raphe


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raphe

[′rā·fē]
(anatomy)
A broad seamlike junction between two lateral halves of an organ or other body part.
(botany)
The part of the funiculus attached along its full length to the integument of an anatropous ovule, between the chalaza and the attachment to the placenta.
The longitudinal median line or slit on a diatom valve.
References in periodicals archive ?
The raphe is large and expanded at the chalazal end of the seed, a hypostase is present, endosperm is apparently free nuclear (Biradar and Mahabale, 1976), and the cotyledons of the embryo are straight.
Median raphe cyst of the penis: a report of two cases with immunohistochemical investigation.
Differential diagnosis for a cystic lesion in the perineum includes a tail gut cyst (a developmental lesion lined with gastrointestinal epithelium which would be retro-rectal (7), perineal median raphe cysts (8) or urethral and seminal vesicle cysts which would be connected to the urological system.
Raphe Langdon, chief financial officer at Emtelle, said: "We've been looking for opportunities in this key emerging market for some time and this acquisition allows us to share technological insight and widen Parixit Industries Limited's product ranges.
The team examined the nerve cells present in the region of the brain called dorsal raphe.
Certain neuronal pathways regulate arousal and the sleep-wake cycle, including the cholinergic basal forebrain nuclei, the serotoninergic dorsal and median raphe nuclei, and the noradrenergic locus coeruleus (Saper, Chou, & Scammell, 2001; Vitiello & Borson, 2001).
Specialized cells in a part of the brain called the raphe nuclei produce serotonin.
Hypocretinergic neurons also send projections into brainstem areas that control various aspects of wake and rapid eye movement (REM) sleep (the locus ceruleus, raphe nuclei and reticular formation).
The contemporary theory for the mechanism of NREM sleep thus suggests a reciprocal interaction between two antagonistic neurons in the VLPO of the anterior hypothalamus and wake-promoting neurons in the tuberomammillary nuclei of the posterior hypothalamus, as well as locus coeruleus, dorsal raphe, basal forebrain and mesopontine tagmentum (6,20).
Input to this system comes from the prefrontal cortex, and output flows through the noradrenergic fibers of the locus coeruleus, and serotonergic fibers from the median raphe.
neurons with thin, unmyelinated, corticopedal fibers projecting from cell bodies in the brain stem, including the acetylcholine neurons of the nucleus basalis of Meynert (detail learning), the norepinephrine neurons of the locus coeruleus (reward-related learning/Skinnerian conditioning), and the serotonin neurons of the dorsal raphe nucleus (classical/ Pavlovian conditioning).