](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193975246-HZIOQCTB00H4TIYFGV2J/VTF+48hpf+L.png)
![optic tectum neuropil](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193979007-CNP28WFZMANO22CWGVP3/OTn+4dpf+D.png)
![optic tectum neuropil](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193978363-009G7RZSFKRYHA7Z5B62/OTn+4dpf+L.png)
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193983573-BP7J0BQWR5XQXFNLGG2O/ITF+4dpf+D.png)
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193981791-GTSI67C4JX340ROSJJJN/ITF+4dpf+L.png)
![intertectal fascicles and commissures](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193984116-AQ97FVHKL6IT2WSIWXKO/ITF+48hpf+L+.png)
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193989032-UY2MIQ6A65OS05EUPIWB/PC+4dpf+D.png)
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193987105-GS44RXMIRZ5C4TPN3RW1/PC+4dpf+L.png)
![tract of the posterior commissure/posterior commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193989439-8H0771CPC32BCQ1OI7A9/PC+48hpf+L.png)
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193994189-5SQM479BWLQSELGB4WJC/DVDT+4dpf+D.png)
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193992327-PQL4AGIQCZKDIRDKUODY/DVDT+48hpf+L.png)
![StMed 4dpf D.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193997477-2QLYMINIM5ESIVCF6P22/StMed+4dpf+D.png)
![StMed 4dpf L.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193997252-SOVHJ9T19IBWLFOZLBEW/StMed+4dpf+L.png)
![StMed 48hpf L.png](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528193999578-VRLJ7DM01F1MNX1R8IN6/StMed+48hpf+L.png)
![horizontal commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194000301-L85D2DY47X1F7QYJ3L4C/chor+4dpf+L.png)
![horizontal commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194003498-NIKIUG9ZCO8HY42B2RMH/chor+4dpf+V.png)
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194003306-YLC2FSMCMG1AHIVYQYTT/tpoc+4dpf+L.png)
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194007563-BKF6NFOPNQR3LVB1QXKZ/tpoc+4dpf+V.png)
![tract of the postoptic commissure/postoptic commissure](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194006200-ERI3C7YSTXMDQJZTEI8J/tpoc+48hpf+L.png)
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194008763-2H4D8CX6FGKH3JCH60DK/SOT+4dpf+L.png)
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194011479-0H7ZEIIP801MDEUSTEB4/SOT+4dpf+V.png)
![supraoptic tract/lateral forebrain bundle](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194011291-T0E7J5F1M1YR9GG12IIF/SOT+48hpf+L+.png)
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194014214-CU1MDSF0JVB2L1EUYFG9/OT+4dpf+L.png)
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194015825-OLK2NF7UP6T2GAMMFGYP/OT+4dpf+V.png)
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528194016543-OW28GOIUUH1MU1GWQEPL/OT+48+L.png)
![optic chiasm](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210485346-FQ6T44GLJT43V87U9H1U/optic+chiasm+frontal.png)
![optic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210485425-92FVCGVM1TG2CH10UH9Z/OT+frontal.png)
![optic nerve](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528210486679-FPSCADTQOBG7LVUUOKO2/ON+frontal.png)
![dorsoventral diencephalic tract](https://images.squarespace-cdn.com/content/v1/58065fb61b631b37ff3ce66a/1528211051014-N3GFRX1BE6YP70B719KS/dvdt+foxd3.png)