Inferred network

R(Retina) → AVP(Anteroventral preoptic nucleus)
AVP(Anteroventral preoptic nucleus) → MPNl(Medial preoptic nucleus lateral part)
MPNl(Medial preoptic nucleus lateral part) → VTA(Ventral tegmental area)
VTA(Ventral tegmental area) → LHA(Lateral hypothalamic area)

Support information about direct projections from Retina to Anteroventral preoptic nucleus:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
RetinaAnteroventral preoptic nucleus existsnot knownCholera toxin conjugated to HRP
Case pg351, fig5a-e. Soma notes 36 female Sprague-Dawley rats weighing 200-350g. 10 microliters of CT-HRP(.20%-.40%) were injected into one eye ?behind the lens into the vitreous chamber of the eye. pressure injection over 1 min. Terminal notes Terminal label evident throughout the anteroventral preoptic nucleus..
Levine JD, Weiss ML, Rosenwasser AM, Miselis RR., 1991

Support information about direct projections from Anteroventral preoptic nucleus to Medial preoptic nucleus lateral part:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Anteroventral preoptic nucleusMedial preoptic nucleus lateral part lightnot knownPHAL
Case pg233. Soma notes PHA-L inj. Terminal notes not specified..
Simerly RB, Swanson LW., 1988
Anteroventral preoptic nucleusMedial preoptic nucleus lateral part existsnot knownPHAL
none provided
Simerly RB, Swanson LW., 1988
Anteroventral preoptic nucleusMedial preoptic nucleus lateral part lightnot knownPHAL
earlier: Simerly & Swanson JCN 270:209 1988 rat PHAL same material only examined and described more accurately here
Thompson R.H., Swanson L.W., 2003

Support information about direct projections from Medial preoptic nucleus lateral part to Ventral tegmental area:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Medial preoptic nucleus lateral partVentral tegmental area existsnot knownautoradiography
after excluding projections described in Simerly, Swanson, & Gorski Brain Res. 324: 185-189, 1984
Simerly RB, Swanson LW., 1986
Medial preoptic nucleus lateral partVentral tegmental area existsnot knownPHAL
Collator note: the MPN projection has a light contralateral representation, which was not described in detail.
Simerly RB, Swanson LW., 1988

Support information about direct projections from Ventral tegmental area to Lateral hypothalamic area:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Ventral tegmental areaLateral hypothalamic area lightnot knownautoradiography
Case pg198, fig3. Soma notes 3H proline/3H leucine inj. Terminal notes uncertain whether any AVT fibres actually terminated in the lateral hypothalamic region.
Beckstead RM, Domesick VB, Nauta WJ., 1979
Ventral tegmental areaLateral hypothalamic area moderatenot knownfluorescent tracers
Case pg369-71. Soma notes high numbers of neurons. Terminal notes FB inj.
Faye-Lund H., 1985
Ventral tegmental areaLateral hypothalamic area moderatenot knownCholera toxin conjugated to HRP
Case pg615, fig6. Soma notes not specified.. Terminal notes CT inj into VTA, with minor inclusion of medial SN.
Groenewegen HJ, Berendse HW., 1990