Enhancement of opioid-mediated analgesia: A solution to the enigma of placentophagia

The formalin test in mice: dissociation between inflammatory and non-inflammatory pain

1987 • 2,156 citations

Behavioral Regulation of the Milieu Interne in Man and Rat

1974 • 1,109 citations

Pharmacology of opioids.

1983 • 627 citations

Visceral pain: a review of experimental studies

1990 • 597 citations

Central and peripheral antialgesic action of aspirin-like drugs

1978 • 381 citations

Endorphin-Mediated Increases in Pain Threshold During Pregnancy

1980 • 343 citations

The Pharmacology of Thermoregulation

1973 • 273 citations

The Behavior of Domestic Animals

1985 • 259 citations

The use of quaternary narcotic antagonists in opiate research

1985 • 244 citations

The Mating-induced Release of Prolactin: A Unique Neuroendrocine Response*

1983 • 186 citations

Pain and discomfort thresholds in late pregnancy

1986 • 179 citations

Reversal of Morphine Disruption of Maternal Behavior by Concurrent Treatment with the Opiate Antagonist Naloxone

1982 • 170 citations

Human Plasma β-Endorphin during Pregnancy, Labor, and Delivery*

1981 • 165 citations

Sensory innervation of the external and internal genitalia of the female rat

1987 • 161 citations

Opiate vs non-opiate footshock-induced analgesia (FSIA): The body region shocked is a critical factor

1982 • 139 citations

Antinociceptive effects of vaginal stimulation in rats: Neurophysiological and behavioral studies

1977 • 134 citations

Chapter 6 Vagal afferent innervation of the gastrointestinal tract

1986 • 131 citations

Brainβ-Endorphin during Pregnancy, Parturition, and the Postpartum Period^*

1983 • 130 citations

Attraction and repulsion by amniotic fluids and their olfactory control in the ewe around parturition

1983 • 127 citations

The importance of amniotic fluids for the establishment of maternal behaviour in experienced and inexperienced ewes

1987 • 127 citations

Analgesic effect of vaginal stimulation in rats: Modulation by graded stimulus intensity and hormones

1976 • 119 citations

β-Endorphin-like immunoreactivity in plasma, pituitaries and hypothalamus of rats following treatment with opiates

1978 • 116 citations

Acetylsalicylic Acid. New Uses for an Old Drug.

1982 • 112 citations

Placentophagia: A biobehavioral enigma (or De gustibus non disputandum est)

1980 • 110 citations

Disruption of ongoing maternal responsiveness in rats by central administration of morphine sulfate

1984 • 108 citations

Influence of opioids on central thermoregulatory mechanisms

1979 • 106 citations

Vagal afferent modulation of a nociceptive reflex in rats: involvement of spinal opioid and monoamine receptors

1988 • 96 citations

Aspects of nonhormonal maternal behavior in the rat*1

1971 • 95 citations

Placental β-Endorphin-Like Peptides

1980 • 94 citations

Pain thresholds are elevated during pseudopregnancy

1990 • 70 citations

Quaternary naltrexone: evidence for the central mediation of discriminative stimulus effects of narcotic agonists and antagonists.

1981 • 70 citations

Attenuation of pregnancy-induced analgesia by hypogastric neurectomy in rats

1983 • 63 citations

Plasma β-endorphin concentrations prior to and during pregnancy, in labor, and after delivery

1984 • 57 citations

Sources of order in the maternal behavior of animals.

1956 • 48 citations

Placenta ingestion enhances opiate analgesia in rats

1985 • 48 citations

Pregnancy-induced analgesia: effects of adrenalectomy and glucocorticoid replacement

1984 • 43 citations

Behavioral aspects of parturition in the monkey (Macacus rhesus).

