Inferred network

R(Retina) → MPN(Medial preoptic nucleus)
MPN(Medial preoptic nucleus) → PAG(Periaqueductal gray)
PAG(Periaqueductal gray) → CEA(Central nucleus of amygdala)
CEA(Central nucleus of amygdala) → LHA(Lateral hypothalamic area)

Support information about direct projections from Retina to Medial preoptic nucleus:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
RetinaMedial preoptic nucleus light/moderatenot knownCholera toxin conjugated to HRP
Case pg348,349, fig5a-f. 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 Medial component of the RHT included labeled fibres and terminals found near the midline involved the medial half of the medial preoptic area terminals evident in the ventral part of the medial preoptic nucleus.
 Levine JD, Weiss ML, Rosenwasser AM, Miselis RR., 1991

Support information about direct projections from Medial preoptic nucleus to Periaqueductal gray:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Medial preoptic nucleusPeriaqueductal gray lightnot knownHRP/WGA
Case table1. Soma notes periventricular grey. Terminal notes WGA-HRP inj.
 Chiba T, Murata Y., 1985
Medial preoptic nucleusPeriaqueductal gray existsnot knownPHAL
Collator note: repeats not included from Swanson, Mogenson, Gerfen, & Robinson Brain Res. 295:161-178, 1984
 Swanson L.W., Mogenson G.J., Simerly R.B., Wu M., 1987

Support information about direct projections from Periaqueductal gray to Central nucleus of amygdala:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Periaqueductal grayCentral nucleus of amygdala lightnot knownHRP
Case table2. Soma notes central amygdala. Terminal notes HRP inj.
 Beitz AJ., 1982

Support information about direct projections from Central nucleus of amygdala to Lateral hypothalamic area:
Sending structure Receiving structureStrength of projection Type of connectionTechniqueGeneral descriptionCollatorAssociated reference
Central nucleus of amygdalaLateral hypothalamic area lightnot knownHRP/WGA
Case pg427, fig5. Soma notes not specified.. Terminal notes WGA-HRP inj into depressor sites, core of inj site in LHAp/LHAt/VTA/SN.
 Allen GV, Cechetto DF., 1993