forebrain


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

prosencephalon

 [pros″en-sef´ah-lon]
1. the portion of the brain developed from the anterior of the three primary brain vesicles in the early embryo, comprising the diencephalon and telencephalon.
2. the most anterior of the primary brain vesicles; called also forebrain.

pros·en·ceph·a·lon

(pros'en-sef'ă-lon), [TA]
The anterior primordial cerebral vesicle and the most rostral of the three primary brain vesicles of the embryonic neural tube; it subdivides to form the diencephalon and telencephalon.
Synonym(s): forebrain vesicle ☆ , forebrain ☆ , proencephalon
[G. prosō, forward, + enkephalos, brain]

forebrain

(fôr′brān′)
n.
1. The most anterior of the three primary regions of the embryonic brain from which the telencephalon and diencephalon develop.
2. The segment of the adult brain that develops from the embryonic forebrain and includes the cerebrum, thalamus, and hypothalamus.

pros·en·ceph·a·lon

(pros'en-sef'ă-lon) [TA]
The anterior primordial cerebral vesicle and the most rostral of the three primary brain vesicles of the embryonic neural tube; it subdivides to form the diencephalon and telencephalon.
Synonym(s): forebrain.
[G. prosō, forward, + enkephalos, brain]

forebrain

that part of the brain which gives rise to the CEREBRAL HEMISPHERES, olfactory lobes, the PINEAL GLAND, PITUITARY GLAND and the OPTIC CHIASMA (which carries nerve fibres from the eyes to the midbrain). It is marked by a constriction in the developing embryo where the brain appears to be three-lobed, the forebrain, MIDBRAIN and HINDBRAIN.
References in periodicals archive ?
In the present study, we investigated the role of salvinorin A in cerebral pial artery protection in a rat model of forebrain ischemia injury.
Microscopic examination, including asynuclein immunostaining, demonstrated severe and diffuse LBD pathology, with characteristic involvement of brainstem nuclei, limbic structures, and basal forebrain, as well as temporal neocortex (Figure 5, A through F).
However, stimulation of neural progenitors with BDNF and NGF upregulates LHX8 expression in MGE areas of the embryonic forebrain, whereas CNTF induce LIM homeobox 6 transcription factor (LHX6) expression in other subdomains of the MGE.
BCCAo has been reported to decrease the expression of ChAT, an enzyme for Ach synthesis, in the basal forebrain of rats (Choi et al., 2011).
The rodent MFB stretches from the ventral tegmental area (VTA) in the midbrain to several forebrain structures and includes both myelinated and short typically unmyelinated ascending and descending projections.
Low-voltage activated calcium currents increase in basal forebrain neurons from aged rats.
Mice were euthanized by cervical dislocation and forebrain (without olfactory bulb) and cerebellum were dissected into 0.1 M ice-cold phosphate buffered saline (pH 7.
To evaluate the brain atrophy, forebrain and hippocampus volumes were measured.
The total number of basal forebrain cholinergic neurons in the brain of these animals had been previously assessed by unbiased stereological procedures [17].
The second section is on neuron migration during brain development and the different migratory patterns within important brain regions such as the hippocampus, forebrain, and cerebral cortex.
22 ( ANI ): Researchers have shown that interneurons located in the forebrain at the level of the prefrontal cortex are heavily involved in the control of fear responses.
They also include regions representing the ventral forebrain and even the immature retina," said one of the researchers, Madeline Lancaster.