1930 • 41 citations

Ingestion of amniotic fluid enhances opiate analgesia in rats

1986 • 40 citations

Placenta on pups' skin accelerates onset of maternal behaviour in non-pregnant rats

1981 • 39 citations

Amniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesia

1990 • 38 citations

Effects of medial preoptic lesions on placentophagia and on the onset of maternal behavior in the rat

1979 • 37 citations

Opioid Plasma Levels during Labour

1982 • 35 citations

Placentophagia in nonpregnant rats: Influence of estrous cycle stage and birthplace

1976 • 34 citations

Pain and plasma beta-endorphin level during labor.

1984 • 33 citations

Placenta ingestion enhances analgesia produced by vaginal/cervical stimulation in rats

1986 • 33 citations

Human Placental β-Endorphin

1980 • 32 citations

Do endorphin residues of beta lipotropin in hormone reinforce reproductive functions?

1979 • 31 citations

Effects of hypothalamic knife cuts and experience on maternal behavior in the rat

1986 • 31 citations

Placental opioid-enhancing factor (POEF): Generalizability of effects

1991 • 31 citations

Dose-dependent enhancement of morphine-induced analgesia by ingestion of amniotic fluid and placenta

1988 • 30 citations

Amniotic fluid ingestion enhances opioid-mediated but not nonopioid-mediated analgesia

1990 • 29 citations

Effects of placentophagy on serum prolactin and progesterone concentrations in rats after parturition or superovulation

1980 • 27 citations

Similar Effects of Acetylsalicylic Acid and Morphine on Immediate Responses to Acute Noxious Stimulation

1987 • 26 citations

Pup retrieval and maternal attraction to canine amniotic fluids

1981 • 26 citations

Effects of hypophysectomy and dexamethasone treatment on plasma β-endorphin and pain threshold during pregnancy

1987 • 25 citations

Placenta as a Lactagogon

1954 • 24 citations

Induction of maternal behavior in rats: Effects of pseudopregnancy termination and placenta-smeared pups.

1987 • 22 citations

Enhancement of opioid-mediated analgesia by ingestion of amniotic fluid: Onset latency and duration

1989 • 21 citations

Amniotic-fluid ingestion enhances the central analgesic effect of morphine

1991 • 20 citations

Induction of maternal behavior in rats: Effects of pseudopregnancy termination and placenta-smeared pups.

1987 • 20 citations

Effects of lateral hypothalamic lesions on placentophagia in virgin, primiparous, and multiparous rats.

1973 • 20 citations

Factors influencing the acceptance of cesarean delivered offspring by foster mothers

1968 • 19 citations

Pain and Plasma β-Endorphin Level During Labor

1985 • 18 citations

The effects of strain, reproductive condition, and strain of placenta donor on placentophagia in nonpregnant mice

1973 • 15 citations

Increase in plasma β-endorphin-like immunoreactivity at parturition in normal women

1983 • 15 citations

Amniotic fluid ingestion before vaginal/cervical stimulation produces a dose-dependent enhancement of analgesia and blocks pseudopregnancy

1991 • 14 citations

Amniotic-fluid ingestion enhances morphine analgesia during morphine tolerance and withdrawal in rats

1991 • 14 citations

The effects of the placenta and fetal fluids on the acceptance of foster young

1973 • 12 citations

The effect of pregnancy and stress on the onset of placentophagia in Long-Evans rats

1981 • 12 citations

Endogenous analgesia in the pregnant rat: An artifact of weight-dependent measures?

1986 • 12 citations

Placentophagia in rats is modifiable by taste aversion conditioning☆

1977 • 10 citations

An investigation into opioid systems in the pregnant rat

1983 • 9 citations

Food and water intake prior to parturition in the rat

1973 • 9 citations

Effects of dose on effector mechanisms in morphine-induced hyperthermia and poikilothermia

1989 • 8 citations

Endogenous opioid peptides in intrapartum uterine blood

1984 • 6 citations

Pain and Plasma ??-Endorphin Level During Labor

1985 • 3 citations