The medial preoptic nucleus (MPN), a key region underlying the motivation to vocalize and mate (Alward et al.
Proteome-Based Analyses of the Medial Preoptic Nucleus
Validation of proteomic data and characterization of androgen receptor (AR) and estrogen receptor (ER)[alpha] expression in the medial preoptic nucleus (MPN).
The positive cells were counted within the central, lateral, and medial portions of the medial preoptic nucleus (Figure 1) using a light microscope with a KS300 imaging system (Carl Zeiss, Germany).
Representative photomicrographs showed the immunoreactive neurons (brown) for [m.sub.2]AChR of intact rats on the right side of the POA-AHA, where cells were counted within the central, lateral, and medial portions of the medial preoptic nucleus, magnification 10x (b) and 40x (c); arrowheads show the immunostained (cytoplasmic) neurons in the POA-AHA region.
A number of [m.sub.1]AChR-ir (a) or [m.sub.2]AChR-ir (b) were counted on both sides (left side plus right side) of the medial preoptic nucleus in the preoptic region at 9:00 (grey bar), 13:00 (blue bar), or 17:00 h (green bar) for each phase of the oestrous cycle.
It may be the selective loss of warm-sensitive neurons, the osmotic changes detected by the organum vasculosum laminae terminalis (OVLT), or the humoral changes (progesterone, prostaglandin) modifying the firing rate of heat sensitive neurons in the medial preoptic nucleus
The anteroventral wall of third ventricle (AV3V) that includes the organum vasculosum lamina terminalis (OVLT), the ventral portion of the MnPO, the preoptic periventricular nucleus, and the more medial aspects of the medial preoptic nucleus
is an important region that is involved in body fluid and cardiovascular regulation [25, 32, 37].
In 1978, Gorski, Gordon, Shryne, and Southam described a sexually dimorphic area of the medial preoptic nucleus
The sexually dimorphic medial preoptic nucleus
of quail: a key brain area mediating steroid action on male sexual behavior.