Vaginal lubrication. Vaginal lubrication is a naturally produced fluid that lubricates a woman's vagina. Vaginal lubrication is always present, but production increases significantly near ovulation and during sexual arousal in anticipation of sexual intercourse. Vaginal dryness is the condition in which this lubrication is insufficient, and sometimes artificial lubricants are used to augment it. Without sufficient lubrication, sexual intercourse can be painful to women as well as their male partners. The vaginal lin
Therefore, the basal ganglia can also be defined as a large mass of grey matter composed of the corpus striatum, amygdala and claustrum, and is situated deep within the white matter of the cerebral hemispheres.he basal ganglia or basal nuclei are large masses of grey matter located within the central core of white matter of the cerebral hemispheres. The basal ganglia is composed of the following grey nuclei:
The basal forebrain is a collection of structures located to the front of and below the striatum.It includes the nucleus accumbens, nucleus basalis, diagonal band of Broca, substantia innominata, and medial septal nuclei.timulating the basal forebrain gives rise to acetylcoline release, which induces wakefulness and REM sleep, whereas inhibition of acetylcholine release in the basal forebrain by adenosine causes slow wave sleep. Adenosine acts on A1 receptors of cholinergic neurons in the basal forebrain.